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Car Hacks & Mods for Dummies

donour (Donour Sizemore) writes "I recently bought a high-performance automobile that has a reputation for its tuning potential. Before making the purchase, I joined several online forums for enthusiasts in order to get a good reading on how happy people are with the particular model. I was amazed at the vibrant communities built around websites such as evolutionm.net and nasioc.com. A wealth of information is available, but the data is surrounded by noise. For every knowledgeable enthusiast, there are many more misinformed or incorrect speculators whose opinions usually spring from personal preference or a need to hear themselves talk. Enter David Vespremi's Car Hacks & Mods for Dummies." Read on for the rest of Sizemore's review. Car Hacks & Mods for Dummies author David Vespremi's pages 384 publisher Wiley & Sons rating 9 reviewer Donour Sizemore ISBN 0764571427 summary Presents the big-picture view of car mods that have to do with making the car stop, go, turn, and keep the occupants safe.

In general, I steer myself and others away from the "for Dummies" book series since I believe a lot of material at this level can be found on the internet for free. HOWTOs and tutorials abound for using and modifying most consumer products. In this case, the time saved from filtering online discussion is well worth it. The book is well organized, with separate sections devoted to handling, power, braking, engine management, safety, and cosmetics. There are 26 chapters spread across 360 pages. As you can see, chapters are short and can be tackled easily during lunch or a short taxi ride to retrieve your broken car.

Slashdot readers may be surprised to learn that there is no discussion of entertainment electronics such as stereos or car-mounted computers. This should not be confused with engine management units (ECU). ECUs are discussed at length. Car Hacks & Mods for Dummies main focus is making your car go, stop and turn. Sections were added for safety and cosmetics, but performance is by far the emphasis.

The book does not actually explain how to do any specific modifications whatsoever. Instead it serves as a guidebook to learn what options are out there and compare one upgrade path to another. For example, there is a great explanation of the differences between a turbocharger and a supercharger, but you're not going to get an analysis of the mods required to support your brand new 10.5cm hotside. Instead there are careful treatments of the pros and cons associated with almost any upgrade car car enthusiast may be considering. The coverage of jargon and rating systems used for various products is especially useful. Whenever a new subject or car component is mentioned, the author goes over regulating and standardizing bodies (the DOT, EPA, and SAE) as well as explains how parts, pieces, and fluids are rated. While this is useful when thinking about a new project, it isn't the information someone would want to rely on once they begin such an undertaking itself. The author clearly states, "this book is not intended to be an instruction manual."

The author gets high marks for addressing safety -- both the driver's and the vehicle's -- before any modification. The emphasis on maintaining legal and effective safety devices on a tuner car is something you are not likely to get during an argument about which upgrade path is optimal, nor is it obvious that many safety 'upgrades' -- 4-point harnesses, flashy roll-bars -- actually decrease driver safety when used on the street. In addition the author consistently gives warning when introducing a mod that could put added stress on a vehicle.

If you are a professional mechanic, this book is not for you. You already know most of the contents. Mechanics would be better served by product literature and shop manuals. If you are thinking about modifying your car, but don't have any idea where to start, this is probably a good place. Just be sure to read the first chapter. Car modding quickly becomes expensive, and jumping in without knowing the attached costs (which this book addresses) can be a financial nightmare.

You can purchase Car Hacks & Mods from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

56 of 373 comments (clear)

  1. Noises by fembots · · Score: 3, Insightful

    A wealth of information is available, but the data is surrounded by noise. For every knowledgeable enthusiast, there are many more misinformed or incorrect speculators whose opinions usually spring from personal preference or a need to hear themselves talk.

    Instead of reading other websites or books, he should have done a AskSlashdot :)

    In my opinion (a WRX), it's best to leave any mods/upgrades to the experts. If you have the money to spend on mods, you should have the money to pay for the experts' time. Cars, in most cases, are the second most expensive asset a person's going to get (after a supercomputer), so I would rather put it in good hand, and just enjoy the outcome, not the journey of car mods.

    1. Re:Noises by boudie · · Score: 3, Insightful

      And how you become an expert is the same as with computers, you first get an old one and tear it apart. Bonus points for putting it back together.

    2. Re:Noises by Short+Circuit · · Score: 4, Insightful

      I know a couple people who mod their cars. The impression I get is that, for them, the joy is in the journey, not the destination. One guy I know sells cars and boats off once he's done fixing them up.

    3. Re:Noises by `Sean · · Score: 4, Insightful

      I'd tend to agree when it comes to novices and people who want a fast daily driver. But, personally, I'd rather become an expert myself and turn every bolt. That's why I built my own project car from the ground up for rally and ice racing.

