Run a Regulator. They are cheap enough and its added insurance. I was in your situation except with a mechanical pump. Finally got a gauge and there was plenty of variance in pressure with cold verses hot now I am more consistent with pressure. Also the older the needle/seat in the carb gets the less it can hold and today's fuel mix is harsh on all kinds of needles/seats over time.
Ok, I'm going to bring this one back so as to not start a new thread, I got my preesure set to 7 psi and runs well, but while the car is at idle, I have fuel dripping out what appears to be a weep hole in the side of my summit fuel pump, did anyone else encounter this, if so, how did you remedy the problem, I would think fuel leaking out of the pump is a bad thing, no matter how little it is Thanks in advance Shaun
I run 9-12 psi and have been doing it since 1995. Never had a flooding issue and have never starved for fuel at wide open throttle. This is off a BG Manuel pump being fed Thur a 1/2 line. My nitrous fuel comes from a Holley blue with a return style regulator set at 5 1/2 psi. If i was going to run a engine off a electric pump i would run a return style regulator, this will make fuel supply more consistent, save the pump, less tax on the electrical system
shaun, when mine started leaking. i bought a new one. however they make a rebuild kit for them. holley check valve kit is $9.98and the rotor and vane kit is $15.88 from summit. i replaced that on mine but it still leaked. don't know if they will fit the summit pump or not. they almost look the same. call summit and ask.
im running a holley blue, and run 9 psi to the bowls, it goes to 10 on full, and i mean full acceleration. run a regulator always on hard use, you never know what the pump will do, nor would i trust its regularity. think spike, it may garner 12 volts 1 moment, and have 14 the next, pump will run at its desired(not your) speed.thats why they recommend running pumps through relays.
mine runs through a relay, but it's continually on when the key is on. Don't get it, just a little confused, the thing is new
