Crumm
Fordoholic
Yes they do. Mounted in the valley right in front of the Turbo.
Fuel return flow
- Thread starter Crumm
- Start date
Yes they do. Mounted in the valley right in front of the Turbo.
MBRPCrazyford
Eat Some Smoke
can they be turned up to put out more fuel to the motor, or do you have to do the 10k mod??
95_stroker
Jefe
No, you cant turn up the fuel pump, its a volumetric unit that puts out "X" (we seem to be agreeing on 50 gpH) and that is actually FAR more than the engine can consume so thats why there is a return line to the tank, the excess unused fuel goes back.
Dont confuse the 10K mod (fools the ICP into thinking that HPO pressure is low) and the FPR shim which actually raises your fuel PRESSURE, so now your 50 gpH is @ 70-75 psi as opposed to being only at 30-40 psi. Its not uncommon for an unshimmed truck to have fuel pressure drop to 0 at WOT. Raising your fuel pressure will allow the injectors to fill faster or simply put, it insures that your injectors are completely full before the HPO opens into it and pushes the fuel into the engine.
Dont confuse the 10K mod (fools the ICP into thinking that HPO pressure is low) and the FPR shim which actually raises your fuel PRESSURE, so now your 50 gpH is @ 70-75 psi as opposed to being only at 30-40 psi. Its not uncommon for an unshimmed truck to have fuel pressure drop to 0 at WOT. Raising your fuel pressure will allow the injectors to fill faster or simply put, it insures that your injectors are completely full before the HPO opens into it and pushes the fuel into the engine.
MBRPCrazyford
Eat Some Smoke
ok, thanks for the info. The 10k mod can give you more power as it dumps more fuel into the motor correct?? And I understand that the shim just insures that there's enough pressure to supply the injectors. Will that give you more power too?? Thanks for all the help.
95_stroker
Jefe
the 10K mod simply raises the oil pressure in the HOP circuit by fooling the ICP into believing that the pressure is low. So, with a higher HPO you get better atomization, not more fuel.
The only way you get more fuel into the engine is for the PCM to be programmed to do so via a chip or programmer, and at that you are still limited to what a stock set of injectors can deliver which is about 80-90 cc's per squirt.
The only way you get more fuel into the engine is for the PCM to be programmed to do so via a chip or programmer, and at that you are still limited to what a stock set of injectors can deliver which is about 80-90 cc's per squirt.
hheynow
Señor Aceite de Soja
I'm shimming tomorrow once NAPA re-opens.
roosterdiesel
Earl needs B100
MBRPCrazyford
Eat Some Smoke
ok, think I got it now. Thanks for the info.
95_stroker
Jefe
Thanks for the correction.Actually it's 80-90ccs per 1000 squirts or 80-90mm^3 per squirt.
Crumm
Fordoholic
Is the return fuel heated from traveling through the heads or is it returned before it enters the heads?
