anyone know how much hp i would get if i go from 18pd fuel injecters to 24pd injecter

[ford460bigblock]

anyone know how much hp i would get if i go from 18pd fuel injecters to 24pd injecter

[TatII]

injectors alone won't get you more power. what else have you done to the car? you have a big block v8? so thats goin from around a 18lb which is around 189cc x 8 =1512 total cc which is good for around the low 300hp range ( off the top of my head ) and your going to jump to 24lb injectors which is around 252cc x 8 = 2016cc so that should be good for around 360-380ish crank hp.

i'm doing this off the top of my head without using the brake specific fuel consumption formula because that is bull. 370cc's on a 4 banger can yeld around 250whp or 300 crank hp but by doing the BSFC formula that will only give you around 175 crank hp so that is bull. i'm going what known proven injector size with proven hp's that its been known to support.

anyways back to the subject, you will not gain extra hp from switching to larger injectors. larger injectors is what is required to support more hp reliabily. unless your engine is flowing alot of air ( which i think should by judging your name ) but i would say 380 ish crank hp is the highest i would go safely.

edit: i just read your profile and your not driving a v8, your driving a 4 banger. so hmmmm you would have smaller injectors then my stock sized ones, so you'll probrably be able to get away with 250 crank hp with a FMU if your gonna run boost, but that is still pushing it.

[Ace$nyper]

back on my BBF *mine was a 514ci* I started with the 24lbs ones. And yes tat is corrent and he has that fancy math to give you even better explaining.

[drftk1d]

speaking of injectors, i need 720cc's pretty badly.

[Hypsi87]

I have a set of 6 62 lbs per hour injectors. Low impeadence

[TatII]

i was redoing the whole BSFC formula and on rc engineering's site, they stated that for a turbo car, the BSFC should be .65 i was using the formula with my dyno numbers, i got the BSFC of only .43-.46 depending on my injector duty cycle ( .85% to .93% ) then i plugged it in to the first hp to fuel formula and finally i got a number very close to what i'm putting down.

so its still alittle weird that my car along with countless other turboed 240's with the BSFC of only .43-.46 ( which is normal for a n/a car but too little for a boosted car ) oh wellz.

[drftk1d]

Originally Posted by Hypsi87

I have a set of 6 62 lbs per hour injectors. Low impeadence

i need high impedance ones, thanks though hypsi.

[clawhammer]

How do you convert lbs per hour to cc?

[drftk1d]

Originally Posted by clawhammer

How do you convert lbs per hour to cc?

http://www.csgnetwork.com/injectorvolcalc.html

[CBFryman]

Off Topic But:
I was missing from the racing forms for a while...just didnt have time. but a LOT of the questions asked in this off topic form should be in This form, aka the Engineering/Technical Form
If it is boosted it can also go in This form. Aka the Forced Induction form. they are there for a reason. and there are people whoare very knowledgable there, some which never venture into the racing forms. Not that there arent knowledgable people here, but there are some over there as well.

I think there needs to be a week on AF designated to getting to know the avalable boards, where you have to drop a post in like at least 5 boards you havent before. or something like that.