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05-10-2010, 03:03 PM
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#1 |
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Registered User
Join Date: Mar 2009
Location: norman okahoma
Posts: 269
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Big Block ignition timing
I need some help with ignition timing. Its a 462 10 to 1 compression oval port heads with big valves .590 intake .610 exhaust camshaft single plane intake holley 780 MSD HEI. Current timing is 15 initial 36 total. Any help would be greatly appreciated.
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The TEAL GMC build thread is HERE 1972 GMC SWB 454 oval ports TH400 fastest 1/4 mile time so far 13.05 @ 104 If you think you have too much horsepower you obviously have a traction problem ! |
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05-10-2010, 04:30 PM
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#2 |
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Jason
Join Date: Sep 2008
Location: Wetumpka, AL
Posts: 152
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Re: Big Block ignition timing
That should be in the ball park. Just listen out for any detonation while driving and if you are getting any now you may want to try it at 34 degrees total with vacuum advance disconnected.
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05-10-2010, 10:43 PM
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#3 |
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My Carbon Footprint
Join Date: Oct 2008
Location: Orygun
Posts: 5,527
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Re: Big Block ignition timing
Both my big blocks seem to love about 18* initial and 36* total.
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