      But, by your logic, most computer users of high end systems should only trust installing software to the experts at Best Buy. ;)

    4. Re:Noises by `Sean · · Score: 2, Insightful

      Rephrase: novices getting in over their heads and people with no interest in mechanics who want a fast daily driver.

    5. Re:Noises by lashi · · Score: 4, Funny
      >Cars, in most cases, are the second most expensive asset a person's going to get (after a supercomputer),

      Most people would say house, but we are on slashdot so I am glad you have your priority straight.

    6. Re:Noises by Big+Smirk · · Score: 2, Interesting

      That's it, you are out of the hacker club! :)

      There are different levels of mods.

      Beginner - bolt on the exhaust and make vroom vroom noises. Do you really want to pay someone $70/hr to install this?

      Intermediate - replacing engine components - camshaft heads; Bolting on superchargers. Almost everything in kit form. Requires an investment in tools (Sear Craftsman - not too bad)

      Advanced - Fabrication! Welding in roll cages (maybe even bending them yourself). Welding up your own exhaust because no one makes it off the shelf and you can't afford custom ($3000). You find yourself asking what the hydraulic ratio of a particular brake master cylinder is. You know you are at this level where part of your long term plans is to repaint the car "when you are done". Lets just say tool costs have gone up a bit. $3000 for a TIG welder, $1000 in tube bender (including dies), about $1000 in saws, grinders, shapers, and real car hackers of course have the modified tools - example - a band saw that can cut pre-bent tubing perfectly along radiuses. Other clues are being on a first name basis with the sales and tech people at companies like OTC, Miller, and Kent Moore

      There's an old hotrodder saying "Nothing beats cubic inches"... and the lesser known other half... "Except cubic dollars"

      --
      TODO: create/find/steal funny sig.
  2. Install a larger fan for modding? by Anonymous Coward · · Score: 5, Funny

    Do I need to install a really big fan on my car to mod it?

    1. Re:Install a larger fan for modding? by Solder+Fumes · · Score: 4, Funny

      I'm going to go all-out l337 and install a water-cooling kit!

    2. Re:Install a larger fan for modding? by EtherAlchemist · · Score: 2, Funny


      I'm going to go all-out l337 and install a water-cooling kit!

      Ha! Mine CAME with liquid cooling!

      --
      R(k)
    3. Re:Install a larger fan for modding? by DeDmeTe · · Score: 2, Funny

      Nope, just a HUGE wing, tons of stickers (they add about 5hp a piece) and the biggest, most obnoxious sounding coffee-can exhaust pipe you can find. Extra points for "cutting" your own springs for a lower ride. To increase handling, make sure to get the oversized 18" rims with 1" low-pro tires, make sure you get a few spares, and keep that jack handy! Oh.. and don't forget to get the carbon fiber hood. Before you know it.. your Chevy Cav will be blowing the doors off of Z's, RX8's, Vette's, Vipers... you will 0wn the road..dude.

      --
      -Guns kill people like spoons made Rosie O'Donnell fat-
  3. Type R by Grayden · · Score: 5, Funny

    Does the book cover proper application of Type R decals?

    1. Re:Type R by ebooher · · Score: 2, Funny

      What are you talking about!? I have Sw33t Type-R decals on my Chevrolet Cavalier sedan. You're just jealous of those more l337 than you.

      --
      "Genius may shine aloof and alone, like a star, but goodness is social, and it takes two men and God to make a Brother."
    2. Re:Type R by Anonymous Coward · · Score: 2, Funny

      Type-R, phesh, whatever... I have a "Maserati" sticker across my windshield. ... I drive a rusty late 80's 4-door Cavalier with the paint peeling off, the next sticker is going to be "2fast4paint".

  4. Sweet by Nickdawwg · · Score: 2, Funny

    I'd like the Speed racer kit please.

  5. And I thought it only happend on /. by RealAlaskan · · Score: 3, Funny
    For every knowledgeable enthusiast, there are many more misinformed or incorrect speculators whose opinions usually spring from personal preference or a need to hear themselves talk.

    And I thought it only happend on /.

  6. Watch out, they see you coming! by `Sean · · Score: 4, Informative
    1. Re:Watch out, they see you coming! by Jens_UK · · Score: 2, Funny
      But we're not doing our job:

      Currently Active Users: 1712 (973 members and 739 guests)

      Most users ever online was 6057, 01-18-2004 at 10:35 AM.

  7. Yes, and? by jawtheshark · · Score: 2, Insightful
    For every knowledgeable enthusiast, there are many more misinformed or incorrect speculators whose opinions usually spring from personal preference or a need to hear themselves talk.

