Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

fuel mileage with 750 quadrajet

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shadetree55:
stock 305 , 700R4 3:55 gears.  haven't driven enough to really check mileage, only have 229 miles on the new engine

Mudsport96:
I would recommend getting some miles on the car, and with an accurate mileage reading between fill upstairs calculate the mileage. Without knowing where you are starting, you can not make a judgement on whether or not it is getting reasonable mpgs or not. And on top of that, as the engine breaks in and rings seat, it is possible that vacuum signals to the carb will change. Thus negating and changes you make now.

lightning boy:
Don't ever buy a carb with a rebuild tag on it.

Cliff Ruggles:
+2, 3 and 4 on that deal.

Holley is the WORST company next to I-5 to ever touch a Q-jet.  They are "hacked" up Frankencarbs so not surprised if it's not up to par for what you are doing......

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