Originally Posted by
DS Motorsport
I'm not talking about the fitment from the piston to sleeve, that's something i understand.
I do mean the fitment from sleeve to crankcase.
And to me there is no logical way to explain how this affects performance.
The only thing I could think of is a better heat transfer and better support for the sleeve if there is a very tight fitment.
I misread that. Sorry, my bad.
CRF sleeve is like that. Nearly impossible to remove cold.
Are you thinking the sleeve expands less outward because there is no clearance between the sleeve and the crankcase versus a sleeve that just pulls right out? If so, perhaps its more significant as the engine reaches the higher end of the temperature range of the engine. But conversely, wouldn't it make sense to allow room for expansion?