Carb fuel pump preasure. Isn't it 6 PSI.

[Bob Dunahugh]

Someone asked me what's a good fuel pump for our GMC's. I like the Carter 4070. But I can't find the GM recommended PSI. Bob Dunahugh

 

[powwerjon]

Bob,
When I built my first full electric fuel system eliminating the Mechanical
pump I used a E8090

<
https://www.amazon.com/Universal-Electric-Installation-Inline-Carbureted/dp/B01MSC2EY8/ref=sr_1_4?ie=UTF8&qid=1524399757&sr=8-4&keywords=e8090+fuel+pump
>
or
http://tinyurl.com/ycemubax

I used that pump numbered pump for over 11 years without any problems. It
is a 5 to 8 psig pump.

The P4070 pump is a very good pump that I have also used with success too.
It is also rated for a 4 - 8 psig outlet pressure.

<
https://www.amazon.com/Carter-P4070-Line-Electric-Fuel/dp/B000CIQ5DG/ref=sr_1_3?s=automotive&ie=UTF8&qid=1524400102&sr=1-3&keywords=carter+p4070+in-line+electric+fuel+pump
>
or
http://tinyurl.com/yavjlb7w

Use a 15 amp fuse to power the pump. Be sure to use a low oil pressure
switch to cut off the pump in event of engine shut off. I have also
attached the design of the fuel control system that I designed when I built
my first electric fuel pump setup.

http://www.gmcmhphotos.com/photos/general-pictures/p64776-electric-fuel-pump-control.html

It also includes a primer circuit. As for the pressure switch us can use
any of the following.

https://www.summitracing.com/parts/crt-a68301/overview/
https://www.summitracing.com/parts/hly-12-810/overview/
https://www.summitracing.com/parts/sum-g1438/overview/

If you have any question please type

J.R. Wright
GMC Great Laker
GMC Eastern States
GMCMHI
TZE Zone Restorations
78 Buskirk Custom 30' Stretch
75 Avion (Under going Frame up Restoration)

> Someone asked me what's a good fuel pump for our GMC's. I like the Carter
> 4070. But I can't find the GM recommended PSI. Bob Dunahugh
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[sean kidd]

My carter 4070 put out 6 psi, but it still lifted the needle on the float, I had to put on a regulator and knock it down to 4 psi.

--
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.

Colonial Travelers