Running in a new engine

[darrenjlobb]

In the middle is what you want to do, certainly don't be gentle all the time, that's the last thing you want to do...beat thing is to give it bursts of load / boost, then few minutes gentle, then load it up again, try to vary revs and avoid cruising for long periods at same speed... Only thing to avoid is high revs for first part of run in, so just load it up until 4k ( if derv ) and not much more till its bed in a bit more, but not to long, its important to bed the full travel of cylinder from day 1, and you need rpms to do this.