Originally Posted by chip-3door
This one should end up with a fair bit of discussion!
Im of the belief that you cant run rings in the way you described, due to the fact that if you do it like that its my belief you will see excessive piston ring blow by and this will stop them becoming air tight in the first place, so i always give them longer at small throttle openings and at lower rpm.
But the basic principle of increasing the load i do stick to, just over a logner period of time.
Its an interesting point you make though about "using up" the abrasive marks on the bores before the rings have really bedded in if you are too gentle.
I think of all the technical disucssions on here currently this one could be the one with the most actual discussion in it as its such a black art and everyone has their own preferred method of running in!
Absolutly. This is MY preferred method and has worked for me. Everyone has thier own special ways of doing it. But as you say chip, I expect most tuners these days will not recomend 1000 miles of tootling around, as used to be the typical method.