General Category > Quadrajet Carb Talk and Tips
Jets and rods after engine rebuild
eightballz:
--- Quote from: Cliff Ruggles on December 18, 2014, 05:30:30 AM ---Correct, the carb has been commercially "remanufactured" at some point, and it's common for them to bore out the threads and install one of those POS pressed in deals....Cliff
--- End quote ---
any chance to "repair" this? like heli coil or use epoxy to install the threaded seat?
Cliff Ruggles:
I would replace the casting, no real effective/affordable repair for that deal. I have a machine shop that can bore out the casting and press in a threaded insert, very expensive operation and we only do that to save really rare and nearly impossible to find units....Cliff
Marx3:
I once rebuild a 69 Cadillac unit that had that kind of seat. I installed the new screw-in seat by applying an epoxy-based body repair glue to the thread and putting it in.
I still holds up going almost 4 years. I dont know if this makes for a sollution worth suggesting, but it CAN be made to work.
eightballz:
installed the jets and rods as suggested above..
after the performance rebuild on the 455 (now 461) you can guess that the idle circuit of my qjet won't allow enough air to flow for a decent idle w/o exposing the transfer slots etc.
to get around 800 RPM i need to open up the primaries wide enough to get nozzle drip.
i already ordered a set of drills etc. to open up idle air bypass and all the other stuff (i.e. idle tubes, bleeds etc.)
my plan is to close the primaries enough to stop nozzle drip and start from there...like not touching the slow idle screw during the process of modifying the idle circuit.
good idea?
float is set to 1/4" ...no flooding or any wet spots around the carb. you can tell that it needs more air by pulling a vac line on the intake..idle gains around 100 RPM and is smoothing out
Cliff Ruggles:
It will need larger idle tubes, DCR's, and some additional idle bypass air for that cam. Leave all the idle and main airbleeds stock.....Cliff
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