Originally posted by luti
Wow, you guys seemed to have it all figurued out, except one thing. Running higher boost wont make you faster if you have a higher compression ratio to start. These numbers arent accurate so don't complain, but heres an example. If you have a 10.6:1 compression ratio with a turbo on 10lbs you'd be pumping out the equivalent of a 10.1:1 with 12lbs of boost. The advantage to starting with a higher compression ratio means you can run your turbo at lower boost, or have a quicker spooling turbo, in effect making your car faster. Also, C5's, expensive as they are (and yes I agree, they are a waste) can be turbo'd safely, just tune it. But, I would hope anyone spending the amount of money required to install a C5 into a hatch and then turbo it would also spend the extra money with a Hondata (stage 3??) and a knowledgable man on a dyno making it run right.
higher compression pistons spooling turbos faster is a myth. i mean if youre gonna turbo 6lbs of boost. why not just stick with a supercharger? on 10:1 ratio you wouldnt want to run more than 7 psi. anything more than that is pretty unsafe. unless youre runnin race fuel. (a little over exaggeration)
if you dont believe me then look at the pro's that run big ass turbos. they run the big turbos with bigger boost cause on the high end bigger boost is better.