Cast or Moly rings for 366NP pistons - '70 383 rebuild? - Moparts Forums

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Cast or Moly rings for 366NP pistons - '70 383 rebuild? #1661079 08/19/14 03:20 PM 08/19/14 03:20 PM
Joined: Feb 2012 Posts: 137 midwest - USA 6 69/70 Plymies OP member
69/70 Plymies OP member 6 Joined: Feb 2012 Posts: 137 midwest - USA	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.

Re: Cast or Moly rings for 366NP pistons - '70 383 rebuild? [Re: 69/70 Plymies] #1661080 08/19/14 04:56 PM 08/19/14 04:56 PM
Joined: Jan 2003 Posts: 75,020 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,020 U.S.S.A.	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 .

Re: Cast or Moly rings for 366NP pistons - '70 383 rebuild? [Re: JohnRR] #1661081 08/19/14 05:16 PM 08/19/14 05:16 PM
Joined: Jan 2003 Posts: 20,796 A collage of whims topside Too Many Posts
topside Too Many Posts Joined: Jan 2003 Posts: 20,796 A collage of whims	Moly.

Re: Cast or Moly rings for 366NP pistons - '70 383 rebuild? [Re: topside] #1661082 08/19/14 08:39 PM 08/19/14 08:39 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	(1) Moly (file fit/plasma moly) (2) final hone with 320 grit dingle berry hone (3) read "breakin secrets" at www.mototuneusa.com live every 24 hour block of time like it's your last day on earth

Re: Cast or Moly rings for 366NP pistons - '70 383 rebuild? [Re: JohnRR] #1661083 08/23/14 04:18 PM 08/23/14 04:18 PM
Joined: Feb 2012 Posts: 137 midwest - USA 6 69/70 Plymies OP member
69/70 Plymies OP member 6 Joined: Feb 2012 Posts: 137 midwest - USA	JohnRR, I will be using the existing pistons. The machinist told me the compression ratio should be +-9.35:1.

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