Running In Engines

[bozodos]

there was a fascinating guide on the net about 'breaking in' a motor in the first 5 miles or something of operation being the single most important factor of running in?

http://www.mototuneusa.com/break_in_secrets.htm

basically running it hard to seat the rings and remove the hone marks from the bores as far as I've skimmed though it. Fascinating theory, but I just don't know anyone who's done this.

[_Ryan_]

i have heard thrashing it is better for the rings, and todays supposedly high standards of machining and engineering, you would hope you can get in and thrash... also, dont they test the new GTR with a hotlap or two?

my datto motor was run in on the dyno tuning it and it performed VERY well

Edited May 26, 2009 by Ryan1600

[scathing]

I've heard that if you thrash it straight off the bat, it'll free up faster and make more power early....but the engine life is reduced.

The best advice I ever read about running in an engine is "Listen to your engine builder. They're the one warranting it if it breaks".