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Old Jul 4, 2012 | 02:04 PM
  #1  
Blackwaterforge's Avatar
Blackwaterforge
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From: Alabama
Timing Advance

How much timing advance should I run with todays ethanol fuel?
How much initial?
How much centrical?
How much vacuum?
How much advance at what rpm?
Engine is a 300 6 cyl.
Carburetor is a carter yf.
Distributor is dual vacuum?
Thank You!
Truck runs ok but I think it could run much better with a distributor recurve.
 
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Old Jul 8, 2012 | 02:48 PM
  #2  
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Harte3
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From: Spokane, WA
Every engine is different. There are no clearly defined one-size-fits-all numbers. Adjust, drive...adjust again, drive again, etc., until you find what your engine likes.
 
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Old Jul 8, 2012 | 06:05 PM
  #3  
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willowbilly3
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From: Black Hills of SD
Yup, and also remember how much better gas was when your carburated 300 was built and the factory spec was established.
I always use the factory spec for adjusting the vacuum advance and check the mechanical with a dial back timing light at the specified rpm. That way you know both of those are working like they should be. A hand held vacuum pump and a good timing light (preferably a digital dial back) are both a must for tuning.
 
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