427 LT5 Build 2 underway

[Scrrem]

Originally Posted by tpepmeie

I was never really happy with the ring seal on the first build, both from a blow-by and oil control perspective. So, we're now using new pistons, a different bore finish, and new rings. These pistons (430g) are a bit heavier than the featherweight CP forgings I used in build 1, so the crankshaft will need rebalanced. The intention is to get better stability of the piston in the bore.

So what do you think the issue was with the ring seal on the first build? I just recently did a 380 build and only have about 800 miles on the motor but am getting a significant amount of blow-by as well. I was thinking my rings just haven't seated in yet but maybe it's something else. Starting to wonder now. Would be intersted to hear your thoughts.