NJNETSFAN

iTrader: (15)

Just did a h/c swap on an 02 ls1 and I haven't got it tuned yet. I don't plan on running the motor past ~6500 rpm, but I know the stock injectors will be nearly maxed out...what kinda of power are people making on stock injectors?

khaotic

iTrader: (2)

Not sure if this is any help

BSFC = brake specific fuel comsumption so take

0.5 x 400hp / 8 = 25lbs injector minumum
0.6 x 400hp / 8 = 30lbs injector minumum
use a safety margin of 20% to those numbers so just take the .5 or .6 and estimated Hp divide by number of cyclinders and will give you injector needed hope some else chims in also.

Or their are many calculators on this site to select right injectors needed for what HP.

WeathermanShawn

iTrader: (1)

You might be really close to maxing out those injectors if you plan on hitting 6200+ Rpm's for any 'extended' period of time.

A lot depends on your H/C VE's and your Commanded AFR at WOT. A few tricks to stretch those injectors might be to use some tuning software and dial WOT as reasonable lean (safely) as possible.

I still run the stock injectors with H/C, but I am only being saved by the altitude I normally operate at. I hit ~85% at 6500 Rpm's. But, at your elevation I would need more injector.

You can run some software to estimate your injector needs, but I would 'guess' you might be very close to maxing 28.8's out.

..WeathermanShawn..

shoemike

iTrader: (25)

My car had 460hp/450tq with stock injectors and a hacked up tune.

Mike@ZMS

iTrader: (10)

Doesn't make it right.

Schwanke Engines

iTrader: (1)

28.8*8/.5 = 460.8hp @ 100% duty cycle

shoemike

iTrader: (25)

Didn't say it was.
FWIW DC was 80-85%,
with the tune screwed.

ramairJP

iTrader: (3)

I have 26 Lb injectors, but with full bolt-ons (~360 rwhp) I am at 90% duty cycle with a WOT AFR of 12.8 @ 6200 rpms. Calculating that out to 28.8s at 100% would be roughly 445hp at the same VE (which will improve with h/c).

slt200mph

iTrader: (42)

452/418 at the wheels on 28.8 injectors ..... a DD and it has run perfect for the last 65,000 miles ...

NJNETSFAN

iTrader: (15)

got it tuned...injectors are at 110%....I was advised not to drag race the car until I get better injectors. I may throw a wideband on it, and make a pass or 2 and see if it leans out.

Phil'sC5vette

iTrader: (4)

I had 425 RWHP and at WOT my 28.8 injectors were over 100%

I changed to 30# fords, added a FAST 90/90, improved my tune and set up by 25 RWHP and 30 RWTQ and I rarely get passed 85%.