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Original Message
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| RE: Timing problems - LONG! |
| By Joel - 06/07/2002 8:42:09 AM; IP 12.27.46.140 |
| I'm also in the process of learning about timing. Total timing includes initial and mechanical. Vacuum does not come in to play yet. First off, verify that your dampener has not moved. Get the motor at TDC on the compression stroke of cylinder #1. Your dampener should be at 0 degrees. I'd guess that your getting some mechanical advance in with your initial. At what rpm do you test your initial? If you lower the idle speed, does the timing advance reduce? I need to slow my idle down to 400-500rpm in order to take mechanical advance out of the equation. If I have the initial set at 8 degrees BTC at 400rpm, I see 20 degrees advanced at 1000rpm. If your mechanical advance is on the 15L stop, then it should contribute 30 degrees in crank advance. Hook up a timing light, and test the timing from 500-3000rpm in 500rpm intervals. Do this with the vacuum advance disconnected and plugged. This will show your timing curve and total timing. Run it past 3000rpm to make sure that the advance doesn't go any higher. Only when you get your total initial and mechanical timing dialed in should you move onto the vacuum advance. |
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