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Old 01-02-2013, 08:35 PM   #1
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Default On cranking advance...

Why is cranking advance less than idle advance on MS2?

I had a conversation with Dimitris about this a few months back, and he was concerned about starter kickback.

But, in my experience, a higher (to a point) cranking advance means quicker starts.
If you were to deliberately retard the advance on a distributor setup, you would see that while cranking rpm increases due to less resistance, it takes longer for the engine to fire.

I mean, on a conventional distributor engine, cranking advance = idle advance.
And, on vacuum retard setups, cranking advance is even higher than idle advance - there's little or no vacuum while cranking, and once the engine is idling, manifold vacuum retards timing, allowing to increase to a preset value as vacuum decreases with the opening throttle.

So, could you guys please explain why I should not raise my cranking advance to 16 degrees from the initially preset 6 degrees?
I have been experimenting with 12 degrees, with much improved results so far..
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Old 01-02-2013, 08:39 PM   #2
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I use 18. Ymmv
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Old 01-02-2013, 08:41 PM   #3
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Hmmm.. I'll give it a try. Lemme fire up the laptop.
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Old 01-02-2013, 09:15 PM   #4
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Thanks Brain, much better now with 18 degrees.
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