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Old 07-23-2010, 02:32 PM   #18 (permalink)
Olympiadis
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Join Date: May 2010
Location: Illinois
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Quote:
Originally Posted by Meph View Post
Is my most efficient SA going to be right before audible pining starts to occur? Tomorrow ill bump the timing to 32 again and see how she does.
Yes, for a lot of engines like yours it is for most of your driving.
It also depends on loading.
The more the cylinder is loaded, then the less it is true.
A loaded cylinder has more leeway between efficiency and knock.
That means you can get away with less SA than maximum and not lose a significant amount of vehicle fuel efficiency.
At low loads there is a greater % loss in vehicle fuel efficiency the further away from maximum allowable SA you get, though it often goes unnoticed.
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