Quote:
Originally Posted by nxtruck
One other thing to think about, which may or may not be causing you trouble, is the fact that the Edelbrock carbs can't tolerate as much fuel pressure as, say, a Holley can. I found this out the hard way on my son's '65, as it had a rich idle issue that I couldn't tune out of it. After doing some research on Edelbrock carbs, I learned that they are calibrated to run with no more than about 5-5 1/2 lbs. of pressure. The stock mechanical pump was putting out between 7-8 lbs. at idle, so I threw a Holley blue regulator on it, backed the pressure down to 5 lbs., and then it was responsive to idle screw adjustments. Like I said, this may not be an issue for you, but it's something to keep in mind.
Good luck with yours!
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Another thing to do If pump pressure is overpowering shut off valve. Set float to lower elevation so it will exert more force on shut off valve. This will increase valves effective shut off pressure.
While setting float it is good to inspect condition of shutoff valve.