I found this thread on The Samba, where John at aircooled.net helps many users to jet their carburators correctly, but also some megasquirt users..
My AFR target was 14:1 at idle, 12.8 at WOT and 13:1 at power, but at light cruice my target was 14:1
That causes high exhaust temperatuires and hotter running engine. You need to avoid the death zone between 13.5 and 16 This picture explains:
I tried to target 16:1 for ligt cruize, and played with the ignigtion, as less fuel at light cruize requires more advance
Im gettiong closer, but there is still some missfiring with engine spees between 1200 and 2200 rpm at light throttle.
I therefore targeting 13:1 and did some road mapping. I am really happy with the engine now, and the head temperature dropped a bit
I had already pulled back about 2 degree at WOT, as leaner WOT requires less advance than 30-32 degrees
For Decel I targeting 20-22:1
My AFR target was 14:1 at idle, 12.8 at WOT and 13:1 at power, but at light cruice my target was 14:1
That causes high exhaust temperatuires and hotter running engine. You need to avoid the death zone between 13.5 and 16 This picture explains:
I tried to target 16:1 for ligt cruize, and played with the ignigtion, as less fuel at light cruize requires more advance
Im gettiong closer, but there is still some missfiring with engine spees between 1200 and 2200 rpm at light throttle.
I therefore targeting 13:1 and did some road mapping. I am really happy with the engine now, and the head temperature dropped a bit
I had already pulled back about 2 degree at WOT, as leaner WOT requires less advance than 30-32 degrees
For Decel I targeting 20-22:1