Fuel Pumps

[Jim Cook]

>you can probably find a new carter or holley racing engine pump for 
>about $40 that will work
>most new in tank pumps put out close to 40psi when new and regulate 
>down to about 20 at idle and 30 or so at wot i measured it on a g.m.
>a friend told me that some cars use an in tank and external in series
>to build up the pressure 

There is a pump in the tank for FI cars that require 25 lb/sq in and up.
It seems that frame mounted pumps that can provide this are designed for
pressure not suction. The in tank pump provides relief from this problem.
The tank pump in these configurations are not high pressure but can provide
the prime and volume for the pump on the frame. At lower pressure requirements
the in tank pump may not be required.

Jim Cook
jcook at apt.com