Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: qjetsrule on May 17, 2015, 01:04:42 AM

Title: 3RD METERING ROD
Post by: qjetsrule on May 17, 2015, 01:04:42 AM

IS THERE ANY WAY TO IDENTIFY QUADRAJETS EITHER VISUALLY OR NUMERICALLY IF THEY INCLUDE THE 3RD METERING ROD SETUP. I WOULD LIKE TO AVOID THESE CARBS AT ALL COST. WERE THEY ONLY PRODUCED DURING CERTAIN YEARS. THANKS

Title: Re: 3RD METERING ROD
Post by: Frank400 on May 17, 2015, 02:41:39 AM

    I don't have my Cliff Book here at home right now and surely someone else will chime in, but I think they started appearing in '75 and some '76 had them, some not. 

   I just did some work on a friend's 76 L48 Corvette and it had the original '76 carb, did not have it.  It was one of the "good" ones so to speak.

     Frank.

Title: Re: 3RD METERING ROD
Post by: 429bbf on May 18, 2015, 01:24:46 PM

cliffs book states 75 and some 76 i have a 7045183 that is that design and i just saved it for parts . i think most of the 75 s are that style. fwiw

Title: Re: 3RD METERING ROD
Post by: Ethan1 on May 18, 2015, 03:23:06 PM

Quote from: qjetsrule on May 17, 2015, 01:04:42 AM

IS THERE ANY WAY TO IDENTIFY QUADRAJETS EITHER VISUALLY OR NUMERICALLY IF THEY INCLUDE THE 3RD METERING ROD SETUP. I WOULD LIKE TO AVOID THESE CARBS AT ALL COST. WERE THEY ONLY PRODUCED DURING CERTAIN YEARS. THANKS

 Numerically, yes. Visually, not sure. I know some of the Cadillacs actually had a 4th metering rod. Most were used in 1975 and some in early 1976.

Title: Re: 3RD METERING ROD
Post by: Cliff Ruggles on May 21, 2015, 05:36:07 AM

All 75 passenger car and early 76 will be the early APT system.  Most Old's will have the aux Power Piston and single metering rod/jet.

I avoid ALL early APT carbs here for high performance use, the later design is just that much better.

I still rebuild and restore them for OEM applications, they work OK when done correctly.....Cliff