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post #1 of 6 (permalink) Old 12-16-02, 02:04 AM Thread Starter
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Ignition Timing - Harmful?

Just wondering which is more harmful for an engine in terms of timing - too much advance or retard.

The reason I ask is that after having my XF on the Dyno (250 Unleaded with crow cam, 465 Holly) I checked the timing and discovered that the guy had set it to 14 degrees. Is this OK or should I set it back to 10 degrees?
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post #2 of 6 (permalink) Old 12-16-02, 02:12 AM
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Dyno tuning usually sets the timing quite well. Unless there are problems, leave it. If you are worried, set it back to 10 degrees, and see how it goes.
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post #3 of 6 (permalink) Old 12-16-02, 03:03 AM
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The more advance the better for performance at higher engine speeds esp with your cam - just as long as it doesn't ping.
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post #4 of 6 (permalink) Old 12-17-02, 02:44 AM
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Be careful about excessive timing. It may not ping in one gear on a dyno but with A/C? on, hot day, through the gears it may ping when you nail it. Auto or manual will both do it.

If you're not driving a manual you're really just steering.
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post #5 of 6 (permalink) Old 12-17-02, 04:12 AM Thread Starter
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Thanks for your replys.
The engine did ping at full throttle in third gear on a hot day so thats why I decided to check the timing. I have since set the timing to 10 degress and the car feels just as responsive low to mid range but it does feel less willing at higher revs. However I have not had any pining since then so I think I will stick with 10 degress.
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post #6 of 6 (permalink) Old 12-18-02, 01:58 AM
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Sounds like you have it sorted now ... is good.
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