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Great reading....thanks, Tom!
That article really brings home the issue of compression ratio's effect on spark timing.
I have always been a fan of vacuum advance....however, I think my Mallory Hi-Fire system is mechanical, only. I may look into the possibility of adding vacuum advance....if it needs it. Right now I think the long block is box-stock 1989 Mustang GT/5.0 HO.
Cheers!
Doug
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YD,E./PNB
No names were changed to protect the innocent!
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