Stop in for a cup of coffee
Hey Krazykuda A question for you if you don't mind. I just received my new engine from Blueprint and they ran it on a dyno so is the break in done or do I need to keep it under a load when I get it running.
Ask Johnny, good question!
@johnymac
I would think that it depends on what kind of cam is in it and how long they ran it on the dyno...
I hope that they kept the RPM's down until it warmed up, cold start is when 80% of wear happens... I make a rule to try to keep cold engines under 3000 RPM until they reach running temp... After it's warm, then go ahead and run it higher RPM....
If it has a flat tappet cam, they should have broke it in fully on the dyno, as the first starts are supposed to be to break in the cam....
It's not so critical to run a roller cam engine for the 45 minute break in like a flat tappet as their is less friction on the cam surface with the roller lifters...
So in short, they should have run it for the full break in when they ran it on the dyno no matter what cam is in it, but Johnny Mac should answer that...
At the engine factory, we had a roller cam and we just spun them on a cold test stand without firing them up... We would monitor the oil flow pattern, valve timing, and could catch a closed spark plug gap, plugged oil squirt hole in the connecting rod, timing chain off time, etc... We never put any fuel down them in the cold test, just basically priming the oil system and catching any build defects as that is where we would fill the oil... The oil fill was the first thing done before rotating the engine....
Roller cams are not as critical to do the cam break in as the roller doesn't have the same surface contact and rubbing action that a flat tappet cam does...