Don't put your faith in numbers!!! The track is the ultimate dyno. RPM will do nothing if you don't have your car setup right, or your gearing down. Take a look at Big Jims forum on About.com he has a very good motor forum, he's the guy that designed the P2K for Trinity. By the way I have had GM3s with 21,000-22,000 rpm that did much better on the track then my highest rpm GM3 over 25,000 on the dyno. Trinity's numbers on their GM3s are before the brushes are even worn in, these generally give higher rpm and lower power #s. Make sure your comm is perfectly round and then let your brushes fully seat themselves before dynoing them. These will be more accurate and thus you can properly guage your gearing!