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Old 02-12-2023, 08:11 PM
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02Hawk 02Hawk is offline
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Join Date: May 2003
Location: Edmonton Alberta Canada
Posts: 1,348
Default Overloading Quadrajet

Last fall I began to have problems with fuel blowing out the carb. I assumed some dirt got into the works, so I took it apart and put in a new float, new gaskets and all the other parts that came in the kit. Placed the carb back on and within a moment it was doing it again. Several times in fact
I had already ordered a new Q-jet from SMI as the old one had formerly been on an old combination (455) (now a 467 Stroker) that has a flat spot in it that I couldn't seem too tune out.
Put the car away in the fall, and last week the new SMI carb came in. I uncovered the car today , hooked up the new carb and 30 seconds later gas was puking. Same issue.
So now I suspect the fuel pump. It is an Edlebrock mechanical 110G unit that has been on the car for 15 years. it only has a main line in and a line to the carb. No return line
I'm assuming the pump is putting out too much pressure but don't have a pressure gauge in the system to check it. I was wondering why all of a sudden, the pump would up the line pressure after performing flawlessly for years.
Before I toss it out I thought maybe some of you guys could help with a adding a new pump (no I don't want to go electric) . I was looking at a Carter from Rock Auto, but they are only 40G/Per minute

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