The engine is a forged 383 force fed by a PT88. What is the best injectors for this application?

 

What's your realistic engine HP target?
and are you changing the fuel pressure? or sticking with the stock 43.5psi.

 

HP is going as high as I can get it without killing myself and yea the pressure is going to be going up quite a bit.

 

lol given that vague of an answer the size you want is, "as big as possible/lbs per minute"...

 

I was thinking around mid 900s TOPS. That will probably be the absolute max I will ever see(I'd rather over estimate my power output than underestimate it). I was thinking around 96# injectors?

 

"mid 900's" at the flywheel or at the rear wheels? If at the rear wheels, what is the drivetrain?

If the fuel pressure is "going up quite a bit"..... you need to pick a value, so the injector flow rate can be converted to the pressure the injector was rated at to the new pressure. Pressure will also determine the type of injector you need.

 

Based on a typical brake specific fuel comsumption of .625 for turbocharged engines, and running under an 80% duty cycle, you'll need roughly 88lbs/min @3bar fuel pressure, and 76lbs/min @4bar to achieve 900hp.

You'll need low impedance injectors and something to drive them... but yeah 96 sounds good to allow plenty of overhead.

 

I'm new to the whole fuel part of things so I need alot of help. The car is a 94 firebird with a 383 stroker, 8.5 to 1 CR, PT88, 1.80 gear glide, 4.56 gears, cam is still undecided, new ecm is also undecided but was thinking about the F.A.S.T. XFI. Any input is helpful at this point cuz this is where I'm lost

 

I use an Electromotive system for engine management on my race car and I like it a lot. It's what I recommend.

Rich

 

I'm liking all the features it provides. Could you help me out and give me a list of the parts and part numbers I would need to use this system on my LT1? Also where would be a place I could get this programmed at?

 

It would be best to call them or a dealer. As far as tuning, if you can tune one EFI system, you can tune another (well, that's oversimplifying, but just a bit). But anyone who does EFI tuning can do it.

Rich

 

Thanks for the help Rich.