Hey guys,

'04 ap2 here with stock fuel lines.

Currently I'm running a chinese-as-F fuel pump( I think, because it just says GSS340XXXX on it and has no brand stamps or anything) and 750cc FID injectors--- on 93oct at 11-12 psi.. I'm making 427/282 on a mustang dyno.

My goal is to reach over 500whp on the same dyno at around 16PSI or so on e85 instead of 93 octane and going up to 1200cc donkey power injectors.

I want to first buy a reputable 340lph pump.. I've been looking into aeromotive and quantum-- the quantum says it'll push 80 PSI at 14.4 amps..
I was looking into the SOS wiring kit and it states 20Amps...

My questions are: Is the wiring kit going to be overkill for the 340lph pump? Will I need to get an AEM or aeromotive FPR that'll attach to the stock fuel rail to make this work? Does anyone have any advice on the setup I'm trying to run?


Thanks for the help guys.. I've honestly never had fuel issues or looked too far into it since I've stuck with 93 so far.

 

You'll be good with the SOS wiring kit.

You'll want the overhead when it comes to powering your fuel pump. I run an Aeromotive 340 off the SOS wiring kit. I'll be looking into adding a Radium surge tank down the line.

 

Anything larger than the standard upgrade, lets say a 255lph walbro or Deatswerks, I'd go with the SOS wiring kit just to be safe.

 

Check the wire size in the OEM harness. You'll probably want at least 16ga, maybe 14ga to carry 20amps to the fuel pump.

-- Chuck

 

I agree with all above, and will add that you need an adjustable FPR as well. I had an AEM 320lph pump with the SOS wiring kit and it overpowered the stock FPR and bent the diaphragm. I couldn't get the pressure I needed under boost, as it essentially made it a static FPR instead of a rising rate. It cost me a money in dyno time, as I had to schedule another appointment.

 

These pics might help you how much capacity 16ga and larger can handle. Special thanks to EngineerX for the charts referenced:

 

That's because OEM is a static fpr regardless of it being damaged. You simply just ran out of fuel.

If the OP needs more then stock pressure to hit his fuel demands regardless of injectors or fuel pump size, then yes upping the pressure at the rail is a way to help. But its by no means the rule in this situation. Ive never heard of "bending" the diaphragm in the stock fpr by simply upgrading the fuel pump capacity to the number of standard up sizes we have to select from. It should be able to handle it. I never had a problem myself running a FB340 with stock fpr when I was boosted with ID1000.

 

The SOS fuel pump rewire kit already addresses this - along with all of the relays, and connectors to do the full rewire from Batt to Pump harness. Nothing more is needed to outsource to get full voltage.

 

to piggyback off this topic, what fuel pumps have been successful for the aforementioned power level on e85? Would a walboro 450 be overkill or would a aem/fb drop in fuel pump work just as good.

 

I'm curious about that too, but at the same time.. The walbro 450 can be had for cheaper.. I almost wish I had just bought one of those to begin with.