Closed Cowl Flaps for Quicker Warm Up

[jetdriven]

It's basically stoichometric, or peak.  

[jlunseth]

Quote: 201er

Max RPM is the equivalent of best power then?

[Shadrach]

At idle speeds max RPM is indeed best power (hense the increase in RPM). However, there no reason that you need best power mixture as your not demanding max power. Also, getting the mixture set exactly at best power idle mixture is an exercise in splitting hairs. Run it as lean as you can smoothly and forget about it.

[RJBrown]

Back when cars had carburetors the idle mix was set with a method called lean idle drop. Most cars were set between 50 and 75 RPM lean of peak. I use this same method each time I set the mixture at idle. I am at 5880' on the ground and if I don't lean this way I will drop a plug. Once taking the runway I enrich the mixture but I do not push the knob all the way in. I leave it out about 1/4" to compensate for altitude. At a mountain airport such as Leadville elevation 9930' leaning to best power at high RPM may be needed to safely take off.