You really don't know how a car works, do you...
Tires are a certain size. Gears have so many teeth. The engine turns, the wheels turn. There is a mathematical ratio between your engine RPM's and your speed. However this device limits your speed, I can garuntee it doesn't do it by changing that ratio. 90mph will occur at "x" RPM's if you have or do not have this device installed.
Also, your question is neglecting the fact that if this method were implemented, the traffic on that Chicago freeway would be traveling at 55mph and setting your cruise control at 90 would be foolish. You would suddenly be a very fast moving fish in a slow moving stream. The idea behind this is to STOP people from speeding. Even IF it could blow the engine, it would only do this while you are SPEEDING, thus it did its job.
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You really don't know how a car works, do you... Tires are a certain size. Gears have so many teeth. The engine turns, the wheels turn. There is a mathematical ratio between your engine RPM's and your speed. However this device limits your speed, I can garuntee it doesn't do it by changing that ratio. 90mph will occur at "x" RPM's if you have or do not have this device installed. Also, your question is neglecting the fact that if this method were implemented, the traffic on that Chicago freeway would be traveling at 55mph and setting your cruise control at 90 would be foolish. You would suddenly be a very fast moving fish in a slow moving stream. The idea behind this is to STOP people from speeding. Even IF it could blow the engine, it would only do this while you are SPEEDING, thus it did its job.