Hey guys mostly intrested in this for my 2nd gen 12v but the therory is the same with yalls to, do to the lift pump being mechanical. Im told my pump is going to be right on the edge of working with my power level, and see no reason a holley blue or black couldnt be added for the extra 14 lbs and the additional volume as well. These pumps have worked great for me for many years on my lower pressured 24 valves trucks, used as stand alone pumps. But does any one see a prob. with putting that 14 psi into the inlet of the mech. lift pump??? Thanks, if not OR some of you have done it then my B.I.Law is also interested in trying it on his 93. Thanks Ryan

 

I don't see any reason it couldn't be done on a piston style pump. However, I have heard contraversy on whether it's a good idea on a diaphram style pump. The fear is that if the diaphram tears, there is no way for you to know if your crank case is being filled with fuel. If it were me, I would use a pressure switch or even a toggle for romp time to control the holley. This way you're not over working the electric pump. Although, this method would require a second feed line, and a check valve at the "T".

 

But is there a diaphram to tear in the pumps i thought they were all piston style. I know the one on this 97 is, and i was talking of running them in series not parrell. No tees check valves nothing, but to plumb the holleys outlet into the factorys inlet.

 

On your 2nd gen 12 valve there's no reason to mess around with a pusher pump. Trucks make 800 HP with those piston pumps.

 

Sorry, I was reffering to the B.I.L.'s truck.

 

Thanks guys, i just got that idea and wonered if anyone had ever done that. John P thinks the piston pump will fall short of fueling my project, and i like the idea of mantaining the stocker because of the fuel curve. I just wondered if i needed more did any one see an issue with my idea? Im glad to hear though that theyve supported that much power. So on my B.I.L. truck the factory pump "does" have the diaphram that could rupture and give issues?? Is this correct? What tricks are yall useing when you need more fuel volume than your stocker will provide? Thanks and i will pass the info to bruce.. Thanks Ryan