I just put a holley blue on my street car. High flow filter at the tank into the pump in front of the lower control arm with the regulator up at the thermoquad. The problem is that when cold my fuel pressure is above were I set it. About 9 psi. As the motor runs and the regulator heats up from convection the pressure will very slowly drop to 6 psi. I'm watching this thinking WTF o No: This is a cheep holley regulator.
Two things Dave... 1. Don't get the pump too far from the tank.. electric fuel pumps do not "suck" well 2. Get the regulator away from the engine heat.. And yes, that regulator is not known for being consistant... the one we ran years ago used to stick.. all the time.. and the orifices in it are very small, thus hurting the volume of your new fuel system. The Holley blue is ok, even if overly noisy, we ran one for years.. at least until I put my first Mallory pump on..:TU: JW
I hope the pump is not to far away. I mounted it in that little area in front of the lower arm mount. I made a bracket to hold the pump lower than the tank but up enough not to get hit. I believe it should siphen feed the pump. About 4-5 feet of fuel lines into the pump. Right out of the box the regulator pressure was about 13 PSI !!! Forced my seat up and I shut the pump off fast. The problem with this car is me. I want full length exhaust and I don't want a drop sump. Think I should monitor the pressure before the regulator as well?
Nah... spend the money on a good regulator.. A return style would be your best bet... keeps the pumps alive longer, in street use.. JW
Dave, What type of gauge are you using to monitor pressure? The liquid filled types will give a false low reading when exposed to heat. Even the heat coming off the rad can cause one of those to read a 4-5 lb pressure drop, when all that's really happening is the dampening fluid is reacting to the temp change. Switching to a non liquid filled gauge miracuously "fixes" the problem. -Ron
Ron, you may be on to something. The guage is liquid filled. It makes perfect sence. Starts out at 9 PSI and slowly drops to 6 PSI. After city driving and 180 deg. water temp I get home and check the reading its 3 1/4 PSI!!! I thought I was buying the best guage posible.ou: Thanks again
Dave If your electric pump is near the control arm, that is a long stretch for that pump to pull fuel. Most manufacturers recomend installing a pump closest to the tank and low as possible. They don't suck well at all. If you make it pull from a long distance you will definately see fluctuation in pressure. A pump does do a good job of pushing fuel a long distance, but you will need a good quality regulator near the engine to stabilize pressure.
