I am working on the project in my sig, and am at the point to where I am going to swap out the in tank fuel pump to a better unit to supply this Magna Charged motor. I have a question that some of you may be able to answer. I have 2 different pumps, and am not sure which of the two is the better one to run. The two that I have are the AC Delco #EP381 which carries a GM part# of 25163473, and the Granatelli Motorsports GM722-2 which I know is a 98-02 F body 255LPH in tank pump that I believe will work on my truck as well. So with my setup which is the better of the two???

 

You can do a 30 second volume test. You can also do a pressure test to compare the pressure, but you'll have to rig up a schrader valve. Once you know pressure AND volume you can decide for yourself.

 

dont really have the recources or the time for that right now...otherwise I would. Was hoping someone here would know.

 

Bump...any info here???

 

The Granatelli may just be a repackaged Walboro, which is a favorite 255 pump around here. With the Manacharger, I'd think that the 255 would be better...I think that's what a lot of guys run with their superchargers but I'm not sure. I know that many guys run the factory pump along with a high volume inline pump, which I believe is a 255.

If any of this info is incorrect, at least I was able to bump your thread to the top for you

 

Thanks for the info and the bump.