Pretty sure it is for all 24 valve engines, 1998.5 to current,
that would include your 2003.


phox

 

Yes, and it's completely useless for a performance application. You'd be surprised how easily you can suck it to 0 psi when you uprate power. Worse than the original LP

 

Not really on the topic of the thread....
But has anyone added a "regular" lift pump along with the new in-tank pump?

 

Ed, along those same lines. If the in tank pump is supplying adequate flow at a lower pressure AND the OEM pump is supplying a lesser flow at a higher pressure, could there be problems? The OEM pump displaces MAYBE .15 cubic in per rev. Flow specs are ~45 oz in ~25 sec. Pump would have to turn ~1500 rpm just to keep up with the flow and not produce any pressure on its own. (add mind is wandering smilie).
Thanks Ed for throwing a whole lot of IF's into this equation. May have to have a cold one an hour before going home time.
Has anyone mounted an OEM pump at the tank? The OEM would work in the tank since the motor housing is full of fuel anyway. Mount the tank high along the firewall and eliminate the pump all together

 

In series? In parallel?

In series, it defeats the purpose. Just like with twin turbo-- you'll never have more air than the "big" turbo gives.

Only with the in-tank fuel pump, it's like having twins where the "big" turbo is an HY35/9-- kinda limits flow.

In parallel, things get very complicated very quickly.

 

Thanks HOHN, that's what I was trying to say.

 

Shortround,
Thanks for the work you put into this!
Eric

 

Putting two pumps in series will help in certain situations. You could have more flow because restrictions further downstream of the pump might have restricted the flow too much with just one pump. A second pump in series will certainly increase the pressure considerably. Check out an old thread of mine titled 'fuel pressure arithmetics'. I tried two pumps in series and the pressure was so high (27psi) that I ran into hard starts.

 

Sort of like the old Model A's ?

 

HChojnacki posted on the TDR, He is running the new in tank pump with a stock auxillary pump and is getting 26to 29 psi of fuel pressure at idle.

 

The twins are limited by the effective area of the intake.The old fuel module in the tank has an effective area of 5/16 of an inch intake.You can drasticlly improve the volume of the system by pushing the fuel thru that opening at 12psi.than trying to suck it thru the same opening.