What fuel pump?

[jawzjeep]

Ive got a 91 burb with tbi that I'm about to get a new fuel pump for. It has a 350 in at now but I have a 454 to go in eventually.

Is there a stock pump I can put in now that will work for both the 350 now and the 454 later? Or will I just need to swap in a different one later with the 454? Thanks.

 

[TTMotorsports]

Are you going to keep the 454 TBI as well or do MPFI?

 

[jawzjeep]

Im going to keep the tbi.

Edit- 454 is tbi too

 

[TTMotorsports]

The TBI is pretty low flow and pressure in my limited experience with them and I don't think a high performance fuel pump is needed even with that 454 since the TBI doesn't flow much fuel.

 

[jawzjeep]

Alright thanks. I'll dig in a bit more and see what I can find.

 

[total newb]

19-20 psi is all you need.

If youre planning on the 454 the just buy that on know. Worst case is it bumps your existing fuel psi up a bit.

 

[jawzjeep]

Perfect thanks

 

[Grendel]

Same pumps, as far as I remember.

TBI is TBI.

 

[jawzjeep]

That's what I was hoping for. Wasnt sure if the size of the lines or psi was different. Thanks

 

[jawzjeep]

Dont know why I didn't look at rockauto, duh. Made it clear its the same pump either way.

 

[Winchested]

The 5.7 TBI runs 12-15 psi. If you're going 454 you need the bigger injectors, they flow more but don't think the pressure is too much higher. I'm running a frame mounted Ford F250 pump.

 

[total newb]

What f250 pump?
Model, year, fuel type?

 

[jawzjeep]

The 5.7 TBI runs 12-15 psi. If you're going 454 you need the bigger injectors, they flow more but don't think the pressure is too much higher. I'm running a frame mounted Ford F250 pump.

I'm swapping in a complete 454 with tbi not just the tbi unit.

 

[Winchested]

What f250 pump?
Model, year, fuel type?

Gasoline 87 octane plenty of flow and pressure for GM TBIs

Carter P74028 Carotor Gerotor Electric Fuel Pump Carter P74028 Carotor Gerotor Electric Fuel Pump, Electric Fuel Pumps - Amazon Canada

 

[TTMotorsports]

Gasoline 87 octane plenty of flow and pressure for GM TBIs

Carter P74028 Carotor Gerotor Electric Fuel Pump Carter P74028 Carotor Gerotor Electric Fuel Pump, Electric Fuel Pumps - Amazon Canada

I tried a similar pump on my old TBI Chevy I swapped into my toyota pickup, FAIL. Those put out 45psi which is wayy too much for a TBI motor.

 

[Winchested]

I tried a similar pump on my old TBI Chevy I swapped into my toyota pickup, FAIL. Those put out 45psi which is wayy too much for a TBI motor.

Pumps don't put out pressure they put out flow, the pressure is created by the diapraghm and spring in the throttle body, or if your return line was shit and plugged it would create more pressure.

Mine is currently running just perfect at 13 psi 91 burban 5.7 tbi with that pump.