    And this differs from Slashdot, how? ;-)

    Driving an unmodified car and proud of it. Can't stand "overtuned" cars.

    --
    Ahhh...the great dumpster continuum. Many a free computer will be found there. -- sowth (748135)
  8. Spoliers! by DogDude · · Score: 4, Interesting

    I hope that this book explains the usefulness of putting giant spoilers on front wheel drive cars to all idiots who continue to do so. I also hope that it explains the difference between a real exhaust system, and a fart pipe. Kids these days are really, really, really stupid, it seems (either that, or I'm getting old).

    --
    I don't respond to AC's.
    1. Re:Spoliers! by dykofone · · Score: 5, Funny
      You've obviously never taken any aerodynamics classes. The point of the spoiler isn't for traction, it goes along with the basic understanding that an airfoil will provide a significant horsepower increase. Your typical spoiler on a Civic will increase horsepower 40 to 60 percent.

      Take airplanes for instance. They need a large amount of thrust to get off the ground, so aircraft engineers went ahead and put TWO big airfoils on each side, as well as some smaller ones in back.

      It's all simple engineering really. Let me guess, you think that stickers are purely aesthetic, and don't serve their main purpose of abrateable heat sheilding during fast runs?

    2. Re:Spoliers! by Enigma_Man · · Score: 2, Informative

      You're all somewhat wrong. Spoilers create downforce at _any_ speeds, including 0 (more weight). It's only really appropriate at higher speeds though. An FWD car, while not up high on the list of "needs more downforce" (FWD cars usually understeer very terribly because the front wheels have so much force (and usually weight by design) on them), but any car will benefit from more downforce in the "able to stay on the road while turning" category.

      -Jesse

      --
      Nothing says "unprofessional job" like wrinkles in your duct tape.
    3. Re:Spoliers! by DogDude · · Score: 2, Funny

      You've obviously never taken any aerodynamics classes. The point of the spoiler isn't for traction, it goes along with the basic understanding that an airfoil will provide a significant horsepower increase. Your typical spoiler on a Civic will increase horsepower 40 to 60 percent.

      So, assuming that you have a Civic that will go 120 MPH +, how exactly does downward pressure on the back end accomplish adding horsepower? And I'm sorry, I only took a few college level physics classes, but from what I remember, air flow around a vehicle doesn't have shit to do with the amount of power the engine puts out.

      As someone who's also owned a car that could have used a spoiler, I always assumed that a spoiler added downward pressure on the back of the car, helping to maintain traction when accelerating rapidly. I've never, ever, ever, ever seen a Civic's back tires smoke. Ever.

      But more imporantly, how about providing a simple explination as to how a piece of plastic on the back of a car, in no way attached to the engine, increases the engine's output.

      --
      I don't respond to AC's.
    4. Re:Spoliers! by On+Lawn · · Score: 3, Informative
      I believe DogDude's point stands.

      DogDude didn't relay a point, other than he's ignorant of why people put spoilers on front wheel cars (As if the answer is different than rear wheel cars).

      One place you won't see "ricer" nonsense is on the drag racing track. But you will see wheelie bars and spoilers on front wheel cars.

      No, a front wheel car is not in danger of doing a wheelie, but the wheelie bars do help keep the front wheels from lifting and losing traction.

      From NHRA magazine (talking about the for-runner for the car pictured in the link)

      Bergenholtz earned his nickname when he and his brother, Ron, reinvented the wheelie bar and then broke the 10-second benchmark in the quarter-mile. Wheelie bars are like car training wheels. They trail behind a dragster, preventing it from tipping over backwards on launch. The Bergenholtz brothers put wheelie bars on their '89 Honda CRX - a front-wheel-drive car, which, by definition, cannot wheelie. On a front-wheel-drive car, the (now slightly misnomered) wheelie bars shift the center of gravity forward. They prevent the rear shocks from compressing at launch. This is, in fact, genius in its simplicity: Gain traction by planting the front end more firmly on the tarmac.


      Moral of the story? When someone complains he doesn't see a reason for something, that is not a point its an admition of ignorance.

      As to your point about caving in the rear deck, they can handle the weight of a 300lb person, at most denting the sheet metal. 300lb of downforce is quite a bit.

      That said, they are probably superflous on many cars. But I'm not going to go parading my ignorance by laughing at it. You never know.
    5. Re:Spoliers! by Osty · · Score: 5, Informative

      You're all somewhat wrong. Spoilers create downforce at _any_ speeds, including 0 (more weight). It's only really appropriate at higher speeds though. An FWD car, while not up high on the list of "needs more downforce" (FWD cars usually understeer very terribly because the front wheels have so much force (and usually weight by design) on them), but any car will benefit from more downforce in the "able to stay on the road while turning" category.

