I was wondering how much the 42lb 8.1 marine injectors can hold...

 

well, I am at 444 rwhp and I am headed for 500. I have seen them make in the 525 range before they are done.

 

Thanks alot.....

 

it all depends on your tune, and your tunner Trust me the 42's can take alot.

 

what pressure are those rated at

 

gotta double check tomorrow, I want to say 60psi but dont hold be to it.

 

Did some caculations on the 42lbs
At 50psi fuel flow is 40.69lbs
Running at 80% duty cycle you can get 473 hp at the crank.
This is with a blower.
You can raise the fuel pressure or up the duty cycle for more.
60psi fuel + 90% duty cycle gets around 525rwhp
Without a blower the # are way different.
I think its right

From racetronix site
Part Number 17113739 (OE Part # 25176061) *** Direct fit for short G.M. LS1 SUV injectors ***
Static flow @ 37.95lb/hr @ 43.5PSI / 300KPa (4.31 g/s = 398cc/min)
Static flow @ 43.82lb/hr @ 58PSI / 400KPa (4.97 g/s = 460cc/min) *
Dynamic flow (2.0ms/10.0 ms(pulse width / rep rate)) 6.0 lb/hr @ 43.5PSI (0.748 g/s @ 300KPa)
Coil Resistance: High Impedance / High-Z (No ECM driver modifications required)
Ball/Seat Design with 3-Hole Diffuser Disc - Pencil stream

 

I've maxed them out on my truck. In the summer heat, I don't pump as much air, but in cooler temps, I was getting pretty lean. I don't doubt that I'm near 500rwhp in good weather when I've been able to hit the MAF limit around 5000 rpms.

 

Im hoping to get a little more out of mine being as Im pumping quite a bit of meth in my new setup. We'll see how far they go when I get everything in.