Hi,
How do you know that an engine is fully broken in and I can race tune it and jump it at the local track. I have ran 2 tanks idle but giving 1/4 throttle to up temperature a bit and then 3,4,5 tanks on the ground 1/4 thorttle and all the way up to full then cut out to idle for 2 sec and give it some 1/4 throttle always having low rpm. Temp while idle with heater on all the time was 190f and temp while driving was 132f and it is running very rich with tons of smoke and sometimes when going from 1/4 throttle to full throttle it makes that sound as if it is going to flameout but then it gets the gas and works fine .