CMPC60S fuel pump psi

[walsh661]

Hello, I'm trying to replace a modern fuel pump on my Chev C60s. What is the psi requirement for the fuel pump? The old one seems too weak and just died.

Cheers

Justin
Jtwalsh@sympatico.ca

[Phil Waterman]

Hi Justin

Every reference I have seen says 2-4 PSI for the manual pump with the engine running at a speed equal to 30 MPH. When you say modern pump do you mean mechanical or electric.

According to what I found chevy mechanical pumps up to 1962 for 6 cylinders ran in this lower range.

Electric pumps are either low pressure or high pressure, I have found that the higher pressure ones tend to make the engine run rich.

There is also a flow test which is probably as important, as some pumps will produce pressure against a dead head but almost no flow.

Cheers Phil

[motto]

Another problem with electric pumps is to do with power supply. For many years now vehicles built with electric pumps have had to have them powered in such a way as to stop working if the engine shuts down for any reason. This is to prevent continued pump operation in event of an accident.
I mention this as I once owned a Dodge Weapons Carrier that the previous owner had fitted with an electric fuel pump near the tank. It was a 12 volt version and the battery cable was bundled in with the brake line, fuel line and wiring loom in the congested area adjacent the brake pedal/master cylinder.
One day when manoeuvring very close to my house I stalled the truck and when I depressed the pedals there was a sputtering noise from under the toe board and the amp gauge flickered wildly. The brake pedal had peeled the insulation off the battery cable and there were flash marks on the fuel line which had been replaced with un-armoured copper tube.
On that occasion I could easily have lost my Dodge and my house if things had gone against me. If the line had been arced through the Auto Pulse pump would have worked its little heart out to fuel the fire. A recipe for certain disaster.
The original fuel pump on the WW2 Chevys is quite adequate and usually featured a hand primer. It was the same pump as used on the GMC CCKW and an overhaul kit for the WW2 Jeep provides all the necessary bits so fresh parts are readily available for rebuilding.

My 2 cents worth

David

[walsh661]

Sounds like a good idea. I'll stick with the original one, that is installed but bypassed. The simpler the better. Thank you both for info.

[Mike K]

A Holden Grey or Red motor fuel pump will fit the 216 Chev ....