MerlinTech wrote:
Do you find it interesting how you can feel the taper and out of round with that hone? I find it very interesting they way you can just work out any issues.
When I was building small race engines, I usually found the second time I did one, the cylinder would be nice and round without taper. I think heat cycles make a difference on those little engines. I spent a lot of time taking friction out of those. At 6 hp, you needed all the help you could find.
I thought you were jerking my chain but the difference between the 2 hones is night and day.....the out of round is obvious and the sunnen hone removes it. I can for for feel even 5 tenths of out of round but being honest I can only feel taper over 1ish thou. the other thing though is the other hone oversized the top and bottom badly...I'll get some pics but that is my biggest issue, the majority of the cylinder is to size, then the top might be a coupe thou bigger and 70 grit so it ends up 3 over finished.....which leave the rings gapped so a 300hp nitrous shot, just as I planned
seriously though, its a frikin good thing I stitched to a gapless second ring so the largish gap won't real have much effect.