Cliff's Quadrajet Parts and Rebuild Kits

Quadrajet Problem Solving => Quadrajet Parts and Numbers => Topic started by: BumpaD_Z28 on January 24, 2011, 05:05:39 PM

Title: Is 7045212 a good start ?
Post by: BumpaD_Z28 on January 24, 2011, 05:05:39 PM

IS this a good core to use ? what CFM would it be ?

7045212

From what I gather:

1975  4-bbl Federal Standards, Chevrolet, automatic transmission

THANKS ! ~DaVe

Title: Re: Is 7045212 a good start ?
Post by: Cliff Ruggles on January 25, 2011, 05:42:31 AM

Is it a divorced choke or hot air choke model?

Both are good carburetors, emission calibrated, but plenty of potential.  The divorced choke models were smaller cfm, or "750".  The hot air choke models were made in both 750 and 800 cfm models.  Visual identification can be made by looking for the "bumps" in the primary bores as shown in our book.....Cliff

Title: Re: Is 7045212 a good start ?
Post by: BumpaD_Z28 on January 25, 2011, 11:28:38 AM

Quote from: Cliff Ruggles on January 25, 2011, 05:42:31 AM

Is it a divorced choke or hot air choke model?

Both are good carburetors, emission calibrated, but plenty of potential.  The divorced choke models were smaller cfm, or "750".  The hot air choke models were made in both 750 and 800 cfm models.  Visual identification can be made by looking for the "bumps" in the primary bores as shown in our book.....Cliff

from what I know ... divorced choke (coil spring "box" mounted on manifold plate, with rod going to carb) ... Your book is on the way  ;D , BUT I may also fill out a service request on your main page ...

Do you / can you eliminate the choke ? (it's a fair weather only car)

TIA ! ~DaVe

Title: Re: Is 7045212 a good start ?
Post by: 383QJet on February 08, 2011, 07:42:11 PM

Dave, I have an evidently similar Qjet 7045213 (mine was made by Carter).  Would you happen to know if your primary rods are stamped with a "B" or not?

As for the choke, I have removed the choke plate and shaft from the primary bore on all my marine Qjets. No need for choke on the Gulf Coast.

Title: Re: Is 7045212 a good start ?
Post by: Cliff Ruggles on February 09, 2011, 05:26:39 AM

Having a choke is a nice feature on a carburetor. 

Even so, I removed the choke from the carb on my GTO many years ago, and it is NOT missed in the least.  It stays in a semi-heated garage, and only driven in nice weather, when a choke really isn't needed......Cliff