Injector Question

[JonTurpening]

I had taken a customers car to my local dyno shop about a month ago. The only thing that was done to the car was that it had a t3t4 50 trim turbo on it and a Walbro 255lph fuel pump with a safc 2. The tuner had recommended 480cc injectors for it. So after we got to the dyno and put the car on, it was running way lean. Now the car did have some problems with the valve timing solenoid so we couldn't get a full tune. Anyway when we had it on the dyno the tuner told me that he had wished he had recommended BIGGER injectors. 550cc or so.

Now my question is about my car. Let me give a list of my mods.

Jun style intake manifold

90mm throttle body

ss top mount exhaust manifold

Top fed low impendence 780cc injectors

fuel pressure regulator

walbro 255lph hp fuel pump

Garrett GT3582RL turbocharger

front mount intercooler

z32 maf

3" turbo back exhaust

safc 2

sitc

My question is should I get smaller injectors. He is recommending 550cc injectors for my set up. Does this sound right?

I do plan on taking the motor back out this fall and building it. I.E. rods, pistons, cams...etc...

I’m also trying to get my hands on a power fc but for now I would rather just run the safc2 and the sitc.

Any advice would be greatly appreciated.

Thanks guys,

Jon

[paulr33]

the safc wont run larger injectors so youll need a stand alone or a remap to suit the larger injectors

550cc is probably fine for the power you are making but if you have the 780cc's in there already - why not just leave them in there ?

[JonTurpening]

That’s my thoughts. Not to sure about the tuners logic.

Do you have any advice on a good stand alone? I've been looking at this one

http://www.linkecu.com/products/engine-man...-In/gts-r32-r33

but I don't know anyone who's used it.

the safc wont run larger injectors so youll need a stand alone or a remap to suit the larger injectors

550cc is probably fine for the power you are making but if you have the 780cc's in there already - why not just leave them in there ?

Edited December 15, 2007 by JonTurpening

[Blue_GTR]

If you can afford it, I would go Autronic SM2 or SM4. I hear good things about link ecu also, all comes down to what software/ECU's your tuner is familiar with.