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10-07-2010, 12:05 AM
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#1 |
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Registered User
Join Date: Jul 2010
Location: Central IN
Posts: 87
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Big block timing?
What are you guys with big blocks running for timing? I am talking about high idle timing, as in max timing. I set the timing at 32* like all the old muscle car forums said and the motor did not like it, simply sounded like to much, spark knock when hot at WOT, I turned the timing down and it seems happier but I just don't know what a good number to run is.
In the GMPP catalog I see the lower HP 454's don't run as much timing as their big HP motors so I feel like I am on to something. Thanks guys! Last edited by Shawn5488; 10-07-2010 at 01:20 AM. |
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10-07-2010, 01:13 AM
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#2 |
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Account Suspended
 Join Date: Dec 2008
Location: Huntsville,AL
Posts: 2,119
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Re: Big block timing?
15 initial 36 total 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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10-10-2010, 01:19 PM
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#3 |
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Registered User
Join Date: Jul 2010
Location: Central IN
Posts: 87
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Re: Big block timing?
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10-10-2010, 02:01 PM
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#4 |
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Senior Member
Join Date: Feb 2010
Location: Maumelle, AR
Posts: 478
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Re: Big block timing?
Not all big blocks are created equal. Depends on chamber size, compression ratio, spark plug heat range, fuel octane rating, etc. I don't worry about numbers. I use my ears and set it to what makes the engine happy.
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10-12-2010, 01:11 AM
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#5 | |
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Account Suspended
Join Date: Dec 2008
Location: Huntsville,AL
Posts: 2,119
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Re: Big block timing?
Quote:
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