General Category > Quadrajet Carb Talk and Tips

I need the stock specs for a 17050213.

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77cruiser:
I dug one up in my stash, it pretty crusty inside must have had water in it.
Maybe I go through it & see what happens.

Cadman-iac:
  It took me a while, but I've got it pretty close now.  The off-idle mixture is much better, and the high speed mixture is right where it should be.
 I had to increase the size of the LIAB'S to  .072" from  .062", and had to reduce the jet size from #72 to #70, keeping the 49M rods.
 I've still got to dial in the secondary airvalve spring setting, stock is 1 turn, but it works much better at 3/4 turns.  I need to get the secondary mixture right, i think it's gonna need a fatter rod to lean it out at WOT, it's just a bit rich yet.
 I'll post the specs once it's done, both where it was and then where it ended up.
  Thanks for the help in figuring it out.

  Rick
 

77cruiser:
How does it run? Are ya having fun?

Cadman-iac:

--- Quote from: 77cruiser on November 24, 2025, 06:55:47 PM ---How does it run? Are ya having fun?

--- End quote ---

 Weeeeellll, im not sure I'd call it fun, but I am staying busy.

 I think I've got the primary side pretty much dialed in.  Gotta do one more road test to verify that tomorrow. The tip in test I had to do several times to get it to react like Cliff suggests, but its right on the money now. Goes up about 60-70 rpm when I close the choke partially, and it didn't react when I pulled off a vacuum line.

 So here's where it wound up.

                  Stock.         Now
Idle tubes,   .038.        .038
DCR'S,          .054.        .054
UIAB'S,         .069.        .069
LIAB'S,         .062.        .070
Bypass air,  .105.        .105
Idle dschg,  .086.        .086
Float,         12/32.     12/32
PAB-Body,   N/A.        N/A
PAB-Horn,   .051.        .051
Noz. Bleed, .029.        .029
Main jets,    #72.         #70
Pri. Rods,    49M.        50M
P/V spring,  orange.   Blue
APT set,      3 3/4.      3 1/4
Sec. Rods.   DP.           DR
Hanger,         K.            K
SABT,s.        .026.       .026
Well holes,   .039.      .039
A/V spring,   3/4.       3/4
N/S asm.      .135.     .135

 Now anything with the secondaries is still to be determined by testing yet to be done. I'll update once I've got the secondaries dialed in.

 One thing that kept messing with me is that the AFR would fluctuate randomly like it had an internal leak, but multiple testing of the well plugs didn't reveal anything, and I kept remembering what Cliff says about these, "they seldom leak".
 But I've seen how the AFR gage reacts to a leaky plug and I swear it's leaking.
 Well after taking it apart after it sat overnight I noticed the pocket in the base plate was wet with fuel.
 And I kept seeing wetness on the primary well plugs too, so I removed all of them and threaded the holes and installed plugs and Marine Tex, now the AFR is definitely more steady and it sounds better too.

 

77cruiser:
Sounds like you did a great job.

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