02anti_vnm

iTrader: (32)

I'm putting my forged 347 back together and I'm ready to gap the rings and just need a little double checking

The pistons and rings are both made by mahle they're flat tops with valve reliefs
I'm going to be spraying a 250 direct port on it and I called mahle and the man said I should gap the top one at .030 and the second one at .023 does that sound about right? I trust the guy just wana make sure

Thanks for any help

WE TODD DID

iTrader: (2)

I'm assuming its a 4" bore? If so, .030 is good on the top ring, but the bottom ring need to be gapped larger than the first.

02anti_vnm

iTrader: (32)

Bump....

02anti_vnm

iTrader: (32)

Its a 3.9 bore but y does the bottom ring need more gap I'm new to building an engine and new to nitrous. I'm just learning as I go

WE TODD DID

iTrader: (2)

If the second ring gap is smaller, it can result in getting gasses stuck between the rings. The engine will actually make a little more power with a larger second ring gap. I do mine about double of what the top ring gap is, but really anything larger than the top will be fine.