you cant break it down like that. unless if you try running both motors n/a first i guess.



but i mean if you take a stock port at 10psi and compare it to a street port at 10psi....yea the street port should make more (depending on the turbo you're using and a bunch of other factors.) but the turbo itself you cant say is adding the power, unless like i said maybe you make both engines n/a first to set a baseline or something.



the port will affect the spool time considerably tho.



but anyway its not like you can say "hmm i have 150hp with 5 psi...so if i go to 10psi i'll have 200hp" it just doesnt work like that, everything depends on other factors.



kevin.

weird question, i should know it, but don't.



take stock port FD engine with say a T78, what is the rpm's where the turbo finally spools?



take same turbo, with same mods, and add streetport. would it spool later on??



does it all depend on the tuning/tuners settings? or would it be pretty much the same for both ports with the same turbo, etc?

thats a good question

i think it probably spool quiker at lower rpm

bout th efinal spool maybe affected

im just guessing here !!

If the exaust is ported right you can create more of a pop as the port opens that will cause the turbo to spool faster... It will also spool faster because more air in = more exaust out = faster spooling of the turbo = more air in.... It's an endless cycle I tell ya...



you should go rumage around in the single turbo forum and you should be able to dig up some good facts on turbo's and how they work and what works best on rotary's for different situations, ports etc...

Thanks. I know turbo's spool off of exhaust pressure, but just was not sure of a stock port vs. street port block.