General Category > Quadrajet Carb Talk and Tips
help with 17082224
bruno:
cliff, i took the carb part to close up the LIAB, and decided to remeasure everything as best as i could. i used my drill bit set, but it is a cheap one, and after verifying the sizes with calipers, it seems i have a bit of a gap in sizes that i need. so here are the sizes:
UIAB- .066-.071
LIAB- .066-071
MAB- .085
DCR- .051-.058
idle tubes- .034-.037(think you sent .036”)
idle discharge holes- .085
idle bypass air- .093-.095
i have not put anything back together yet, waiting to hear your suggestion if i should still close up the LIAB or not. also i’m thinking it needs more idle fuel, so was thinking of taking idle tubes to .038”. again, will wait to hear what you have to say. more questions in next post!
bruno:
are baseplate numbers supposed to match main body numbers? my base plate number is 17060558. everything seems to line up correctly, but thought i’d check, as i have no idea the history of this carb before i rebuilt it. there are no “rebuilder tags” or anything on it though.
i also have a question about throttl blade angle. i will add some pics showing where the blades sit at my current idle setting(750 in park), and fully closed. I assume because i do not have any nozzle drip(i think!) this is fine. but i assume lower would be better?( in which case i would need more bypass air? thoughts?
bruno:
throttle angles
bruno:
base gasket stack. Metal spacer is homemade from sheet metal.
Cliff Ruggles:
I like to see exact precision with these things, it does make a difference.
The hot slot is still open on one end with your gasket arrangement. It still should seal off since you are using the 1/4" thick open gasket in there but for sure I'd put the stock gasket down correctly first, then a metal one over it to completely seal things off, then the others on top of that deal. Currently you are relying on a very small amount of sealing surface just in front of the primary bores to seal things off.....
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