Airtex Low Pressure Electric Pump

[Steves46]

I have recently converted over to using an Electric Fuel Pump (Airtex E8902 Low Pressure Pump) as my primary. Being that it delivers between 1-4 psi, I wanted to see how it would effect my Holley 94 without the use of a pressure regulator, I gave it a try and so far, there has been no side effects (flooding, etc.). I have thought about getting the Holley low pressure regulator but not sure if I really need it. Just out of curiosity, is anyone else using this particular Electric Fuel Pump as a primary without a regulator? Steve

[19Fordy]

Here's some good info. from the Ford V8 club from folks who have used that pump.
http://www.earlyfordv8.org/forum/pri...=18&Topic=4011
Also, read through the thread below about that Airtex pump.
https://www.fordbarn.com/forum/search...archid=6348474

[adileo]

I run the e8902 without a regulator. I do have a pressure gauge in engine bay and it is always at 3lbs when I check it

[Ross F-1]

That pump is actually designed for 2.5 to 4.5 psi. Probably should use a regulator.

[Vic Piano]

I use Airtex pumps with a fuel pressure regulator as the primary fuel pump on both 6 and 12 volt cars and trucks. I set the pressure at 2.5 lbs.

[Drbrown]

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This is only mentioned for comparative thinking .... A stock Ford mechanical pump in spec condition should test 1-1/2 to 3-1/2 psi at idle at the outlet of the pump (Ford Service Bulletin 9000) .... that's what Ford was looking for in front of their stock carb. Obviously multiple carbs would be a different matter.

Did you actually tested the pressure ? At the carb(s) ? Doesn't seem as though it would vary as much as between 1 and 4 lbs. Regardless, pending your carboration, seems like you may be okay with no regulator but I'd test it.

I use my 12v Airtex only for priming my carb.

[JSeery]

Ok, we are getting pressure numbers all over the place here, from the Airtex site:

PART NUMBER, VOLTS, PRESSURE, FLOW, INLET/OUTLET SIZE, SUGGESTED APPLICATIONS
E8902, 6, 2.5–4.5, PSI 30 GPH, 5/16” Hose, 6 Volt Carbureted Applications

Airtex claims the pump is rated at 2.5 to 4.5. That is at the pump, the pressure at the carbs could be lower, but I would want to check it at different battery voltages and see what is going on.

[Steves46]

Thanks guys. I'm currently on travel but will hook up my pressure gauge just to see for myself.

[Joe Immler]

I have the Airtex E-8902 on my '41 located at the gas tank. The pressure I am getting is 3.9. I do not use it in place of the mechanical pump but only as needed for long storage start up and vapor lock in hot weather.

[JSeery]

This chart is for a 12v pump, but it should give you the idea. When your checking fuel pump pressure you need to consider the voltage it is being checked at. Battery only, idle and road speed RPM should give you different values.

[Talkwrench]

Good point JS.