      You're also wrong, by the way. A spoiler doesn't create any downforce. A wing is used to create downforce (negative lift, as the wing is exactly the same areofoil shape as you'd find on an airplane, except inverted). A spoiler simply "spoils" the lift generated by the inherent shape of a car. A car is roughly shaped like an aerofoil (rounded on top, flat on the bottom), and thus at higher speeds it tends to generate lift. It's certainly not enough for your car to actually fly, but it is enough to reduce traction necessary for handling and braking. By spoiling that aerofoil shape, a spoiler lessens the natural lift generated by the body shape of a car. For most non-racing applications, a spoiler is all you need, and in most cases you don't even need that (most factory spoilers are indeed cosmetic -- why is it that a Chevy Cavalier needs a spoiler, while a C6 Corvette doesn't?).


      In a racing application, a simple spoiler is often not enough, however, and it doesn't really matter where your drive wheels are in that application. That's why you'll see touring cars like the Acura RSX or TSX, or the Mazda 6 with big wings in the Speed World Challenge races (and other touring car series). These are fully adjustable wings that generated downforce (the amount determined by the angle of attack, just as the amount of lift generated by an airplane is determined by its angle of attack). You simply do not need a big-ass wing like that outside of a full race car. That is why the ricers are silly for putting big ol' wings on their cars (well, aside from the facts that they suffer from "bigger is better" and "more is better" syndrome with huge and multi-level wings, and that 9 times out of 10 the wings they're buying are not fully adjustable, and that 10th time the wing isn't properly adjusted for the conditions).

    6. Re:Spoliers! by Enigma_Man · · Score: 2, Insightful

      When was the last time you needed 2 GHz to check your e-mail. When was the last time you needed a giant SUV to get a carton of milk? When was the last time you needed anything more than bare minimum to do anything?

      Personally, I hang out with a different crowd of people that actually does race their cars (on tracks, not the street like assholes), and I've seen many a car kick out the rear end around a corner (FWD or otherwise).

      The average joe doesn't need much more than bare minimum. But it's fun to go overboard sometimes, for that time when you do want to take it to a track.

      -Jesse

      --
      Nothing says "unprofessional job" like wrinkles in your duct tape.
    7. Re:Spoliers! by FXSTD · · Score: 2, Funny

      You forgot the thrust generated from the "fart can" style muffler. The rythmic pulse generated will induce a thrust coefficient similar to what a turbo would effect. Sure the sound is nice but the extra 50hp is the real gain. Tinted windows also reduce cabin temp allowing for increased ignition timing without detonation. Lets not forget how VTEC technology has brought hydraulic roller lifters into the spotlight. The reduced friction coupled with boost potential from the carbon fiber bling items have maximum rev potential.

    8. Re:Spoliers! by coyote_oww · · Score: 2, Insightful
      As someone who's owned cars with spoilers, I confirm that they do add downward pressure to the back of the car. The calculation for this is quite simple: if the spoiler weighs 15lbs, it adds 15lbs of downforce.

      Of course, you could put 15lbs of potatos in the trunk, and you'd get the same effect.

  9. Car annoyances by Profane+MuthaFucka · · Score: 3, Funny

    Is there a discussion of common car annoyances such as fart pipes, chain-link license plate frames, spoilers on family sedans, ill-fitting aftermarket plastic body kits, and drivers of any type of Pontiac?

    --
    Fascism trolls keeping me up every night. When I starts a preachin', he HITS ME WITH HIS REICH!
    1. Re:Car annoyances by ebooher · · Score: 2, Funny
      spoilers on family sedans, ill-fitting aftermarket plastic body kits, and drivers of any type of Pontiac?

      Man it's hilarious to see downforce spoilers/wings on front wheel drive cars. I may make a lot of people angry with this statement, but I can't help but laugh my white arse off when I see posers trying to lift their drive wheels off the ground. Absolutely hilarious.

      --
      "Genius may shine aloof and alone, like a star, but goodness is social, and it takes two men and God to make a Brother."
    2. Re:Car annoyances by Profane+MuthaFucka · · Score: 3, Funny

      Nothing is wrong with Pontiacs, except that they could lose all the plastic trim pieces, generally handle like dogs, and their owners actually think they're driving a car that's better than a Chevy.

      Not that there's anything wrong with an inexpensive un-fancy car. I drive one myself, but don't have any illusions about it. Europe has a similar phenomenon with people who drive Alfa Romeos. They are always weaving around in traffic, revving the engine, looking like morons, because when you get right down to it it's no better than a Fiat.

