i have a turbo'd 93 civic ex D16Z6 (turbo T3/T4 hybrid) and i would like to run 15lbs boost but the ? is what kinda horse power will i make if i had 750cc injector or if i had 440cc whats the diff. in amount of HP i will make or 1/4 mile time ect... anyone plz help is it worth spending more for 750cc or should i go with 440cc ??

 

You don't just stick the injectors in, you need to tune the setup after you're finished. Assuming you don't run out of fuel with the 440's (which I doubt you would), both setups should make virtually identical power if tuned properly.

By the way, this question belongs in the Forced Induction forum.

 

when you say tune how would i go about tuning it take it to a dyno and have some guy or can i tune it myself some way???

 

Since you seem to have a limited knowledge of this sort of thing (and I don't mean that in a derogatory way), you should take it to an experienced tuner. You will also need some form of tunable engine management.

 

15 psi on a stock engine... probably need really good tuning.