1962 WCFB Inlet Fitting

[Richard M.]

Does anyone have a photo of the 3191S (250 hp base '62) inlet fitting face? What connects to it, a 1/4" NPT or a 5/16 (or 3/8"?) flare fitting?

Pic left is from a mongrel WCFB(inverted flare), right is (1/4" NPT) from a used 3191S I just rebuilt. Which is correct, if either?


Thanks,
Rich

[Richard M.]

Re: 1962 WCFB Inlet Fitting

dasdkjvosodpov

[John F.]

Re: 1962 WCFB Inlet Fitting

I don't have time to check mine right now. I'll try to look at tomorrow.
John F

[Kenneth F.]

Re: 1962 WCFB Inlet Fitting

My 1962 WCFB fitting looks like yours on the left. The tubing O.D is 5/16"

Ken

[Joe L.]

Re: 1962 WCFB Inlet Fitting

Does anyone have a photo of the 3191S (250 hp base '62) inlet fitting face? What connects to it, a 1/4" NPT or a 5/16 (or 3/8"?) flare fitting?

Pic left is from a mongrel WCFB(inverted flare), right is (1/4" NPT) from a used 3191S I just rebuilt. Which is correct, if either?


Thanks,
Rich

Rich------


I can tell you that all 1959-64 Corvette and passenger car applications with single 4 barrel Carter carburetor used the same inlet nut. It was GM #3759759, aka Carter #15-70S. It was discontinued from GM SERVICE without supercession in August, 1981.

[Richard M.]

Re: 1962 WCFB Inlet Fitting

OK, Thanks.......It appears the left pictured flare type is the correct one. I'm not sure what the one on the right side is but maybe for AFB or AVS.

[Stephen R.]

Re: 1962 WCFB Inlet Fitting

I have a WCFB with an inverted flare fitting and room for the "brass" filter behind it, your pic on the left. My AFB has the straight in 1/4 tube fitting with no room behind it for the filter. Hope that helps.

[Richard M.]

Re: 1962 WCFB Inlet Fitting

Yes this carb had the brass filter too with the spring behind it, but the fitting was NPT. It looks fairly knew, but I have no idea what it is or it's maker.
Rich

[Stephen R.]

Re: 1962 WCFB Inlet Fitting

If you ever find out what it is, let me know, I could use a couple for my WCFB. I much prefer the direct pipe instead of the flare.

[Stuart F.]

Re: 1962 WCFB Inlet Fitting

I don't know, perhaps my mind is slipping, but I can't ever recall seeing a factory NPT fuel fitting for a direct steel tube fuel line connection. The only thing that comes to mind is, as you say on a 62, would be their use of an NPT tube to an inline fuel filter. The only other application I know of would be for an aftermarket fuel hose fitting that we all used on multiple carbs back in the day.

Stu Fox

[Richard M.]

Re: 1962 WCFB Inlet Fitting

Yes I have not seen a NPT fitting like that ever myself......well, before this one. Here's a picture of the finished carb the new owner sent me with a GF-48 hooked up. Makes a nice easy/clean install IMO.

Rich

[Joe L.]

Re: 1962 WCFB Inlet Fitting

Yes I have not seen a NPT fitting like that ever myself......well, before this one. Here's a picture of the finished carb the new owner sent me with a GF-48 hooked up. Makes a nice easy/clean install IMO.

Rich

Richard------


This set-up appears to have an adapter between the carb inlet fitting and the NPT bushing. It might be a double bushing, too, but I expect it's an adapter. In any event, I don't think a set-up like this was ever used in PRODUCTION.

[Richard M.]

Re: 1962 WCFB Inlet Fitting

Joe,

Yes I agree the GF-48 was never used in production for the 250HP, only the brass "stone" filter in the carb inlet housing. IMO I think it should have been a GF-48 in production though.

This setup is incorrect as far as we are concerned, but the owner wants functionality. In fact, I think it's a good idea........to see all of that sediment in the glass coming from the fuel system due to today's fuels!

I am planning the same setup for a friend's '59 I'm restoring.

Rich

[Stuart F.]

Re: 1962 WCFB Inlet Fitting

My only concern would be air cleaner clearance. If it fits - great! However, most Corvettes have low profile air cleaner housings that fit down below the air horn gasket surface. My 63 is a prime example. I had to use an angled fitting right out of the carb (similar to stock) to get down below the housing and adjust it until the housing did not rest on it (I jacked my carb up with a 3/8" spacer and had to use a hose to reach the filter mounted at the stock water manifold location).

Stu Fox

[Bob B.]

Re: 1962 WCFB Inlet Fitting

Rich,

I'd watch out on the generous use of teflon tape. You were concerned about sediment. Theoretically, the fittings are supposed to seal without the tape. But, if you put the tape too far forward on the fitting, pieces can come off and, if a piece gets in your needle seat, then the gas flow into the carb won't shut off.

Bob