Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

WOT A/F tuning question 73 455 Pontiac carb

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Cliff Ruggles:
For sure 74/41 would be rich on the primary side with that carb number. 

If you are happy with the primary side tuning and how it works, use the secondary metering rods to tune full throttle.

Since metering rods have different dimension, taper, tip length, included angle to the tips it sometimes becomes difficult to tune with them at WOT.  I use and prefer custom machined rods for that purpose, so we can make educated changes without changer hanger height.

I'd try going to metering rods with larger tips until you get the A/F in the range you are looking for.  We can machine any size you would like, or several sets in different sizes for that purpose.....Cliff

jlutz455:
Cliff...so you could machine a 44 primary rod with a 0.036" power tip?  If so that'd be great, how do I order that?

Another thought, if my power piston spring is too light, would that cause it to be rich at WOT ? 

Cliff Ruggles:
No, we don't machine primary metering rods to tune full throttle A/F, we use the secondary metering rods.....Cliff

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