Electric Fuel Pump

[CUDA JAS]

If you use the Mallory 4110 pump, it has an internal bypass valve that recirculates within the pump which eliminates the need for an external regulator.  There is an adjustment screw on the pump to set the bypass pressure if need be.  7 psi at the pump is not 7 psi at the carb in most cases...would need pretty big fuel line to obtain that...irc, the instructions say do not use an external regulator with this particular pump.

I beleive tht the Malloy instructions recomend the use of a reguulator for all their pumps.

[Strawdawg]

Not for the 4110....

[CUDA JAS]

your right my bad...i am still goan use one on mine though...already plumbed...

[Strawdawg]

It is recommended to use a dead head regulator if one is used.  I guess this is due to the internal bypass.

I replaced a blue Holley, so I already had one plumbed as well and it was quicker to use it than to remove it


I found this link interesting  http://www.centuryperformance.com/mallory-fuel-pressure-regulators-selection-spg-81.html