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Old 11-16-2012   #11
Halon
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Join Date: Nov 2003
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Re: Does higher compression ratio raise TQ off boost?

I don't have a ton of first hand experience, but the theory I've basically accepted is:
- It does increase off-boost torque
- It does not affect spool (or not enough to really notice)
- It will make the car feel as if it's spooling quicker because of the increased off-boost torque/response, but if full spool was at 4k RPM at the lower CR, it will likely still be 4k. You'll just get to 4k quicker because of the increased off-boost torque.
- More power at the same boost level, if done properly.


Also the other thing that I'm learning a lot about on the 2JZ platform that I rarely ever heard with the 4G63 platform, is to consider quench area is as ideal as possible. I'm not an expert what so ever, but I've heard some individuals whom I'd consider to be experts, say that quench pad area/design should be as important and thought out as CR is when building a motor.
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