Quadrajet question

[Dave F.]

The Quadrajet I took off my engine has a number 7035530, which doesn't match the TIM&JG for my 68 L79. Anyone know what application my carb was for?

[Joe L.]

Re: Quadrajet question

Dave------

I can't tell you the original application of the carburetor but I can tell you that whatever the original application was, it was NOT originally used on any Chevrolet model car. My guess would be that it was originally used for some Cadillac application. Very likely, this carb is a previously re-manufactured unit as produced by commercial rebuilders. With commercial rebuilders, the cores are stripped down and then built up into carburetors for any number of applications which may differ from that originally stamped on the carb.

For components like carburetors, rebuilders have much less "flexibility" as to what a carburetor core can ultimately be used for than they do with components like starters and alternators. However, they are still able to reconfigure and "mix-and-match" components in a great number of ways. For rebuilt carburetors the only thing that matters is the number assigned to the unit by the rebuilder. Usually, this is on a paper tag attached to the carburetor and/or on the box that the carb is supplied in. Neither of these methods of identification usually lasts very long after the carb is installed.

[Dave F.]

Re: Quadrajet question

Thank you Joe. Off to find a 7028219!! Or maybe a Demon! ;-))

[Clem Z.]

Re: Quadrajet question

check the number again because there is no 7035530 listed for a Qjet carb.the number you want is stamped vertically above the secondary throttle shaft on the drivers side of the carb.

[Dave F.]

Re: Quadrajet question

At that location, I have : 7028212 DH. The previous number is in a circle, on the secondary side.

[Joe L.]

Re: Quadrajet question

Dave------

That's different. GM #7028212 is a Q-Jet used pretty much across the board for 1968 Chevrolets except Corvette. It's configuration is very similar to the Corvette Q-Jet except for internal calibration. Once again, I'm pretty sure that it likely got on your car as a commercially rebuilt carb. Commercial rebuilders could easily reconfigure this carb to the Corvette spec and the '212' core is VERY common.

[Clem Z.]

Re: Quadrajet question

the #212 cars,#208 auto corvette,#207 4 speed corvette all use the 71 jet and the 46 metering rod. the HP corvette uses #219 with 66 jet and 36 metering rods

[Dave F.]

Thanks Clem and Joe

So, I'm looking at either rebuilding this one with correct components to be within correct operating parameters, or looking for a "correct" 219 core to rebuild. Any suggestions?