Originally Posted by PencilGeek
We all agree that street and racing motors are different. I guess I was making two other points, and probably worded it poorly.
1. On the dyno, we broke in street and racing motors the same. Same methodology.
2. Whether street or racing, we considered the motor broken in when the rings were seated properly -- as witnessed when you stick an endoscope down the cylinder and take a look.
Of course other drive train components need to be broken in as well. That's why I chose my words very carefully by only discussing the break in of the motor.
OK, thanks for the clarification. I think I mixed your post up with another post on this thread by a different person.
In that case, I'd say that it is mainly about the controlled setting and monitoring/measurement issue.
Also, did you actually follow up with the street engines to see how they were holding up with 100000+ miles? And if so, how large was that sample?