compression ratio?

[mattbrye]

Everyone is saying an Ls integra is the best to turbo b/c of the lower compression ratio....how does that work? I dont understand what compression ratio really is..and please explain also why one is better for a turbo and the other is not..thanks this will help alot.

[TEAM KLR]

compression ratio is how much the pistons compress the fuel and air when they come to TDC "top dead center" the higher the comp the more power, with a forced induction set up the turbo or supercharger effectivley increases the compression. in racing applicatoins you typically go with low compression 7 or 8 to 1 comp and crank the boost way up, street applications we have found that you are better to go alittle higher and run less boost.