Gyrobob
Serious Thumper
Offline
Posers ain't motorcyclists
Posts: 2571
Newnan, GA
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Oldfeller said, "they adjust their mix ratios on the fly and they have head and plug and oil temp gages already set up"
And what do those gauges show when the mixtures are changed? They show lower temps at rich mixtures and lower temps at lean mixtures and highest temps at 14.7.
In our motor, the carb is a fairly crude instrument, compared to computer operated FI systems. The best we can do is operate as lean as possible while still having a smooth running motor.
If I were messing around with jets, I would start with an obviously lean situation,.. running not so smooth, and then richen it in gradual increments until things smoothed out.
If running lean were risky, and caused engine damage, why would those many thousands of light-plane operators, whose air-cooled engines are worth a year's pay for most us, intentionally operate lean of peak? They do that because the engines last longer, due to cleaner burning and lower temps.
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