Carb Sync

Hi Larry,

I like to do my carby synchronisation at several rpm's.

I start at about 2500 go to 3000 - 4000 - 5000 rpm.

When I think I have got the synch as good as I can, I check from  about 2000 rpm, back up the speed range and down, pausing at each rpm to allow the engine to settle.

Low engine speed (high vacuum) will highlight any variation between the carby's.

High engine speed (low vacuum) will be hard to see variation BUT is where you want the carbys to be in best synch.

By moving the throttle slowly & pausing, up & down the speed range, you are also checking for throttle smooth operation (cable sticking or not).

Your carby balance tube will accomodate small variations in synch but still best to have synch as close as possible.

Be sure to secure (anchor) your aircraft before high rpm checks.

Hope this helps  😈

Most of us sync the high rpm at 3300 - 3500 rpm. This way the sync stays together as the throttle is increased. The 2500 is too low and too far into the idle circuit.