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07-15-2017, 07:10 PM | #1 |
Senior Member
Join Date: May 2010
Location: Camarillo, CA and Pine Grove, CA
Posts: 2,832
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High compression head and timing?
I have read that when using an aluminum high compression head that it is advisable to retard the spark a few degrees. Why is this? Is this for aluminum only or does it also apply to cast iron?
I have a cast iron 5.5 head and I don't detect any pinging or pre-ignition by running timing in the stock position.
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