Oh purleeeze Dar, will you stop trying to perpetuate this myth. That is absolutely, totally and completely wrong. In fact, the way you suggest doing it in your thread (500-800 below peak) is more likely to cause some damage than running it too rich. I've been there, done it and proved it on a real engine rather than just reading books and repeating what they say as can be seen in [link=http://www.rcuniverse.com/forum/m_2875125/mpage_1/key_/tm.htm]this[/link] thread.