      --
      Fascism trolls keeping me up every night. When I starts a preachin', he HITS ME WITH HIS REICH!
    3. Re:Car annoyances by maddskillz · · Score: 2, Interesting

      It's more Toyota than Pontiac seems like an understatement. When I was talking to a Toyota salesman, he said the only GM part was the stereo. And of course you know car salesmen never lie!
      And I thought it was Yamaha that designed the engine

  10. What about the non-ricer? by Nick+of+NSTime · · Score: 4, Interesting

    I have a 2005 Dodge Magnum RT, so a lot of the ricer-type "upgrades" don't apply to my car. I need a balance of old-school stuff (bigger exhaust, cold air induction) with new-school stuff (reprogrammed PCM). Unfortunately, a lot of the upgrades for the Hemi engine in the Dodge Ram pickups don't work with the Hemi engine in my Magnum.

    So my question is, does this book cater to the pocket racer crowd or will I find any good information for my 347 cid hot rod station wagon?

    1. Re:What about the non-ricer? by Llarian · · Score: 2, Informative

      The simple fact is that in order to make your car faster, you need more air and more fuel. That's it.

      Learn how your particular engine works, its tolerances, and its choke points. Fuel is easy to add more of, especially in a fuel injected car. Bigger injectors and the ability to change your fuel curve and monitor the engine status will fix that.

      Air is harder. The MAF is often a choke point, as is the intake box. Throttle bodies will sometimes be an issue, although less so with the larger V-8 engines. For NA cars, you'll eventually need a stroker or something of that nature to get much more air (or adding forced induction).

      When push comes to shove, an engine is a simple thing. Its just a big air pump. Learn the basics of engine management, fuel injection and timing, and static/dynamic compression if you're looking at forced induction, and the rest of it is easy.

  11. Car mods for dummies by CRepetski · · Score: 2, Insightful

    IMHO, the majority of modded cars you see on the road are driven in a significantly more aggressive manner than unmodded ones. This seems to outweigh a slight improvement or reduction in safety by such mods. That said, perhaps learning about safety from a "for dummies" book is even more important in these cases?

  12. seems familiar by octal666 · · Score: 2, Funny

    For every knowledgeable enthusiast, there are many more misinformed or incorrect speculators whose opinions usually spring from personal preference or a need to hear themselves talk.

    I have nightmares about an unmodded slashdot...

    --
    DON'T PANIC
  13. For VW lovers, I recommend ... by Buran · · Score: 4, Informative

    VWVortex.com has some great discussion forums, although the main model-specific forums, especially the Golf/Jetta forums, are mostly full of "what rims should I get?" and suchlike, which is a shame because I keep finding that requests for actual help are buried under such junk. It's quite frustrating to check back a while after a request to find two pages of rim polls burying your post past the 1-3 pages most people bother to read. Some people resort to adding a photo to their post to get the camera icon next to their thread so people will open it even if the photo is unrelated to the help request.

    Then there are the large number of people who, frustrated by this and by the search function that seems to be totally incapable of actually finding anything, post a nice query that obviously took some time to set up, only to be greeted by people who post "Use the search" or screenshots of the forum software toolbar with huge arrows pointing to the search function ... which has probably already been tried, with no success.

    So, I recommend the forums, but use the more-specific forums for your problem ... although the sad fact still is that fewer people traffic those forums so you'll have to wait longer than you should for a real answer.

    1. Re:For VW lovers, I recommend ... by maddskillz · · Score: 2, Informative

      For what it's worth... TDIclub has great resources for modding TDI's (again, VW specific). Lots of really useful information on that, and not too many posers.
      Of course, you have to understand that you are trying to mod a 90 HP car that sounds like a tractor...not really cool with the in-crowd. But it takes a special person to "get" a diesel, and you can actually get some pretty descent performance out of it at the same time.

  14. colors... yellow in specific by ryane67 · · Score: 2, Funny

    the book's gotta say something about painting parts yellow to make your car go faster..

    --
    ?SYNTAX ERROR IN LINE 42
  15. So it's basically by OverlordQ · · Score: 4, Funny

    "A Dummys Guide to Ricing" instead of an O'Rielly "Car Computing"

    --
    Your hair look like poop, Bob! - Wanker.
  16. Obligatory diy-efi.org link by PsychoKiller · · Score: 2, Interesting

    www.diy-efi.org is a great source of information on GM vehicles. The guys there have reverse engineered many GM ecms and distribute their work for free.

    Right now I'm working on a GPL'd bin editor, and once that's done I'll be working on a PROM burner that works in Linux.

    Oh, I should add a link to www.moates.net as well, since he makes lots of cool stuff like PROM emulators and USB programmers. Craig's gonna kill me...

