ILOVEGIRLS

why do ppl lower the compression when they boot? ive heard that the higher the compression..you make more hp at lower boost.

TurboInteg95

the thing with high compression motors is tuning is critical and there's also a point where race gas will be needed. Low compression motors are more forgiving to poor tuning and poon gas.

b18bturbo

turbointeg is totally correct in what he states. If you can tune and have a good standalone i would build a 10.5:1 compression turbo motor. But for the avg guy i would stay around 9:1 and be really safe.

BowSeR

yeah im running 10:1 compression in my built motor. but i make sure my a/f is good also tuning is a key with higher comp

1FastLS

When you guys say tuning, what exactly do you guys mean? What equipment are you guys using?

TurboInteg95

I mean a dyno with a wideband o2 hooked up and some kind of programmable fuel computer.

1FastLS

So a any high compression Turbo will need a dyno?
So you can't run built high compression (10:1) turbo car with just stock injectors, stock computer, MSD, and FMU at 7-10lbs? I'm kinda new at this so please bare with me.

VaporTrail

not a flame, but try searching our forums, we have vast amounts of topics on this very same subject.