General Category > Quadrajet Carb Talk and Tips

Idle Channel Restrictions

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Cliff Ruggles:
Set the float at 9/16".

Open up the holes under the mixture screw holes to .089".

The rest will be fine with that engine/cam combo.

I'd use a larger fuel inlet seat.....Cliff

Greasy Harley:

--- Quote from: Cliff Ruggles on October 12, 2018, 12:02:26 AM ---Set the float at 9/16".

Open up the holes under the mixture screw holes to .089".

The rest will be fine with that engine/cam combo.

I'd use a larger fuel inlet seat.....Cliff

--- End quote ---
10-4!
Thank you!

tayto:

--- Quote from: Greasy Harley on October 09, 2018, 03:58:58 PM ---What It's going on:
1987 350 TBI block bored .060 over
72cc Swirl Port TBI Heads
Cast Iron GM Manifold (modified to fit tbi heads)
Elgin MTC-1 Cam
flat top pistons w 4 valve releifs
(machinist said should be about 9.25:1 static compression)
Factory style HEI ignition
4-speed
Building this for low end torque, truck motor.

--- End quote ---
I just got my set of 191 TBI heads cc'd last week and they were 65 cc. 193 castings will be the same FYI. You may want to check your static compression again unless you've worked the combustion chamber then ignore me.

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