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Old 04-07-2014, 03:06 PM   #7 (permalink)
pgfpro
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Quote:
Originally Posted by Daox View Post
Another thing that I think is a big issue, and didn't see mentioned, is ignition timing. I think that after we hit the ~80% load, timing starts to be retarded to avoid knock. This reduces efficiency before the fuel enrichment happens as we're not able to take full advantage of properly timed ignition. I would imagine this leads to lower peak cylinder pressures, and thus lost power / efficiency.
Great point!!!

Here is my ignition timing table on my system. Most timing tables have the same type load verses timing values.


As you can see as load increases timing is retarded.
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