Thread: Cunningham Highway?

Originally Posted by rick130

You still need to bed rings in, although most of that is done in the first few km if you know what you are doing.
Mostly ran race engines in on the dyno, road engines (once the cam was run in on a flat tappet engine, not needed here) you'd find a hill, use a high gear, e.g. 4th, drop the revs and several WOT runs really loaning the engine up to force the rings into the bore, then drive normally until the first oil change, just never keeping constant revs anywhere, sideways up and down the Rev range and try and vary the load.
Cruising on a freeway is probably the worst thing you can do.
City driving probably the best.

And there will still be material left from the machining processes, even when things like plateau honing (I believe I was one of the first builders in Oz to use this process in 1993? Factories and NASCAR had well established this practice by then) Won't get all the machining debris out of the bore, but cleanliness and tolerances these days are far, far better than it was prior to the 80's.

On the street/track cars - I would dyno run in my engines, then out the front and a huge burn out to bed the rings down.

Those were the days