  17. Duh! Me by EmbeddedJanitor · · Score: 3, Funny
    So far the dummy books deal with non-lethal issues. The thought of encouraging a dummy-level person to dick with the steering, braking and engine of a lethal killing machine does not help one sleep well at night. I hope, but I doubt, that the book has only one page: "If you're a dummy then don't dick with your car!"

    --
    Engineering is the art of compromise.
  18. tuning potential by Anonymous Coward · · Score: 2, Funny

    I recently bought a high-performance automobile that has a reputation for its tuning potential

    you just got a new Minivan??? sweet!

  19. What about the... by PhraudulentOne · · Score: 2, Interesting

    Offroaders! We mod too.
    Jeep Enthusiasts!

    --
    You create your own reality - Leave mine to me.
  20. Fuel Efficiency by NardofDoom · · Score: 2, Interesting
    I'd love to mod my car, but to get better fuel efficiency, not to go fast and make loud noises.

    Unfortunately, there's no source for after-market parts or chips that can do this, which makes me sad.

    --
    You have two hands and one brain, so always code twice as much as you think!
    1. Re:Fuel Efficiency by TigerNut · · Score: 2
      When you tune your engine to go fast, you do it by improving the engine's volumetric efficiency. That typically means you'll burn more fuel (and air) than the original engine, but also make correspondingly increased power from a given engine displacement. If you combine that with gearing appropriate to your driving environment, you WILL get decent mileage, and be able to merge into traffic too. If you want to significantly increase your mileage, then you need to address waste heat, and you need to reduce the car's inertia.

      A turbocharger uses exhaust heat energy to drive an intake air compressor, and thereby recovers some of the 25 percent or more of the fuel's BTU content that goes straight out of the tailpipe. Typically the turbo configuration is sized towards the performance end of the spectrum, but if you pick a more street oriented compressor, you will improve the cruising efficiency compared to a naturally aspirated engine as well as having some serious power at your disposal when you put your foot in it. If you want to just increase your mileage, then drop the engine displacement when you install the turbo - your cruising mileage will be governed more-or-less by the engine size and configuration (number of cylinders, inline or vee, etc), and the peak power is determined by how much boost you run.

      The acceleration you can get from your car depends a lot on the rotational inertia of the various driveline parts. A lighter wheel/tire combination will reduce the rotating inertia so that you can spin everything up to speed more quickly. A lighter flywheel and clutch also contribute significantly to faster acceleration. Faster acceleration means you burn less gas while getting up to speed, so you will get better mileage especially around town. Reducing the weight of your car's body and interior will generally improve acceleration as well, but it also decreases the comfort level, so you'll be making a choice there between fast or cozy.

      --

      Less is more.

  21. High performance... by dj245 · · Score: 5, Funny
    I recently bought a high-performance automobile that has a reputation for its tuning potential.

    You've got the Civic DX too eh?

    --
    Even those who arrange and design shrubberies are under considerable economic stress at this period in history.
  22. Very knowledgable author :) by jstockdale · · Score: 5, Informative

    Wow, didn't see this one coming on Slashdot.

    About a year ago I delt with David at length while he was working for WORKS, a tuning shop in San Francisco. We were discussing the details of the power, handling, etc. modifications that they would be making to my Mitsubishi Evolution (the car they in which they specialize). For the entire time I delt with David (before he left WORKS to pursue other things, like the book) I was consistantly impressed by his comprehensive knoweledge of both the technical and legal aspects of vehical modifications (especially impressive in good ole California thanks to strict emission standards).

    His expertise and professionalism have resulted in him gaining much respect within the Evolution community, and although I have not yet had a chance to review his book, if it's anything like the conversations I've had with him, you'll be amazed by just how far car tuning has come.

    Before talking with him, I didn't think it was safely possible to take a $32000 car, $7k of tuning, and end up just a hair short of a supercar*. Amazing.

    Hope the book sells well.

    -S ...

    * by which I mean a 2.0L 340hp 4WD beast that sprints from 0-60 in 4.4 seconds, skidpad tests to 1g, and through the twisties can out perform anything short of a 911 Turbo

    --
    **AA: a bunch of mindless jerks who'll be the first against the wall when the revolution comes
  23. Arm chair car mechanics by nolife · · Score: 4, Insightful

    For every knowledgeable enthusiast, there are many more misinformed or incorrect speculators whose opinions usually spring from personal preference or a need to hear themselves talk.

    The whole reason for test and tune day at the track.

    That grouping can be catorigized into two types of people. Those that actually race and those that do not. People have many different goals when it comes to building a car: looks, straight line speed, handling, and durability and almost always some mixture of each. With that, you get different opinions on what works and what does not.

