hmmm, why??

[madking411]

do people get these engines, and then lower the compression on them....and then put turbos on which gives SOOO much more compression than wat it would be if they had just left it normally??

i mean, sure, if you left the compression fairly high, the way it is, u wouldnt be able to run as much boost, but why boost it ssoooo much and then have the compression be so low?
instead of leaving compression high, and then boosting just a little? wouldnt the pressure still be fairly equal?

[PhatRoyale]

More boost = more power
More power = more fun
More fun = better

[madking411]

yeahhh, i know that...but what im sayin is, if u get more boost, etc. then why not just leave the original high comp. ratio and add boost to THAT? instead of lowering it (NA) and then making it wayyyyyy higher (turbo)??

[lRolLlLilN]

yeah. i think you might have answered your own question.. but you lower compression to alow room for more boost.. which in turn would allow more power as opposed to high compression with little boost.. you wouldn't get as much power..

[punter]

Because blacktops and 2zz's and the like (11:1 comp) are so close to detonating as is, adding any forced induction can prove very difficult, and due to the light weight nature of a high performance N/A engine you're limited as to the total power.

When someone lowers the compression they typically fit stronger pistons (and rods) to do it, making a stronger engine, thus more power potential.

High comp turbos are good, but they need to be built and tuned properly. In resctricted turbo classes increasing comp
is a great way to find more power (about 10:1 is the highest i've seen)

[Bitter]

because with a lower CR you can actually stuff more air into the engine than with a higher CR.

[w203]

Its mainly because of tuning. A FI high compression ratio motor has a higher margin of error in tuning to produce good numbers then a lower compressioned FI motor.

[w203]

Next time make a better more descriptive title so others can search for it.