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Old 04-29-2008, 12:57 PM
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Getting the timing right on a 383 with Vortec heads

Hey everyone. I'm getting ready to fire my new 383 up. I have a comp 268XE cam and vortec heads. I believe compression will be about 9.7 to 1, and I'll be pumping 93 premium. I wanted to ask what base timing numbers should I be setting it to, intial? advanced? The more I look, the more confused I make myself. Thanks!

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Old 04-29-2008, 01:31 PM
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There's no golden rule that if you have this you must use this timing, it's more of a trial and error. Adjust to what your engine likes, play around with it. My 383 with TFS 195 heads and about 9.6:1 CR likes 17 initial 35 total. But you will probably see all kinds of figures if everyone just started posting their ignition timing.
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Old 04-29-2008, 01:37 PM
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Vortec chambers are very efficient and will probably require less timing than conventional designs. Start at 32* initial/centrifugal.
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