I have a 1990 Gtu N/A with a full exhuste and streetport, and many other mods. but i want a little more go, but there really is nothing i could do to get more horse power with out a turbo or supercharger. i looked in to supercharging but i came to the conclusion that it was way to inefficent. so puting a turbo on my n/a was the best way I have found next to doing the complete turbo2 swap. i found a shop is south florida where the manager has a N/A motor with a turbo upper and lower intake maniflods, a stock turbo, manifold, FMIC, Greddy elbo, and a Haltec ecu. I will be doing the same thing but insted of the new ecu i an going to use a S-AFC to control the air to fuel. what do you guys think can it be done? How much boost can i run? Please let my know what you think.
i have most of the parts on the way here is a list.

Jspec S5 turbo
S5 upper and lower intake manifolds
stock maniflod
hks turbo timer type 0
turbo xs boost controler
turbo xs BOV
Apexi S-AFC II

Still need
FMIC
550 injectors
fuel/boost cut defender

 

My guess is prolly 5 or 6 psi. I'm sayin that because of the high compression rotors. Someone on here must know more then me because I'm still kinda new to this. Good luck!

 

Ya might want to search abit since this has been covered over and over. Probably going to need bigger injectors than 550s and a walbro of FD fuel pump too.

 

i was running my S4 N/A turbo at 10psi on an fairly stock t2 fuel/ignition map on my microtech. you can run as much boost as you want, just make sure you tune it right.

 

Look at Aaron Cake's site. This topic has been beaten to death. When he chimes in, this thread will be closed. I think it was aaroncake.net or somthing.

 

i have an fd fuel pump on the car. i am going too run 10psi and then try to tune it the best we can. Please keep the comments coming they are very helpful to the progress of my car thanks for the help.

 

Search honestly, this has been gone over nearly 5000 thousand times. All the information you'll need would be there.

or

http://www.aaroncake.net

or

http://www.teamfc3s.org/forum/showth...threadid=37694

 

the last link is my car

 

what did you use to get the parts so clean. some kind of Aluminum polish? let me know how because i want to do the same. and one other question the front cover, do i still need to do all that even on an s5 because the guy i talked to never said any thing about messing with the front cover. if you could fill me in alittle more about that it would be greatly Appreciated.

 

those manifolds are polished to a fine mirror finish. it took alot of sand paper and a LOT of time. you just use progressivly finer sand papers then use a polish at the end.

as for the front cover. you CAN do it different ways. i know alot of people will just weld a bung onto the oil pan and route the return to that, but i was going for as little fab work as possible. if you do use a T2 front cover, be sure to get a S5 one so you can still use your OMP

 

yep done before, search myname on here for my old thread and my new thread