ORIGINAL: tIANci
Breaking in:
Simple, initially run it in for about 5-7 tanks at a rich setting (engine is blubbering and head does not get hot at all, about 110*F), many will disagree with me but all I can say is that we run it in this way and after over 75-100 or so engines, we know for a fact that a rich running in does work for ABC engines. We would run in the .12 modified engines like the Massimo Fantini at about 20 tanks and after that it really peaks hard.
tIANci,
You are correct in assuming that many would disagree...
If an ABC/ABN/AAC engine survives such a cold, rich treatment, it was probably pretty loose in the first place.
Old K&B ABC racing engines often broke their con-rods as a result of such break-in attempts.
Engines used in cars don't usually last very long. Shorter, in fact, then their higher RPM regime would suggest.
Have you ever considered that that cold, rich break-in technique is the leading reason for this?...
The correct method, for best longevity (and shorter break-in too; 15-20 minutes usually) is illustrated in [link=http://www.rcuniverse.com/forum/Tapered%2DBore_Engine_Break%2Din_%2D_Upgraded/m_1850473/tm.htm]this thread[/link].