    There is some gray area.. Examples.. Some people remove the cooling water supply from the throttle body on cars so equiped. Some think it heats up the incoming air to much and others think it is required to cool the throttle body. Another one. At a 1/4 or 1/8 mile track, many people are pushing their cars to the line and apply ice to the intake, others run it to the line and have the car at normal operating temperature. For some, the colder denser air seems to be an advantage, for others, having the temperatures in the normal range puts the cars computer in a closed loop and running at its peak as it is not compensating for lower temperatures (retarded timing, incease in idle, higher or lower fuel/air ratio etc...) Each of these examples are really effected by what else the person has on the car and some are opinions. The actual indicator of advantage is the clocks time.

    My point..
    The people that actually race the car and can compare before and after times are the only ones that really know the true effect of a modification. 10 degrees advanced timing or 15 degrees? You will only know the true difference between the two on a track with a timer. Optimum tire pressure for your tire and suspension setup? Who the hell really knows without repeated timed laps.
    People that NEVER go to an actual track or an event are not the ones you want to blindly take advice from, those are probably the same people that put a new muffler on the car and swear they can actually feel the difference. I doubt anyone in the world can actually feel the difference between a real world difference of .01 to .1 seconds in a 1/4 mile let alone from one stop sign to the third telephone poll.

    The time clock should be treated the same as running a doom3 timed demo after changing your memory timings. Does it just feel faster or do you have something indicated to back it up? That can seperate FUD from speculation.

    --
    Bad boys rape our young girls but Violet gives willingly.
  24. Natural fit by digitalhermit · · Score: 5, Interesting

    Man, I've been a computer geek all my life. Recently I've started playing around with cars (got a couple non-turbo 3000GTs and a VR-4 coming next week). It's a tremendous amount of fun... As with the computer groups, there are a bunch of newbie folks and those in it just for the image... but for every ten of those there seems to be one or two knowledgeable folks.

    I'm the first to admit that I know very little about modern cars. Just as with computers, however, there are things that seem to make sense but can be bad for your cars. I'm still in the fix it stage -- trying to put a car back to complete stock condition. It's almost like restoring an old Atari ST or Amiga to full functionality. E.g., the other day it took me a couple hours to change the front fog lights. The bolts had frozen up and grime had covered one of the screw holes so it wasn't immediately obvious how to remove them. After lots of cleaning I got them off, changed the bulbs, and got the housings repainted. The second time around it was a fifteen minute job. So, like learning some weird bash shell construct or new awk script, it was satisfying.

  25. No. by DG · · Score: 4, Informative

    Disclaimer: I'm a race car engineer. I make race cars go faster. It's my day job.

    If we work under the assumption that the wing in question actually produces signifigant downforce (not a trivial assumption, given the typical aluminum extrusion pretending to be a wing from most rice shops) the download generated by the wing will be borne by all 4 tires.

    Depending on a number of parameters, the rears may carry a larger share of that download, but the net effect will be increased normal force on the front tires, which in turn increases grip.

    Now if our boy was smart enough to use a real airfoil on his wing, he was probably smart enough to fit a front airdam and splitter, which means he probably has way more FRONT downforce than rear, and is probably using the wing to help balance out a high-speed oversteer condition. On production-based cars, building front downforce is much easier than building rear downforce.

    DG

    --
    Want to learn about race cars? Read my Book
  26. For air-cooled VWs... (overclocking a putt-putt) by sczimme · · Score: 2, Interesting

    the best place to start might be the local car club. The folks in the club can direct you to race tracks that have a fairly large VW contingent. Go to these tracks and talk to people - drivers and builders - in the pits (but don't be a nuisance).

    Years ago I was fortunate enough to find a VW shop run by a) a close-to-retirement gentleman who had everything and knew everything and b) his assistant who drag-raced VWs professionally (i.e. for money). Through them I bought an engine w/ the following specs:

    1835cc (stock is 1585cc, also called a 1600)

    044 heads, 40mm intake and 25mm exhaust [stainless] valves with high-RPM valve springs

    an Engle 120 cam, 294 degrees duration and .435" lift

    a pair of Weber 48IDA carburetors, velocity stacks only - no air filters (I was young+stupid but it seemed like a good idea at the time)
    The carbs, heads, and cam worked together to make rather a lot of midrange to top end power. I ran a 16.65 quarter mile but had trouble getting first and second gear to hook up. (The tires were 195/50-15 street radials.)

    Anyway, the point - besides a bit of bragging about my old car :-) - is that a book might help in certain areas, but the real in-depth knowledge usually comes from people who are already doing what you want to do. These folks can help you be sure the whole will be better than the sum of the parts, or at least that the individual parts will work together satisfactorily.

