Offshoreonly.com - Fuel Pump Question 548 ci with 256 blower

Offshoreonly.com (https://www.offshoreonly.com/forums/)

- General Q & A (https://www.offshoreonly.com/forums/general-q-20/)

- - Fuel Pump Question 548 ci with 256 blower (https://www.offshoreonly.com/forums/general-q/324532-fuel-pump-question-548-ci-256-blower.html)

SPIN-MP-2630 pretty sure that is the part # for the pump call cv everything racing 1-800-448-1223

Quote:

Originally Posted by weldcrane (Post 4285291)

Cv makes a mechanical pump goes right to your see water pump that's a what I use

I use the CV as well, They are pricey but the best IMO for a mechanical pump.

Quote:

Originally Posted by welfare racing (Post 4285017)

I'm working on a 540 (548) all refreshed, with a wieand 256 supercharger (dual carb set on on top, Holley blower carbs)
the blower pressure is 4lbs ish (not huge boost)
Heads Are grumpy jenkins
Cam jb300 erson
And the engine is stroked...4.25 crank

On a different note I think you are maxing out your blower ..
I am surprised your getting 4lbs of boost on tthat engine..
a healthy 540 with cam and heads by itself flows more than that blower
can provide without creating excessive heat..

[QUOTE=HTRDLNCN;4285681]On a different note I think you are maxing out your blower ..
I am surprised your getting 4lbs of boost on tthat engine..
a healthy 540 with cam and heads by itself flows more than that blower
can provide without creating excessive heat..[/QUO

This was the way it was I just rebuilt them they way they were (pistons have negative in them) what brought up the question here was the installer was talking to someone who may know about suprchargers (altho I think he has history on larger supercharged applications) and his point was that the pumps would not support the application, in which where the electric fuel pumps have been discussed, and thats where I'm at here, trying to figure out if I really need them and hack up the curent fuel system that has ben on this application since I would surmise 1996, but 1 of the pumps are bad leacking thru the base, in which I do not know what they are..... I do know that they are not billit alum. and that they are not KE pump heads

Quote:

Originally Posted by weldcrane (Post 4285291)

Cv makes a mechanical pump goes right to your see water pump that's a what I use

Cv Products makes a billet pump with different diaphragm springs, I would use a regulator with it. They are pricey, but 100% rebuild able, I have used many of them over the years. Also they will not leak fuel back into the seawater pump and dilute the gear lube.