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Old 04-25-2006, 08:04 AM
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Like Ian, I set timing "by ear". Advance until it rattles, then back off 2-4 degrees, which is also done "by ear". I used to take a light and see what I had for future reference, but stopped doing that as well. If it pings later I just drop it another degree. This can happen not only with different gas, but under differing conditions such as altitude and temps. I used to change timing 2-3 times a year, but now I'm using EFI and don't need to.
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