Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Qjet building

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comp:
 OK,,is there enough ajustment to play with fuel ???

Cliff Ruggles:
I'm not sure exactly what you are asking?

In any case, the large main airbleed Chevy q-jets are very difficult to tune, especially with modern fuel blends on high performance applications.  We have had excellent success installing the smaller main airbleeds, and our custom jet/metering rod set-ups. 

Basically, the large main airbleeds add too much emulsion air to the main system, and require HUGE main jets and very small metering rods to get a decent fuel curve.  They still don't work nearly as well as when the smaller main airbleeds are installed right from the start......Cliff

comp:
sorry,,,was thinking about E85 mix's,
 if i set it up then add a 50/50 miv can i adjust for it without a major tare-down ??

Cliff Ruggles:
Adding different blends of ethanol are going to require recalibration of the carburetor, since the ethanol does not contain as much energy as gasoline......Cliff

Hotrodrobert:
1.5 rockers on your exhaust will help torque at all rpm.  The Air Gap intake will also make more torque and horsepower at any rpm above idle on you engine!!

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