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Cars & Coffee Killer
Join Date: Sep 2004
Location: State of Failure
Posts: 32,246
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Quote:
Originally posted by JustinL
I've found that as I get leaner (above 16:1) on deceleration I get lots of popping from the exhaust. This is because there is not enough fuel to get good flame propagation in the cylinder and you end up pumping fuel into the exhaust system where it ignites and pops. Because of this I feel that if the fuel isn't burning in the cylinder, it must not be as efficient.
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This is exactly why running lean has a tendency to burn up exhaust valves.
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Some Porsches long ago...then a wankle...
5 liters of VVT fury now
-Chris
"There is freedom in risk, just as there is oppression in security."
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