Ok I have read this Clicky

I have questions about it...

In HPT my IC from the factory is 0.17800. I want to do the math for my new injectors but I need more info on the factory fuel system. What CC were my factory injectors? What was my factory fuel pressure?

My new injectors are RC 750cc. They are rated at 43.5psi like most injectors. Are the factory injectors rated at the same 43.5psi? I will most likely be running my fuel between 45 and 50 PSI. So I will need to go do even more math first to get what those RC750s will really be spraying to get the correct IC.

Stuff about my car...

Hahn Stage 2 however I am using HPT to tune and ridding myself of the BEGI FMU.
Wiseco 8.9:1, eagle rods, gm racing valve train, 750cc injectors, As much boost as that 16G can push out, Turbo XS RFL.

Darryn

2004 Cavalier coupe, 5 speed, White
GO
Hahn Stage 2, Eagle rods, Wiseco 8.9, SS Valves, Dual valve springs, valve job, Ti seats and retainers
spec stage 3, Fidanza 7.5lb flywheel, Short Shifter
Slotted and dimpled rotors, EBC green stuff
SHOW
VIS EVO CF hood, KOBE KAM 5 17", Nexxen N3000, Ebay Black tails and filler, 5% tint
Gold line springs, Tokiko D-spec struts
ELECTRONICS
Kenwood in-dash DVD and Navigation, single Kicker CompVR
http://www.cardomain.com/ride/2974835

0.05981 is what I got for my new injector constant. Does any one else have one this low? Would the best thing to do be to flash this one and see how she runs then tweak it from there?

Thank You

Darryn

2004 Cavalier coupe, 5 speed, White
GO
Hahn Stage 2, Eagle rods, Wiseco 8.9, SS Valves, Dual valve springs, valve job, Ti seats and retainers
spec stage 3, Fidanza 7.5lb flywheel, Short Shifter
Slotted and dimpled rotors, EBC green stuff
SHOW
VIS EVO CF hood, KOBE KAM 5 17", Nexxen N3000, Ebay Black tails and filler, 5% tint
Gold line springs, Tokiko D-spec struts
ELECTRONICS
Kenwood in-dash DVD and Navigation, single Kicker CompVR
http://www.cardomain.com/ride/2974835

You can't really go by that calculation. In reality you're going to keep adjusting it until it's where you like it. Some people tune the injector constant so that when tuning VE you just get to max values at the peak rpm and throttle position, otherwise you can tune it to a point where your car idles are 14.8-15.3ish so your deceleration and idle tables remain just as they were stock. It's up to you, but don't rely on that calculation. After a bunch of fiddling with mine with my 44lb injectors I'm at about 0.127-0.125, whereas the calculation gave me like 0.89 or something like that. Trial and error, good luck.



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