Good nitrous fuel system...

502SS

502SS

Forum Member
Friend of mine wants to change his fuel system this winter. He's running an SBC in the neighborhood of 450HP with a 150 shot for now, and will eventually move up towards a 200 shot with his plate kit. What I'm really curious about, is fuel pressure regulators....
Is it really better to run two regulators, or is just 1 sufficient? It will be a single pump setup, but I've read various things about regulators.
 
I personally run one Aeromotive A2000 pump with two Aeromotive 13205 regulators (I tried the holly regs but the pump was blowing right past the regulator). I also only have -10 from the cell to the pump & -8 from the pump to the regulators & -6 from the regulators to the carb & fuel solenoid. (NEVER HAD ANY FUEL ISSUES)

My motor fuel pressure is set at 8psi & the nitrous regulator is set at 7psi ... That is with a cheater plate set at 175hp. Pulled the motor apart the other night & everything looks great, no detonation anywhere. Going right back together!!

Dont know the actual HP but the car went 11.14 motor & 9.83 with the 175 shot.

Over the winter I'm stepping it up to the Big Shot kit & may change the -8 line to -10 but thats it..


As far as if the nitrous fuel pressure should be higher.... It depends on the kit you are using. Different manufactures use different jetting & pressures to get the same HP numbers.
 
Pressure depends on the tune up, we have ran as high as 9 and as low as 5psi on the nitrous side, like I say it all depends on the tuneup.. the reason for A1000 areomotive pushing past the holley reg is that is a EFI/Carb fuel pump it an produce some high pressure when needed. very good pump though
 
85Camaro said:
Pressure depends on the tune up, we have ran as high as 9 and as low as 5psi on the nitrous side, like I say it all depends on the tuneup.. the reason for A1000 areomotive pushing past the holley reg is that is a EFI/Carb fuel pump it an produce some high pressure when needed. very good pump though
Click to expand...


My pump is the A2000 350gph Carb pump (line pressure is set at 18 psi) not the A1000.

The max the holly regs would hold was about 13 psi before things got interesting.
 
Thanks for the tips! More than likely, it will be Aeromotive stuff. I ran the A1000 in my Monte, and also put one in dads Jeep, along with all the other stuff being Aeromotive. I'm going to try and push him into an A1000 and a couple of Aeromotive regulators then.
FX331,
My setups have usually been the same, -10 to the filter/-10 to the pump/then -8 from the pump to the regulators/-6 to the carb/-8 return lines, though I did do -10 up to the regulator on dads.
 
I run two pumps, my nitrous pump is a mallory 140 with a -8 feed to a holley 2 port regulator that is dead headed. This allows me to run a 1 gallon cell for c16 and I can run pump gas in my 10 gallon cell. I run the flowing fp at 5.5 but it was still super safe. My afr last time out was 9.25-9.5 with a 225 big shot kit. Next year I'll be drilling my own fuel jets to get the afr I want since after playing with the fp it was still silly safe.
 
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