Cast vs Moly Rings

joec said

cast rings will work fine,they seat quick ,usually have less cyl wall tension,and are cheaper.But they dont seem to last as long as moly.

Click to expand...

hi, the advantage of moly rings , is they will seal at wide open throttle. fuel washes the bores down, no oil , cast rings then loose their seal. moly ring is self lubricating, it will seal. as for wall tension, you will find moly ring usually has less tension. there is power in a good moly ring combo. we use them in our stocker and street engines. just food for thought.