General Category > Quadrajet Carb Talk and Tips

17077230 jet/rod sizes from the factory

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Cadman-iac:
Can someone tell me what this came with from the factory, trying to figure out if it's been changed.
 Thanks

Kenth:
There is no 17077230.

If you have the 17057230 it should have #72 jets, 52P pri rods and DS sec rods.

Cadman-iac:
  Sorry, fat fingered that, using a smartphone. Thanks for the specs, this one is right.

Cadman-iac:
  Ok, I've got this carburetor on a 350 Chevrolet and when I first start it the AFR is between 14.5 - 15.0, then as it warms up and the choke opens up, the AFR goes up to 15.4 - 16.0 on the lowest of the high idle steps. Kick it down and the AFR drops to 12.8-13.0, which I guess is ok.
 My question is, would bigger idle by-pass holes help this to level out?
 Or is this normal?  I've never constantly monitored the AFR before, and this carb having not been set up for this engine originally,  I'm not sure what to expect.
 It runs really good, but I'm just concerned that I might not have it set just right and I don't want to damage the engine.
 The carb has the following specs right now:
Idle tubes- .040
Down channel restriction-.050
UIAB- .048 , original size
LIAB- .048 , original size
By-pass air- .039 , original size
Mix holes- .078
Float- 13/32"
PAB-Body- .039 , original size
PAB-Air horn- .070, original size
Jets- 72
Pri. Rods- 44 , Cliff's rods
Sec. Rods- DS , original
Hanger- T , original
Sec. Air tubes- .028 , original size
Sec. Well holes- .039 , original size
Air spring- 3/4 turn
PP spring- Cliff's red one, 4-12" vac?
APT set @ 2 1/4 turns
Acc. Pump lever hole- inner


  I'm also concerned about the 12.8-13.0 AFR at idle, is that too rich? If I lean it out at idle, the high idle goes leaner as well.
 Thanks for any advice regarding this. Rick
 

77cruiser:
Bigger idle air bypass would make it leaner. Your idle looks good, highest rpm/vacuum?
How does it run?

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