I finally called Edelbrock tech support regarding the fuel pump issue I have been fighting for a while. I was thinking of going from the Performer mechanical (110gph@6psi with 3/8 fittings) to the Victor (130gph@13-14psi with 1/2" fittings). I would need to regulate it down to 6 psi, the max my carb can handle. This choice was for the same pressure but more fuel volume delivered to the carb through the 1/2" lines. After a brief Q/A with the tech, and asking if I should go electric, he HIGHLY recommeded going electric, even if it is with a Holley pump (but needs to be regulated!). Guys on the forum have screamed "Holley Red" or "Holley Blue", but neither of them are listed as better than 110gph@6psi. Red is 67gph@5psi, Blue is 70gph@9psi. Does someone make a 1/2" pump, so I can keep the flow high at the lower 6psi pressures---Or is this going to cost me $300? The JEGS electric pump is listed as 120gph@6psi (3/8")for $98, but that sounds too good to be true. So many choices...or should I just do the bigger victor and regulate it down. I have liked the mechanical pump until recent mods have maxed it out. Suggestions--please include you est HP ratings, carb cfms, fuel line size, and current pump model. Thanks, scott
427 rear wheel horsepower, 1/2 inch fuel line, 1000+ cfm barry grant blower carb, Barry grant mechanical fuel pump 150 gallon per hour free flow, no regulator.Holley blue for nitrous system, 3/8 line, return style regulator
Is it the 1/2" that does it? or the 150gph? Or both? By the way, thanks for the response...lots of lookers, nobody responding...
I ran the Carter strip model with great success. 3/8" lines into a Holley DP 750. Never outran my fuel. 306 TQ 50 Erson cam T-289 intake 10.5:1 1.94/1.60 valves Toploader 4.11 gears Couldn't tell you the pressure, and never ran a regulator. The pump is not polished up or frilly. It looks fairly stock and the fittings can be clocked to suit your plumbing. If you are not running a gazillion RWHP, 3/8" fuel line is fine. Dave
I doubt I am even hitting 300 RWHP, maybe I am, I am not sure. but I am sucking the current mechanical pump dry at times. Edelbrock tech said to try to rebuild the pump, but it is only 3 years old, and would cost (list price) $70. I could buy a new victor with 1/2" in/out for $90 and change. I am nowhere near what Ratio411 has, as I only have 8:1, so maybe it IS the pump that is the "weakest link". What is the JEGS model number on that carter?
You need to check your fuel line size, alot of Mavericks only had 5/16 fuel line from the tank. the fitting and or sock in the tank was also bad to collapse. also where the line turns to go through the inner finder to the enginethey were bad to kink inside the gromment. check the rubber piece rite under the door opening it will get soft and suck togather. I made lots of power thru 3/8 line but it was true 3/8 inside diameter line.Im not knocking the carb you have but i doubt it could flow enough to out flow a 3/8 fuel line. PS just because you have pressure dosnt mean you have flow. pressure is a measurement of restriction
Good point on the restriction. I have replaced all lines, and straightened out that chunk in the fender. The tube out of the tank is still stock. I was thinking about just opening the entire system up to 1/2" just to be sure that there is much less chance of restriction. I would agree with you on the carb not being able to suck this system dry, except for the fact that it currently is doing so. I just need to find the weak link that is letting it do it. My wimpy motor is not needing THAT much gas (even though I CAN burn 1/8 tank by racing through 3-4 red lights and 10 miles of highway!). I can literally see the needle drop when I really get on it.
I guess I should correct my post... It has been brought up that some Mavs may have had 5/16" lines. When I say I had 3/8" lines, that was just from the inner fender to the carb. I have no idea what the lines were behind that. Whatever was stock on a 75 V8 A/C auto Maverick... I was just careful in the engine bay to have matching lines and route them as far from heat as physically possible. Dave
