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  '64 1/2 to '73 -- The Classic Mustang
  Vacuum Advance

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Author Topic:   Vacuum Advance
Tom351
Journeyman

Posts: 93
From: Marietta,GA
Registered: Mar 2001

posted 04-06-2001 09:15 AM     Click Here to See the Profile for Tom351   Click Here to Email Tom351     Edit/Delete Message   Reply w/Quote
Ever since I raised my comp ratio, I have noticed a ping under part throttle loads, to save me some time, does anyone know off hand which way to turn the vacuum advance adjusting nut to slow down the advance rate?

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67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Carter 750 CFM, Comp. Cam 477/510 219/[email protected], Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.

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Butch Jennings
Gearhead

Posts: 624
From: No. California
Registered: Apr 2000

posted 04-06-2001 10:10 AM     Click Here to See the Profile for Butch Jennings   Click Here to Email Butch Jennings     Edit/Delete Message   Reply w/Quote
Clockwise should tighten the spring against the diaphram and slow it down.

Steve, we need spellcheck...LOL

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Butch
460 powered 1967 Comet Cyclone
best of 10.27 @ 129.997 1/4 mile
Butcher's Home Page

[This message has been edited by Butch Jennings (edited 04-06-2001).]

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Tom351
Journeyman

Posts: 93
From: Marietta,GA
Registered: Mar 2001

posted 04-06-2001 10:11 AM     Click Here to See the Profile for Tom351   Click Here to Email Tom351     Edit/Delete Message   Reply w/Quote
Thank you, that is what I thought, but I saw something online that said the opposite, but that did not make any sense.

------------------
67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Carter 750 CFM, Comp. Cam 477/510 219/[email protected], Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.

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craigber
Journeyman

Posts: 78
From: Vancouver, Canada
Registered: Sep 2000

posted 04-06-2001 12:00 PM     Click Here to See the Profile for craigber   Click Here to Email craigber     Edit/Delete Message   Reply w/Quote
Hi Tom,

actually it depends on who makes the unit...the Crane unit decreases advance when turned clockwise while the Accel unit does the opposite...go figure!

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Craigber
71 Red Rag

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Tom351
Journeyman

Posts: 93
From: Marietta,GA
Registered: Mar 2001

posted 04-06-2001 12:08 PM     Click Here to See the Profile for Tom351   Click Here to Email Tom351     Edit/Delete Message   Reply w/Quote
It is a stock replacement unit, I guess I will just experiment with it.

------------------
67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Carter 750 CFM, Comp. Cam 477/510 219/[email protected], Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.

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