2007 HD High Heat Behavior

Posted by Stephen P Mullen on 1/1/2007 to HD Tech Notes

This was our original analysis of the HD closed loop ECM done in early 2007. While we have learned a great deal since then, much has changed, some of terminology was less than ideal and even a few of our conclusions were not quite correct, but our analysis of the heat and how richening the mixture can dramatically cool the engine was indeed correct.

2007 and Later HD Performance Upgrades

Posted by SP Mullen on 1/1/2007 to HD Tech Notes

The number of 2007-later performance engines is increasing. But Nightrider.com still recommends staying with fairly conservative upgrades.