Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
idle help
old cars:
Was simply referring to the setup I used. "77 cruiser " understood.
No need to revert to "bashing"
Kenth:
--- Quote from: old cars on June 24, 2021, 01:22:45 AM ---Was simply referring to the setup I used. "77 cruiser " understood.
No need to revert to "bashing"
--- End quote ---
Are you saying you plugged the Truck style single main air bleeds (sizes?) and drilled holes in airhorn and float bowl to copy Passenger car style main air bleeds (sizes?)
Pictures?
Cliff Ruggles:
"Was simply referring to the setup I used. "77 cruiser " understood.
No need to revert to "bashing"
If you consider asking for "details" bashing then you are once again mistaken.
You came on a thread were someone is asking for help and made a few blurbs but not enough detail for them to have something to work with.
I know full well how a SMAB carb could be converted to the earlier design but it would NOT be a good course of action. The SMAB design is much more efficient and why the factory experimented with it in 1977-78 on the divorced choke truck units, then went to that set-up across the board in the early 1980's.
It simply works better and doesn't require nearly the metering area and metering area change from the upper section of the rods to the power tips.
Even so it really has NOTHING to do with the issues that are going on here. The problem is idle and for some reason this engine build isn't making nearly the vacuum that it should. I've built smaller engines with less compression and cam and they made more vacuum at idle with a LOT less initial timing that the big 489 is making here.
I'm suspecting a more fundamental issue like late intake closing, but that's just a guess on the information that I've seen to date......Cliff
old cars:
Are you saying you plugged the Truck style single main air bleeds (sizes?) and drilled holes in airhorn and float bowl to copy Passenger car style main air bleeds (sizes?)
Yes
old cars:
picture
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