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PAPER OR PLASTIC => For Sale => Topic started by: 1998ccc on April 19, 2011, 07:25:50 PM

Title: FS - S52 Pistons
Post by: 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

(http://m42club.com/forums/picture.php?albumid=173&pictureid=1040)

Title: FS - S52 Pistons
Post by: 1998ccc on April 24, 2011, 05:26:01 PM

Bump for lower price.

Title: FS - S52 Pistons
Post by: KenC on April 24, 2011, 06:47:42 PM

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

Title: FS - S52 Pistons
Post by: 1998ccc 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.

Title: FS - S52 Pistons
Post by: 1998ccc on April 30, 2011, 04:44:38 PM

Top

Title: FS - S52 Pistons
Post by: 1998ccc on May 14, 2011, 08:59:29 PM

Pistons from hell.