When it comes to piston/ring installs, my experience is mostly limited to 4-stroke and 2-stroke motocross bikes. Many times pistons have marks in the ring grooves where the end gaps are supposed to be. On my 2 stroke there are no oil rings, just 2 compression rings and they don't have a top or bottom and the gaps are offset by about 1/4 turn from each other and face the intake side. I would say in general it's always a good idea to never have the gaps line up with each other so this diagram makes sense to me because all the gaps are offset from each other also the end alignment on the oil ring expander is important. I have no turbo experience so I can't comment on how that might change things. Hope that is helpful.
Hi. Eric at DAS has been using gap less rings Total Seal rings. They recommend 1.2 mm top ring. Busa have 1mm top ring. We will decide if I will have the pistons machined to 1.2mm or keep it at 1mm soon.simply read the manual
it explains everything pretty well.
Hi. Yes it is because that I will be using methanol. You can also use them on gas motors also. I will also be changing my oil after every race day. I also need to look into finding a way to how much methanol is in the oil.
