Distributor advance question - Team Camaro Tech
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post #1 of 5 (permalink) Old Oct 25th, 09, 05:28 PM Thread Starter
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Jeff
 
Join Date: Sep 2009
Location: MA
Posts: 215
Distributor advance question

My 68 454 has a HEI distributor with the coil on the cap. That coil isnt being used though and a msd box/coil is.
Today i noticed that there is a vac advance on the distributor that has no vac line hooked up to it. Is it possible they converted this to some other sort of advance and that this is not being used? How would i figure that out?
thanks
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post #2 of 5 (permalink) Old Oct 25th, 09, 11:55 PM
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Steps
 
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Location: New Zealand
Posts: 13,316
Re: Distributor advance question

The VA has to be in there to sablise the end piont of the timing....holds it in place
The VA doesnt need to be connected to run....the VA is used to give exta advance at idle and extraadvance at cruise and light load speeds
If the intial (NO VA) is turned right up for good idle, it loads up the starter motor and over advances the cent when under heavy loads.

There are older posts that describe how to set up and what stuff does

My Spelling is not incorrect...it is creative

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post #3 of 5 (permalink) Old Oct 26th, 09, 10:16 AM
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Tom
 
Join Date: Jun 2001
Location: Rochester Mn
Posts: 7,749
Smile Re: Distributor advance question

Read John Z's "Timing 101".

It is here : https://www.camaros.net/forums/showth...ght=timing+101

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #4 of 5 (permalink) Old Oct 26th, 09, 10:43 AM
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Danny
 
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Location: bay area, ca
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Re: Distributor advance question

vacuum advance is pretty good for everyday street driving. Better MPG as well.

Danny
1968 Camaro
2002 S2000
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post #5 of 5 (permalink) Old Oct 26th, 09, 11:26 AM Thread Starter
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Jeff
 
Join Date: Sep 2009
Location: MA
Posts: 215
Re: Distributor advance question

Thanks guys. Just read it. Makes sense. This car was being used as a race car so that explains why it wasnt hooked up.
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