Author Topic: FS - S52 Pistons (Read 4028 times)

1998ccc · « **on:** April 19, 2011, 07:25:50 PM »

4 shown...1 with a bath. Have all 6 but hard to use the extra two in a M42 build. These will work with the M44 crank for 1958 cc.

$95 obo

1998ccc · « **Reply #1 on:** April 24, 2011, 05:26:01 PM »

Bump for lower price.

KenC · « **Reply #2 on:** April 24, 2011, 06:47:42 PM »

What's compression with the M44 crank and these pistons?

1998ccc · « **Reply #3 on:** April 25, 2011, 08:07:15 PM »

In order to come up with 10:1 in a stock M42, you need just under 50cc of combustion chamber volume...all the bits. The S52 has ~6cc more piston dish but more displacement.

1796cc at 49.5 cc's = 10.1

1958cc at 55,5 cc's = 9.8:1. That does not factor in the deck ht. of the S52 piston 31 mm pin ht. vs.30.4 of the M44 so you gain a couple tenths on the positive deck ht for a touch over 10:1.

1998ccc · « **Reply #4 on:** April 30, 2011, 04:44:38 PM »

1998ccc · « **Reply #5 on:** May 14, 2011, 08:59:29 PM »

Pistons from hell.