mattkoly

What do you gurus suggest for injectors on a supercharged setup pushing 12lbs with AFR 185 heads and RPM intake

I'm torn between 42 and 48 pounders

then...

I do not understand how they are sized as far as Ohms

what do you guys suggest and/or used on a similiar setup

http://store.summitracing.com/egnsea...;x=37&y=11
http://store.summitracing.com/egnsea...;x=20&y=11

Thanks all

Matt K.

only90s

42s will max out usually around 450 rear wheel horse.....

I have 42s and they were at 96% duty cycle on a run I did with 422 to the wheels so depends what you think you are going for with power.

mattdel

its a good rule of thumb that you never want to go above 80% duty cycle on the injectors. you might want to upsize.

luckythirteen13

a buddy of mine made 470rwhp and a little over 500rwtq on 42's but i have no idea what the duty cycle was

mattkoly

thanks guys

MadMan@TheWheel

42lb injectors will support 650hp. Where and the hell are some of you getting your numbers from?

MadMan@TheWheel

If you want to learn a little about injector terminology and theory. Please refer to the tech. I wrote in the Tech Article Section. It was posted by HC and written by me

FullAuto

I'd run 42s unless I was planning on making over 500rwhp constantly. IfI already had them, I'd push them to 550rwhp. But if I were planning on building 550rwhp from scratch, I'd go to a 55lb.

1991LX5.0

Im running 42's at 450rwhp and it was still enough to keep the air/fuel a little rich even in the upper rpm's. I dont know what the duty cycle was though

samseed101

What it will support depends on what your patcular setup is. BSFC plays a huge role. 42# injectors will hold 650 HP of a N/A engine with a BSFC of 0.50. But it will only support just under 500 rwhp on a decent forced induction engine with a 0.68 BSFC. This is assuming that the fuel pressure is 42 PSI and assuming that there is no safety margin.