Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Recipe suggestions for a 17087175?

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AnotherMOPAR:
Im curious as to others' findings in similar M4ME models on stock mopar 360's
Im reading thru Cliff's book (awesome by the way), and going over measurements to get an idea where things sit technically. Im looking at the suggested recipes for chevy 350's, and noting siilarities as far as a 'ball park' goes.
Mine are as follows:
360ci 252/252 @.410 and 9:1comp
(stock)
Primary Jets "72": .072"
Primary Rods "54M": .036"/.054"
Secondary Rods "EM": .0775"/.135"
Secondary Jets(Mic'd): .134"  (this seemed large to me but i wasnt sure)
Idle Tube: .038"
Idle Down Channel: .044"
Upper Idle Air Bleed: .088"
Lower Idle Air Bleed: .037"
Idle Air Bypass: .093"
Mixture Screw Holes .093"
Float: 1/4"
APT (turns out): 4 3/4
Idle Mixture Screws (turns out): L 3 3/4    R 3 7/8

Some of these measurements seem a bit out of place in my opinion; and im slowly putting this thing back together. At the moment I was going to replace the brass idle tubes anyways with "OE" ones from cliff via carb#.
But since i am having a hard time finding dodge 360 suggestions to recipes i figured this section was the best to place a post in giving its all measurements related to dialing in and fine-tuning the idle system. This particular carb needed cleaning severely and a float adjustment in the least; but I would like to have an 'adjustable ballpark' by the time i reinstall it.

Anyone have similar notes or suggestions on this model?

Cliff Ruggles:
If the carb is being used on a stock engine, then it woln't be too far off anyplace. 

If you use it on a different engine, compression ratio, CID and cam will require carburetor modifications to match the new combination.....Cliff

AnotherMOPAR:
Thanks for the confirmation Cliff; i appreciate it.
Other than obvious crud built up, the only time the carb complained was on an incline under load; hence dis-assembly and inspection [float was suspect].
The lower idle air bleed restriction isn't too small for this carb setup? That was the biggest detail that stood out to me -all the recipes in your book suggest a very consistent .070" opening.

As far as function, besides the float, the carb hasn't suggested a lack of anything in its operation so i wasnt planning on changing any of it just yet. The tubes...since im ordering them...i am open to your suggestions (if other than original should be bothered with)

Cliff Ruggles:
The upper and lower IAB's average fine, so there would be no need to modify them.  The smaller LIAB improves signal to the idle tubes, then it is offset by the large UIAB so it would draw in considerable air and require a pretty big idle tube to compensate.

The factory did things like this on many carbs for specific applications, based on engine requirements.

A little common sense applies here.  In my book we give "basic" calibrations, and specify IAB and MAB sizes.  If your carbs set up is close by averaging the numbers, then there would be no need to open up one IAB and close the other one down, etc.......Cliff

AnotherMOPAR:
Thank you very much Cliff; i appreciate the info for my curiosity. If its not broke, dont fix it!
 :D

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