Today I got the 4G63T smoker out and pulled it down to see last November's new pistons and rings rattled and smoked.
The bore was (supposedly) lightly honed by two guys who I thought knew better, after all they work on a couple of EVO8's and know Mitsubishi well. Well, hone job was a bit severe. The top 18mm of the bore is tapered, you can see it and feel it with your finger. To put that into perspective, 18mm down the piston is just above the oil rings. No wonder the piston slap was so bad: the compression rings were barely doing their job once the piston reached the last 18mm of stroke. The only solution is of course a rebore, and doing the assembly myself.
So ... on with the 4G64 stroker crank and 2.3L.
Stewart DIBBS