General Category > Quadrajet Carb Talk and Tips
Lower main idle air bleeds
fairwayhit:
I am working through the book (recipe #2) on a 17058272
I have a question about the Main Idle bleeds. The book says to make both the upper and lower bleeds .070. I measured the uppers at .073. Should I make the lowers smaller (like .067) to average .070?
Right now the lower ones have brass restrictors in them and are sized at .040.
I have been reading online that the main idle bleeds have a big impact on the whole fuel curve. I live at 6500 feet above sea level. Do I need to leave the lower air bleeds a little smaller?
fairwayhit:
I wrote main "idle" air bleeds, but I meant "main air bleeds" -
firefox3:
What size engine? Which rods and jets did it originally come with?
Ethan1:
--- Quote from: firefox3 on July 01, 2014, 01:45:05 PM ---What size engine? Which rods and jets did it originally come with?
--- End quote ---
Engine for that carb was a 301cid Pontiac and stock specs of that carb were, .072" Primary Metering Jets, 51P Primary Metering Rods, "K" Secondary Hanger and CH Secondary Metering Rods.
fairwayhit:
It is going on a Pontiac 400. Cliff sent me some 71 jets and a set of his rods.
I don't understand why there are two sets of main bleeds. The lower bleeds and Upper bleeds look like they do the same thing. If the upper bleeds are a little big, should the lowers be smaller to average it out?
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