Re: Fuel pressure running off at the worst time
 

Thanks, Bob.

Re: Fuel pressure running off at the worst time
 

Funny this has come to the top again! Adding the fuel filter before the reg fixed the original problem for me! I try to clean the reg regularly.

Just this past weekend I was going to load the car in the trailer and the fuel pressure was good before starting -7psi. When running it would drop down slowly to 3psi and then go to zero. Cleaned the reg and tried another carb, same thing. Going to check the pump next.

Been wanting to switch to a bypass reg, this may be the time...

Re: Fuel pressure running off at the worst time
 

It may also help if you run a return line from the carb feed line (post regulator) back to the fuel cell with a .025 - .030" restrictor in it. This would allow a constant, small amount of fuel to always be flowing through the regulator which seems to help them maintain a more stable pressure.

Re: Fuel pressure running off at the worst time
 

So your saying to turn your non-by pass regulator into a by pass regulator...

I'd add, if your going to do this modification then change to a bypass ragulator, add a full size return line and at least get the benifits of a cooler running fuel system, rather than adding a #4 line back to the tank.

Ian