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Old 03-01-2012, 06:20 PM
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tunning my 78 460/429 dove heads

at what dgr should i set the timming? i've got it @ 20 adv now and experincing a ping on excel and it wants to diesel when i shut it down.

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Old 03-01-2012, 07:33 PM
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If you are talking 20 degrees initial timing, I'd say that's a little much. Around 8 would be better, at least a place to try and see if it likes it or not.

What is your idle speed? If you are dieseling after you shut off the key I would first suspect a higher idle than what it should be. Stock idle is around 700.

Also, maybe check for vacuum leaks.

Mm
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Old 03-02-2012, 08:58 AM
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My 79 460 calls for 14* from the factory. TRy that.
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