[gsharapa]

Interesting to see this subject posted, as I have a Superformance with a 514 and 1050 dominator that has the hot start condition. Ford had the same problem with big block 460 trucks and they cured it with a bypass valve and return line to the tank. It actually went in at the top of the tank.

I tried to set this system up with a restrictor as mentioned above and could not keep the fuel pressure up. When it warmed up it dropped from 7 psi to 4. I did only have a .091 hole so maybe a .060 would work better, but not sure.

Race car shop here in Dallas recommended using a bypass valve.

I currenty have a Holley blue pump, number 6 line from tank to filter and then to the pump. Fitting on tank will not allow anything larger. Then I ran # 8 line from the pump up to a fuel log to the dominator. At the end of the fuel log is the B&G bypass valve with a # 6 line going back to the tank. I tapped into the tank at the fuel sending unit to see if this would all work, prior to putting new feeds in the tank. I can set the bypass valve at any fuel pressure and in theory it is suppose to open and keep my fuel pressure constant at my setting (7 psi) and return the unused hot fuel back to the tank. Works well at idle and cool engine but after a cruise and a bit of acceralation it also drops my fuel pressure down to about 5 psi. I keep adjusting it up to 7 psi a few times. Let it sit over night and check dead cold and fuel pressure is at 11 psi which is too high. Not sure what the problem is? Is the blue pump too small in volume? Holley Techs say blue pump is fine for this application but it's either the pump relief valve or the bypass that is bad. It did cure my "Hot Start Concern" but created a much bigger problem now. I'm thinking about putting a bigger pump on and see if that cures it or just go back to the dead head fuel pump/regulator setup. An easy way to cure the hot start leaving the dead head system is to shut your fuel pump off a min or two prior to shutting the car off on hot days. No gas to vapor lock. Wish I would of thought of that simple idea prior to doing all of the above. Any thoughts?

Bob,

Don't return the fuel to the fuel vent hose as that will shut off the air to the tank and shut down your fuel pump altogether. Tried that once and know from experience!

I think you could tap into the actual fuel filler hose and based on what has been talked about above, that might be a good area to in at if you don't have a tank option. Seems to me the fuel would hit directly against the inside of the tube and just drain down into the tank. Filler tube usually is on the other side of tank from the pickup so this might work. Has anyone done this?