General Category > Quadrajet Carb Talk and Tips

help with 17082224

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bruno:
i will make a new spacer to cover the slot completely. and find the missing numbered drill i need to measure. thx. will post more questions later i’m sure!!

bruno:
okay, i made a new spacer for under the carb, but the 1/4” gasket above the spacer doesn’t cover the slot in the manifold. the thin gasket under the spacer does, as does the new spacer, but the carb won’t put any pressure on the spacer on that end of the slot. is this an issue? i bought a cheap carb kit for the original carb just to get the thin gasket for under the spacer, and it also has thicker gaskets similar to the 1/4” one i got from you, but none of them cover the slot either. i could use another thin gasket above the spacer, if that would be better. or is there a 1/4” gasket that has the little. kick out on the side to cover the slot? hope that question makes sense.

i also shrunk the LIABs to .068” to see what difference it makes. i’ll let you know that part after i fire it up, hopefully tomorrow.

bruno:
fired up the car today, here is where it stands: all specs the same as before, except for LIAB are .068”, and idle tubes are .038.

idle is great at 750, no nozzle drip. engine slows down when idle screws are turned in all the way, with both having effect. my idle vacuum at 750(with VA connected to manifold), is 17.5-18”. idle screws don’t seem to change vacuum, until idle starts to fall off. currently set at 3.5 turns from seated. tried all the way to 6 turns out, no noticeable difference in vacuum. it does pick up about 60 rpm when i pull a vacuum line off. no real change if i cover primaries, unless i cover them almost completely, then i wants to die.

timing is set at 8 degrees base, plus 17 from VA, for total of 25 degrees. haven’t checked mechanical yet, but none in at idle. (i lowered idle to 550, no change in timing).

still need tires before i can road test. i’m not familiar with knowing where the timing needs to be, so advice there would help. i think the carb idle is where it needs to be, but i’ll take suggestions there too.
not sure what to do next, until road test.

bruno:
should add idle doesn’t burn the eyes near as bad now!!

novadude:
Late to the party, but the cam sounds like a typical generic "RV" grind that has been sold under numerous brands over the years.  I have one in a '69 396 sold by Blue Racer (wolverine gear - used to be owned by crane).  Specs are 204/214 @ 0.050, .476"/.501" lift, 112 LSA.  Allowing for some cam grinding inaccuracies, wear, and measurement error, those published specs almost perfectly match what you've measured.

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