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Last I checked, a combustion engine practically can't get above 50% efficiency.
The limit is actually 42%, Carnot Principle. In reality they are around 19%

I guess turbochargers don't follow that principle. Mercedes recently broke 50% efficiency for their F1 engine, albeit not in race-like conditions.

https://www.autosport.com/f1/news/131772/mercedes-engine-hits-remarkable-dyno-target

the 100kg/hr fuel flow rate limiting is why all teams are well below 15K RPM and they sound like glorified Weed Eaters. The FIA have been working to enhance the sound with changing the exhaust note using a megaphone exhaust pipe. http://www.autosport.com/news/...

I've been watching F1 since the 1970s and this is the most boring, lifeless, set of machines I've seen.

Microsoft running cars electronics, already happening... (I shudder at the thought)...

http://www.autosport.com/news/report.php/id/55980
or for more PR
http://www.microsoft.com/presspass/press/2006/dec06/12-11FIAPR.mspx

Approved use of commercial embedded technology brings innovation to motor racing

The FIA approved the use of programmable electronics, or embedded systems, to aid the driver in Formula One racing, subject to exact traceability of the source code.

2. Software validation:
All computer systems on board the car, or which can be connected to the car, have to be validated before they can be used at an Event.

The software validation involves a complete check of all the source code of the computer programmes, including off-car units, to ensure that all aspects of the software comply with the Technical Regulations. The programmes are then copied and held by the FIA. Subsequently, when programmes are uploaded at race meetings they are compared with the reference copy to ensure no changes to the approved software have been made.

If a Team wishes to make changes to the software during the season a re-inspection has to take place prior to use.

When programmes are uploaded at a race meeting the copies are kept by the FIA indefinitely. The copies, which are kept, may be inspected in detail at anytime, including after the season has finished.

In addition to this all hardware has to be inspected and documented in order that all changes can be monitored during the season.

plus, occasionally,
Guardian Weekend (who don't seem to have a specific site)
Esquire

Fundamentally, though, I want well-written, beautifully illustrated stories about fast cars and I'm happy! I don't ask for much :-)