Posted By: 69/70 Plymies
Cast or Moly rings for 366NP pistons - '70 383 rebuild? - 08/19/14 07:20 PM
What rings should I be installing for stock rebuild b-body 383HP engine. This car is street, daily driver and occasionally hammer down. Want longevity.
Posted By: JohnRR
Re: Cast or Moly rings for 366NP pistons - '70 383 rebuild? - 08/19/14 08:56 PM
Have you already bought the pistons ? Is this a turbo application because you are going to have a low compression ratio , 8.0 ... probably less ..., with those pistons ?
Moly would be better than cast .
Posted By: RapidRobert
Re: Cast or Moly rings for 366NP pistons - '70 383 rebuild? - 08/20/14 12:39 AM
(1) Moly (file fit/plasma moly) (2) final hone with 320 grit dingle berry hone (3) read "breakin secrets" at
www.mototuneusa.com
Posted By: 69/70 Plymies
Re: Cast or Moly rings for 366NP pistons - '70 383 rebuild? - 08/23/14 08:18 PM
JohnRR, I will be using the existing pistons. The machinist told me the compression ratio should be +-9.35:1.