Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - what should vacuum be - 350 chevy, 9.3 CR, 236 @ .050
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Old 06-24-2012, 09:50 PM
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recurve the distributor to allow 24 to 26deg base timing at idle.

A short limited 10deg advance curve allows this. (26 +10 ='s 36 total WOT advance)
It should have about 6" vac at idle when idling in gear.
800-900rpm in gear.
A stock torque converter will not work. Get a 10" 3500 stall converter.

Reset the carbs throttle position at idle for .020" fuel transfer slot exposure at idle.
Pri and sec.
Use a 4.5" rated power valve.
The more idle timing you give it the nicer it will idle and the better the throttle response at low rpm.

May even like the distributor advance curve simply locked out.
34 to 36deg locked. You are on the border line for this.
give the motor all the idle timing it wants to idle clean.
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