Cylinder Wall Finish
Cylinder Wall Finish
(OP)
Would anyone like to comment on new trends in cylinder honing of automotive engines ? Diamond stones have been around for awhile, but I hear the trend in the performance industry is turning back to the conventional, silicon carbide stones.





RE: Cylinder Wall Finish
Regardless of the hone material, the typical procedure is a "plateau" honing technique. Using a coarse stone first, and finishing with a finer stone. Thus leaving little "valleys" surrounded by "plateaus".
RE: Cylinder Wall Finish
Steve
RE: Cylinder Wall Finish
RE: Cylinder Wall Finish
RE: Cylinder Wall Finish
Better control of ring land size and finish are also major factors when it comes to ring seal and related bore finish. With the very high vacuum utilized in certain engines I, personally, don't think plateau finishing is so important either, at least not in those engines. The high vacuum levels are probably the main reason relatively low tension rings and very smooth bore finishes can be used and that windage can be brought to such low levels. The usefulness of coatings, like Casidiam, really shine in this type of environment.
Steve