Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Put my rebuilt 17057229 on finally

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Mudsport96:
Like the title says, finally got around to putting it on the car.  Cranked and cranked.. No start, what the heck it always fires right off no one pump of the pedal. Pump five times, fires runs dies. I'm about ready to give up and it hits me, it won't idle with the brake booster fitting open as a vacuum leak. Well, I feel stupid. So I hook up the line, half a crank and she's idling.

Super responsive in park, I'll let it get to temp tomorrow after work so I can set the idle screws and speed. But, I have till April before I can drive on the streets because of my seasonal plates. So I won't be able to do power and cruise tuning for awhile yet, which makes me anxious... I want to get it on the road haha.

But, that gives me time to do some manifold porting. I've found flow numbers for an as cast Performer RPM and for a ported iron Chevy quadrajet intake. And the ported iron blows the rpm out of the water, but that's another thread of its own.

Mudsport96:
Well, got the car semi-dialed in. Idle is steady at 850 in park and 650-700 in gear. Its a little stinky at idle but, it always has been, I think that's from the 110 LSA and lowish compression of 8.2:1.
Vacuum is 12-13.5" at 850 and 21" in park at 2100 rpm. Did throttle tip in and had 300 rpm rise. Adjusted apt slightly and got a very slight rise so good for the time being.

As for full throttle runs off idle it has a flat spot from idle to about 1800.. I attribute that to the 1000rpm converter. Didn't notice it before the traction bars as it would spin the tires and pull as the tires gained traction. Now that it has traction immediately, it has to fight through the converter till it gets revs up to where the cam wants to pull.
I'll post up more later.

Mudsport96:
So I got to going through my notes on this carb again, and I think I may have missed opening up the lower idle bleed.
Here are the numbers.
17057229

DCRs .050
Idle Tubes .034
Upper IAB .070
Lower IAB .063
MAB .050
Idle Bypass .125
Pri. Rods 44
Jets 73
Secondary Tube Rest. .032
Secondary Rods AU
Hanger J
Fuel Seat .135

You guys think opening the lower bleed to .070 will help lean the idle out some? Or is it that my camshaft on a 106 ICL with a 110 lsa could be the issue? Its also advanced 4 degrees so its really a 102 ICL.

77cruiser:
Sounds like it could be a bit lean. What's your timing set up?

Mudsport96:
Its 14 degrees initial and 36 all in before 2300. Vac advance is currently inoperative, traced a vacuum leak to the advance canister, so its plugged for now.

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