General Category > Quadrajet Carb Talk and Tips

Float level and other Qs

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Cliff Ruggles:
Shipping to where?

Macadoo:
61753

Cliff Ruggles:
Flat rate shipping this month for any shipments in the USA no matter what parts are purchased.

I would recommend installing new jets with the metering rods, unless you bought them from us.  Currently there are 4 different jets on the market being sold for Quadrajet carburetors and 3 styles do not work.

We sell the correct jets made to OEM specifications so the depth of the orifice in them is where it's supposed to be.

We can also so USPS First Class shipping on very small items for even less if you call the shop directly to order, usually around $3-5 dollars if the total weight is under 1 lbs and they will fit in an envelope of small package.......Cliff

Macadoo:
I called and ordered the parts today (main rods, jets, and secondary rods).  The dude I talked to was really cool and we chatted for a while.  He thinks, and I tend to agree, that the 110 LSA is at least part of my idle problem.  But I'm stuck with it for now so I'll make due.
The other day I accidentally knocked off a vac hose (direct to manifold) and the idle sped up and smoothed a bit.  When I did the mods I drilled the idle bypass in the baseplate (and plugs in the main casting) to .106.  The fellow I talked to said I need at least .110 for my motor.  But .004 doesn't seems like much.  Should I go more than .110?

Carb #17081287

Macadoo:
Okay fellas, I'm having trouble nailing down my tune for this 461.  Seems like I get it close and then I lose it.  I think a lot of it is the 110 LSA on the cam.  I can get it to cruise very smooth and to break loose at the 2-3 shift but it pings at WOT.  So I dial it back just a little and it becomes a turd.  It likes a quick timing curve but the mark bounces around at idle (800 rpm in park).  So I put in stiffer springs (two medium) and it becomes a turd at part throttle. (HEI)
Today I tried limiting the mechanical advance to about 12* and bumping up the initial to 21* and it runs "okay" but I know there is more power there.  I realize that's only 33* total so I need to trim my mechanical limiter a little.  And it's a little hard to start when hot with 21* initial.  No kickback, just a little slow turning over (Summit mini starter).
I'm still dialing in the Q-jet's APT but I've got it close.  No stumble and good cruise mileage (18 mpg - ish with my 200-4r and 3.73s).  That's using Cliff's tip-in method at 2200 rpm.  But I can still pull the AC vacuum hose and increase the idle (manifold vacuum).
Idle tubes are at .038
Down channels .055
Idle bypass air is at .120
Jets: Cliff's 73
Metering Rods: Cliff's 44
Mixture screws are 3 turns out giving me a steady 14 inches of merc
I do have a 1" spacer under the carb for clearance reasons.  That may be part of my low part throttle power issue.  I could probably get away with a 3/4" but not much less.
Engine runs strong and pulls HARD but only if I push the timing past the safe zone.
Thoughts?

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