OK well i am in the process of building up my 88 TII, I will start with telling you what kindof parts i am using.

I have a T70 turbo and a stainless steel turbo manifold, 50mm wastegate, fmic, the motor will be freshly rebuilt with a moderate street port, 3" downpipe presilencer and 3"catback. I also have a walboro fuel pump and an hks pfc fcon. Which will handle between 10-14 psi. All emissions have been removed. My question is what size (primary, and secondary) injectors will i need to support that boost?

 

get 1 big motec injector, 3000cc!



um i'd think 550/1000 would be good, or 4 x 720's

 

i have Two 720's that were going to be used as primary's and i have two 850's that i was going to use as secondarys, do you think that is enough fuel? Also what kindof hoursepower numbers can i expect to see with my setup?I am also putting in a 12 pound atc flywheel, and a street-strip clutch.

 

@14psi it should be making 350-360 at the flywheel.



those injectors should be good for around 340ish hp



these are approximate #'s too....

 

Sweet, eventually i want to go with a standalone, but considering its my first turbo RX7 i think this set up is just fine, so with those injectors i should make good power without running lean? also i will not be running a steady 14psi i will be somewhere in the 10-12 range. I am also going to run water injection to be on the safe side. What is a good fuel pressure regulator to use with my set up? Like i said i am still learning things as i go, this is my first turbo car and i have plenty of questions. thanks for you help

 

You need a standalone. I dont think you will be using those injectors to capacity, and you will have problems.

 

Ronin speaks true.

 

so what can i do? can i just run low boost on the stock injectors. Like i said i Have an HKS Pfc Fcon which is a piggy back fuel computer.u still dont think i will be ok with that wired in.

 

^^^^^^^^

 

people have run an fcon with a full t4 before, in fact theres even a chip for it. i think its doable if you're running under 10psi, but its not really the best or safest setup around