Have an 05 AP2 pushing a gtx3582r. Want to get up into the 600's for power using E85 and in not sure if I'll need a fuel rail or fpr.

I have a walbro 400 I installed and did the relay mod with 10 gauge wire. Have ID2000's on the way and I'm not sure if I'll have to increase the base fuel pressure or not. I'm on stock lines now, but if needed, I can get bigger lines down the road.

Will I need a fuel rail and the AEM fpr? If so, in your opinion, which one should I get? And why that one.

 

Not needed unless you plan to run higher than factory (43.5psi) base fuel pressure.

 

When I swapped from a Walbro 255 to a FB-340 pump, my base pressure increased to ~58psi with the stock FPR, ID2000s, and stock lines. From that, I assume your pressure will increase as well. I used an AEM FPR with the largest orifice to lower the pressure back to stock.

 

I never noticed that.

Went from ID1000's, and a 255, and an AEM FPR, @ 45lbs base, and swapped to ID2000's, and a 255, same FPR, and same base, and then finally upgraded the 255, to a walbro 410 e85 pump, base never changed ?

 

Adam, do u have upgraded fuel lines? It is expected on stock fuel lines that the pressure increases due to more volume flowing through the small lines. Like water through a garden hose with and without your finger in front of the opening.

 

Stock.

 

You won't need to increase the base pressure for 600whp on a set of ID2000's (2,200cc!). There is a chance that the stock FPR can be overrun (high pressure at low load/lower pressure at high load), requring a different FPR. If you run out of fuel, it'll be your pump, and/or your lines not supporting the demand.

 

I would get the fpr if your going to run that much power. I had problems with the stock one at that power level. Others say they don't have any problems.

 

Will the AEM fpr fit on the stock rail, or do I need to get an aftermarket fuel rail in order to run an aftermarket fpr?

 

You can use the AEM FPR on the stock fuel rail without any issues.