    --
    I want to drag this out as long as possible. Bring me my protractor.
  27. Cosmetics? by superdan2k · · Score: 2, Funny

    That whole chapter should have been nothing more than a warning regarding the "Gay Batmobile Effect"...which can only be explained by example. In this case, the example is a kid who lived not far from my now-ex-girlfriend when I lived out in Philly.

    Specifically, a Hydundai Tiburon. Metalflake purple, with ground effects. Gold rims. Big non-functional scoop on the hood. Type-R stickers everywhere. And two -- yes, two spoilers, stacked one on top of the other. Some sort of bad airbrush art on the hood. When I first saw the thing, my first words, were, "Jesus Christ! It's the Gay Batmobile!"

    --
    blog |
  28. "Sticker-Charging" -- The missing chapter! by JonTurner · · Score: 2, Funny

    >>Does the book cover proper application of Type R decals?

    Somehow this critical chapter was left out... editors these days! (sigh)

    Addendum.
    Chapter 31: "Sticker-charging" your Rice Rocket
    Subtitled: If you can't go fast, make up for it by looking silly.

    To increase the co-efficient of drag, add weight, reduce ETs and gain street cred with your peeps consider plastering your POS ragged-out pathetic bomb of an economy car with stickers. More is better, especially on four-door models. Our testing has found that stickers containing deliberate misspellings or pictographic words in an Asian lauguage you cannot speak are of particular, uh, "value."
    (End of chapter)

  29. DIY is good by Gordonjcp · · Score: 2, Interesting
    Well-maintained older cars actually produce less pollution than a lot of newer cars. Strange but true (hint - the stuff from catalytic converters is incredibly nasty, the stuff from non-cat is less nasty but there's more of it). Plus, they're easy to work on, parts are cheap, and you can always get good used expensive bits from the scrapyard.


    If you put your car into a "Kwik-fit" type place for an oil change (£15 oil change offers are pretty common in tyre and exhaust centres round here) then that is all they will do - change the oil. No oil filter (or a cheap shitty one if you're lucky), and the cheapest, crappiest oil they can get away with. Now, I use fairly expensive oil (about a tenner a gallon), and real, genuine, Citroen-approved Purflux filters, which costs me about £15-£20 (I don't know exactly, because I usually wait until I need about £100-worth of stuff for various jobs and buy the lot all at once). It takes about 30 minutes of actual work to change the oil (I take the oil and filter off, let it drain for an hour or so while I clean the car, then refit the plug and filter and fill up again). Half an hour and twenty quid, and I know the job's done *right*. Same thing with the hydraulic system - every 10,000 miles (should be 30,000 but the oil was very gunky when I got the car), out goes the shitty old stuff and in goes a gallon of fresh, green LHM. Next time I'm going to bleed the brakes and steering block, because I didn't do that last time, so it'll take about an afternoon, but once again I'll know it's done properly.


    There's something very satisfying about knowing you can fix very nearly any problem that crops up with your car...

  30. Physics behind the FWD wheelie bars by DG · · Score: 2, Interesting

    Actually, there's some pretty sound physics behind those wheelie bars on FWD drag cars.

    The amount of rearward weight transfer is a function of CG height, wheelbase and longnitudnal acceleration amount - that's it.

    The resultant pitch ANGLE that the sprung mass adopts as a result of the weight transfer is a function of weight transfer, pitch stiffness (driven primarily by spring rate) and jacking geometry (anti-squat) and you'd be suprised how many people confuse pitch angle with weight transfer.... anyway...

    The amount of grip produced by a tire is a function of the normal load on it - more load, more grip - and when accelerating, weight is transfered rearward, reducing the grip on the fronts and increasing the grip on the rears. If you are a FWD, this is bad news, as the harder you accelerate, the more weight you lose from your drive weheels, the less grip you get.

    You can change springs all day, and you can't change this fact. You CAN change the pitch angle, but not the weight transfer amount.

    But by attaching wheelie bars, when the bars contact the ground the wheelbase lengthens - and a longer wheelbase actually REDUCES the amount of rearward weight transfer. Tada! Magic!

    Where some cars were getting into trouble though is that the wheelie bars tend to be pretty close together, which give a narrow track width - the analogue of wheelbase, but in roll. The front tires, being low pressure slicks, are very soft in roll as well. So if something happened to induce a roll movement (like a steering input) there was very little force to oppose the roll, and the car would suddenly hook in a random direction. VERY directionally unstable. Much more exciting for the driver than is probably healthy.

    DG

    --
    Want to learn about race cars? Read my Book