Eddie I wonder if its because its dead heading at the regulator,if it was on a bypass I bet it might last longer?

I have had good luck with Mallory Comp 140 pumps on 700 hp engines. They have been dead headed and still last for years. Not too expensive and they come in a marine approved version.

PatriYacht I also ran a 140, motor plus NOS was 750hp,never had a prob:D



what about the holley black pump?

c.v products mechanical fuel pump absolutely rules. large inlet, interchangable pressure springs, internally bypassed, billet, degreeable.
for electric nothing beats the mallory. except for a weldon.
as mentioned everything else should be in accordance. and mostimportantly is a rutrn style regulator installed after the fuel rail.

Your 700 Hp Engine Will Require .98 Gpm Or 58.8 Gph
You Can Dead Head The Holley Blue,it Has A Built In Relief Valve. Caution Do Not Do This To Long The Pump Does Not Like This.

I was told that the engine requirment of fuel is related to rpm also.

I also use the CV Products mechanical pump. With the light "blue" spring you can run 750 HP safely at 5.5-6 lbs pressure @ WOT with no need for a regulator. At idle you have about 8-8.5 lbs. All accomplished with 3/8" lines...Dean don't start on my stock lines!

kids rule

i noticed the pump is mounted above the tank level, they are not disigned to suck only push . This will cause the pump to cavate generating heat, magnets will come unglued causing failure.