Melted piston using methanol

[johnb]

Has anyone melted or seized a piston using methanol and gasoline? My #2 melted and seized on the first hard lap at the track. #2 cylinder is under suspicion because it dropped the plug electrode last year. We are looking for something peculiar about #2. Apart from probems with individual cylinders, has anyone melted a piston with the fuel tuned on the rich side of max power? In this case using 20% methanol mixed with 98RON gasoline, the measured fuel lambda is 0.8, and on the dyno it loses power with richer fuel air mixtures. The EJ20 easily makes 334hpatw at the limit of the 400hp turbo at 23psi
using 20% methanol. By comparison it makes 280hpatw using straight 98RON gasoline. The ignition is advanced by 7degrees using 20% methanol.

Experience appreciated,
John.