vwracing65 wrote:
I've never ran a blue reg. I've always used the red with the blue pump. What size is your fuel line? Did you check for trash in your filter too?
I was told by Holley tech support that a blue pump would overwhelm a red regulator. Sounds like from your experience that's not the case. That was how I had it plumbed at first, then I got to thinking about it and asked them and they told me the red regulator couldn't handle the blue pump's 14 psi. So at that point I switched to the red pump thinking all would be well. The fuel line is 8AN from the pump to the regulator on the firewall and then 6AN to each carb. I know its overkill, but eventually I am going to convert the car to EFI/Turbo, so then I will need the gigantic capacity, and I will also run a 6AN return line from the back of the car to the tank at that point too. Everything in the fuel system is new, and I checked the filters when I started having problems, not a single piece of debris in either of them. I really like the idea of the return-style regulator though, It makes way more sense to me to let the pump do its thing at full capacity and then only use the amount of fuel the car needs at any time and send the rest back to the tank, rather than limit the amount of fuel the pump can put out. All limiting the pump's output like that is going to do is cause it to work harder and generate more heat, and it seems in the case of a red pump at least to become horribly inefficient. So the plan is to add the return regulator right after the pump (under the gas tank) and set that pressure to about 4-5 psi, then back in the engine compartment fine tune the pressure to 3 psi with the red regulator right before the carbs.
If you run the return-style regulator I would run the Mallory one and loved it before switching over to Barry Grant pump & reg. Also don't run the -6 line, run -8 line. You want to get the fuel back into the tank just as quick as you want it to go to the back of the car. Are you running a liquid filled gauge or a standard fuel pressure gauge? If your running a liquid-filled one take out the liquid-filled inside or get a standard one. They give false reading on them. I have a good friend that runs NHRA Top Alcohol dragster and he told me about that on his digger. I didn't believe it so on my car I had two gauges ( One standard and one liquid-filled ) and sure enough it was off reading by 3-4 psi. Which for IDA's you can bend the floats real quick.
If your needing any help call me bro..
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If your needing any help call me bro..
