Carter 4954S aftermarket Quadrajet.

[Kenth]

I have found the Carter 4954S float bowl has the exact same appearance, calibration, cast # at the rear and stamped # beneath the fuel inlet as the 7029273.

Was Carter on the way to making Ram Air carburetors as well but after making a bunch of float housings got stopped from that for some unfathomable reason to later use those already made float bowls for completely different applications? A lot points to that, but is still speculation on my part. I have discussed the matter with Jon Hardgrove "Carbking" and he has no direct information on this float housing, other than the same as what i´ve found online, that the 4954S would have been an aftermarket replacement for the 1968-69 Olds 350, 400 V8. But then these would lack the hot idle compensator, use the 1969 Pontiac float and have the upper idle air nozzles in the cover instead of the Olds carburetors in the float bowl. Would be most interesting to get hold of a pristine original complete 4954S to check the cover and throttle plate!

Kenth

[Cliff Ruggles]

To date I've not seen a Carter made Ram Air carb in any configuration, original or SR.

I have ran into three Rochester made 7029273 Service Replacement carburetors.   

They made Ram Air SR carburetors but most are 7028276, 7029270, and 7040270.  There aren't supposed to be any manual transmission SR Ram Air units produced, but they didn sneak a few through.   

So I've learned to never say never with these things. 

The Carter 4954S aren't common.  I can't remember seeing any and I've had well over 10,000 carbs come thru the shop before retiring a couple years ago......

[Pav8427]

Just for future knowledge. Is the Carter number referenced just a stamped number on a carter built float bowl? How does one cross Carter numbers VS Quadrajet numbers?
Dont think I have ever seen a quadrajet numbered as a Carter specific part number.
Just a Quadrajet built by Carter.

[Kenth]

Carter made a lot of aftermarket replacement Quadrajet with a 4 digit stamped # for most makes using a Quadrajet from factory.

They also made original factory units for Chevy and Pontiac with the same application numbers as Rochester made Quadrajets. No high performance units though.

The 4954S is some kind of a mystery, i guess Carter was stopped from making a 7029273 after they made a bunch of float bowls for these (before they got the 7029273 number stamped) and they stamped 4954S on it and made an Olds replacement unit of it instead. The 4954S bowl has the EXACT specs as the 7029273 bowl, cast number, stamped number, idle tubes, downchannels, upper idle air bleeds in air horn, lower air bleeds, secondary well holes, no hot idle compensator and a 1969 Pontiac float (not the large Olds float).


HTH

[Pav8427]

Thanks Kenth.
Good info that will be filed away for the future.