Quote:
Originally Posted by Formulas
Those little facet pumps flow in the hood of 32GPH and have 1/8NPT interface and the thought is that because it free flows when off its going to feed a 400HP engine??
For referance a 1/8NPT fitting works with 1/4 line or less a stock old GTO was 5/16 and marginal at feeding much over stock
|
Good point!
I get it and agree these little pumps will reduce flow.
How much? Who knows, but two check valves, a couple 1/8 NPT fittings and the recommended filter aren't going to help you feed a carbureted 400 hp engine at the drag strip.
Will they mess up a 250 hp? stock 350 on the street?
My mechanical pump is a Delphi MF0155. It is "rated" at 38 gph. But it's unlikely to deliver that once it's pulling through the pickup, down a long tube, through some fittings, and finally through the small carb inlet. Wouldn't it be great if any of these manufacturers published pump curves! Once you bolt any pump into a system with flow restrictions, they aren't going to deliver their "open" flow.
A good question to ask Facet (or any pump manufacturer)!! Think they will know what the pressure drop vs flow is when they are powered off?
Probably smart to ask before spending even a nickel on this.
Clearly nothing is simple and it's a lot easier to crank as long as it takes to fill the carb... regardless of where the gas goes.
Mike