3RD METERING ROD

[qjetsrule]

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

[Frank400]

    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.

[429bbf]

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

[Ethan1]

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.

[Cliff Ruggles]

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