Can I use the N/T Fuel Pressure Regulator?

[supergoat]

Ok, I have an Aeromotive AFPR and I suspect it to be faulty. It basically modifies the stock turbo FPR.

I still have my N/T FPR. Would I have any problems running it on my car with a Walbro 255 high pressure?

Basically my AFPR is not increasing the fuel pressure until high boost. I don't have any fuel leaks so I am suspecting it to be my AFPR. The fuel pump has about 1500 miles on it so I know it's OK. The turbo FPR I used in conjuction with the AFPR kit has over 200,000 miles on it which is why I suspect it to be bad.

 

[kpt4321]

The Aeromotive AFPR is a standalone piece, so it shouldn't use the stocker at all. Maybe you have something else.

The N/T FPR will mess up your A/F ratio because it has a different base pressure.

Whoops. What ECU do you have, and do you have fuel control? It might work, it might not. We need, like, a lot more information.



....Kyle T.

 

[PRESSURIZED]

I have a 255HP pump and slapped in a N/T regulator..hahah it ran HORRIBLE...I mean really rich

 

[supergoat]

Excuse me, I have the Arospeed unit not Aeromotive.

I am running the turbo ECU. No fuel management really. Just the 255HP, 450cc's and the FPR.

Perhaps I'll try and source a stock Turbo FPR and try that.

 

[90AWDTalon]

Originally posted by kpt4321


The N/T FPR will mess up your A/F ratio because it has a different base pressure.

Whoops. What ECU do you have, and do you have fuel control? It might work, it might not. We need, like, a lot more information.



....Kyle T.

What is the base pressure of the N/T fpr? Is it a rising rate fpr? I have a maft so I can adjust for the higher base pressure, I'm already doing this with my stock fpr modified with the B&M fpr modifier. I will eventually get bigger injectors and turn the fuel pressure back down, but my 255 low pressure out runs my fpr pretty bad so I was thinking when I get the new injectors of maybe getting the N/T fpr if it is rising rate and it doesn't get over run as bad of the stocker.

 

[kpt4321]

Anything Arospeed can't be good.

The NT FPR has a base pressure of 47 psi, and is rising rate.

Note that all the stock FPR's have a maximum operational pressure somewhere around 70 psi, or 75 psi.


....Kyle T.

 

[supergoat]

well right now my base pressure can't go lower than around 50 so perhaps I'll try and swap in the N/T FPR and see what I get.

 

[supergoat]

well I swapped in the NT FPR and my base pressure read 52. It ran like dogshit.

So I'll swap back in my AFPR and live with it until I can afford a better unit that will actually let me lower the FP to around 36 or so like what stock SHOULD be on a turbo.

I guess that means the high knock counts I'm getting at low-rpm/part throttle is just a lot of mis-firing due to running really rich.

 

[kpt4321]

Originally posted by supergoat

I guess that means the high knock counts I'm getting at low-rpm/part throttle is just a lot of mis-firing due to running really rich.

Nope. Rich knock is so unlikely, I will say it's guaranteed not to be your problem. Not with that little of a fuel pressure differential.

And, at anything more than 0% throttle, the fuel pressure is probably where it should be anyway.