Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
1967 - 7027240 - Fuel Inlet Upgrade - Needle and Seat Kit
Cliff Ruggles:
We do NOT allow any epoxy to get under the screw in plugs, as it can get loose and plug up passages in the carburetor.
Page 71-72 of our book describes the process, and we recomend using "fuel resistant epoxy", which JB weld is not. It will soften up and fall off over time.
Marine Tex is excellent, and Devcon makes a similiar product that will hold back fuel....Cliff
65WildCat:
Thanks Cliff, Found some Marine Tex for the next time. Until then I'm enjoying my new carb. Just drove from Orlando, FL to Massachusetts with no Problems. Except for a bout of 1 hour Vapor Lock right on the Jacksonville FL I-10 / 95 Split Bridge over the bay. Great View Of the City while getten Tan / and of course - Smiling at all the pretty gals as they poke on by..... while letting the engine cool, taking it all in stride....
Happened with the Original Carter Carb in High Heat - Slow Rush hour traffic as well.... I would guess all the PRE - electric fuel pump car would do the same. Don't see so many cars on the side of the road with there hoods up anymore like you used to.
Anyway - I'm very pleased with the overall result.
Pulling a Tow Dolly loaded with a 1993 pontiac sunbird.
My 65 Buick WildCat GreatDale HouseCar.
Averaged 10 Miles per gallon over 1200 miles @ 60 - 65 mph Cruise Control
Power was up and more responsive than before.
One 250 mile section of road was 13.5 mpg @ 15 to 16 steady on the vacuum gauge -- Then into the east coast hills.
Thanks Again -- You Took the Mystery out of Doing the Quadrajet Conversion from my old Carter.
Jim --- Kudos
Cliff Ruggles:
Good news, glad it's working out for you.
The biggest problems we see these days is from the ethanol enhances fuels. It is hard on anything rubber in the carburetor. If you used Viton parts, fuel inlet seat and accellerator pump, it will be fine for many miles.....Cliff
65WildCat:
One problem I'm noticing about this set-up..... Is when I goose it for a while.... Goes real good for a little bit, then, fuel runs short I guess, and it starts to buck a bit... I let off the pedal and let the fuel refill the bowl.... Runs fine again... Is this because of the older large float design, small fuel bowl??? The conversion needle and seat kit not flowing enough fuel to keep up....maybe??? I did not use the spring on the needle to the float as stated in your book... other then that, Perfect Daily Driver..... Feathering it..... Maybe I should start looking for a newer 800 cfm core for my next expirement......
Jim
Cliff Ruggles:
Those upgraded fuel inlets seats usually have a really small hole in them, so that's the place to start if you are having fuel starvation issues at WOT.....Cliff
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