Quote:
Originally Posted by cozykat
As I understand, 8/8.5:1 compression may be boost friendlier but it will effect my low-end torque more. I think our more technical members could better explain why than myself. I want more power and higher-end torque without sacrificing a lot of my low-end torque. OT, Shaun, and a couple of STI (one EVO) guys seem to agree that dropping to 9:1 is a good medium for our engines. It will only decrease the stock 230bhp by ~4% (or ~9bhp) and I probably will not notice since the block will be bored, have head work, etc to improve flow.
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FWIW I'm running 8.5:1 in my 2.2L turbo impreza, and it has more bottom end torque than my 9.5:1 stock RS25, despite having 300cc less displacement.
With your standalone, you'll be able to ramp up ignition timing for low RPM/off boost driving with the low compression, which mostly makes up for it.