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I know you can't use the stock style set up for feeding a carb. I've heard of people wiring in a lower pressure electric pump inline with the stock fuel line. What are you guys using that have converted from an EFI to a carbed set up feeding a 351w based motor?
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I do ultra-sonic reverse flow injector cleaning and rebuilding, pm me if interested
If you use the adapter that allowes you to go from the stock EFI lines to a AN Fitting you can run a braid to a LP Carb style regulator some have had luck with that. other option is Sump your tank and just slave in a LP pump to the wires at the tank. then use a carb reg..
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1987 GT. 13.7:1 408 with TW "R" heads, Probe SRS Flat Tops, custom pro systems 950 carb. .671/671 comp cam. Rollerized C4 w/brake 4800 stall, Strange 31 splines w/spool. 10 point cage, Subframes, 4Cyl springs and 90/10's, 50/50's and lakewood uppers/lowers. 325/50/15's
I know you can't use the stock style set up for feeding a carb. I've heard of people wiring in a lower pressure electric pump inline with the stock fuel line. What are you guys using that have converted from an EFI to a carbed set up feeding a 351w based motor?
Just do the same thing I did. Mine's EFI, but just a matter of changing my FP, or, lowering my fuel pressure since this pump is rated down to 10psi, to turn it into a carb system.
Then just run them all the way to the front. 8AN braided line, 50FT (I used less than 40FT, used my left-overs for my tranny cooler) cost me something like $150, fittings about another $75 and sump was $40. And Voila, you have an NHRA legal fuel system, and being 8AN, you'll never have to worry about running out of fuel, as long as you have a big enough fuel pump, also on top of it all, you get a sump, which is much, much better than any other method, as when you launch, the fuel goes to the rear of the tank, being in the stock location, you risk sucking up some air, leaning you out.
Considering you're fueling a 408, if my memory serves, I wouldn't use the factory lines.
Liquid 02, Where is your second fuel line out of the sump going? I can see one goes into the fuel pump and the other one looks like it runs to the top of the fuel pump.
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-Kevin
1987 Mustang Notch
408 Roller Block, Scat rotating assembly, Windsor senior heads, Lunati Voodoo cam, Victor jr intake, BBK longtubes,
C4, Transbrake with full manual reverse valvebody.
Granatelli tubular K member, A-arms, Coilovers and Strange adjustable struts.
Auburn locker rearend, Moser axles, Lakewood traction bars, Competition Engineering adjustable shocks.
4 point cage.
Liquid 02, Where is your second fuel line out of the sump going? I can see one goes into the fuel pump and the other one looks like it runs to the top of the fuel pump.
The return line should be above the fuel level as to not have pressure in that line.
Return line will always have pressure. Doesn't matter where or how you mount it, aside from that you think a liquid's going to stop 40psi of pressure, or 7 psi in a carbed application? As as long as the pressure in your return line is not equal to that of your desired pressure, it won't have any effect on it. Will have absolutely no bearing on how the fuel returns to the tank. Usually you mount it away from the pressure line, so it can't interfere with the suction of the pump, that't all. I made a baffle to stop the return from interfering.
Thats what I thought it was. Your fuel system looks a lot like mine except I used a Aeromotive 2-1 so I have two feeds from my sump into my fuel filter then from my fuel filter to my Holley pump. I have my return coming into the top of my fuel cell.
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-Kevin
1987 Mustang Notch
408 Roller Block, Scat rotating assembly, Windsor senior heads, Lunati Voodoo cam, Victor jr intake, BBK longtubes,
C4, Transbrake with full manual reverse valvebody.
Granatelli tubular K member, A-arms, Coilovers and Strange adjustable struts.
Auburn locker rearend, Moser axles, Lakewood traction bars, Competition Engineering adjustable shocks.
4 point cage.
Thats what I thought it was. Your fuel system looks a lot like mine except I used a Aeromotive 2-1 so I have two feeds from my sump into my fuel filter then from my fuel filter to my Holley pump. I have my return coming into the top of my fuel cell.
That is the typical way of doing it,but I guess there are more ways then one to skin a cat.
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Worlds fastest 357 c.i.d.,With one Holley Dominator,One nitrous system,Turbo 400,Nine inch,All steel and glass,except hood,95% stock floor,Almost all stock interior,1983 Crimson Cat,Mercury Capri RS in my garage.(8.31 166)Under Reconstruction!
Thats what I thought it was. Your fuel system looks a lot like mine except I used a Aeromotive 2-1 so I have two feeds from my sump into my fuel filter then from my fuel filter to my Holley pump. I have my return coming into the top of my fuel cell.
Fair enough, mine being injected, fuel system isn't really much a problem for me, just a matter of upping the PSI if it tries to starve itself in the top. I was more worried about having too much fuel for the return than too little in my case, as my regulator has a 6AN outlet that I converted to an 8AN, that way if it was too small, it was just the matter of replacing the regulator with one with an 8AN fitting, but all worked out for me. This Mallory pump is a POS though, I see why they're going out of buisiness, only reason I bought it, it was about $100 less than any other pump, and now I see why.
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Fuel system for carb conversion
