6/1 or 8/1

Discussion in 'Identification' started by listercrazy, Aug 14, 2012.

  1. listercrazy

    listercrazy New Member

    A while ago I found a Lister CS 6/1 with a radiator. The plan is to restore her to original condition and then take her on engine shows.

    I have removed the piston and found that the top compression ring is wider than the next one. In fact 2x normal rings were fitted in the groove. I believe some Listers came out with a wider groove and that this could possibly a 8/1.

    Please note that this is my first try. All help and support will be most wellcome.

    Kind Regards,
  2. Mudmover

    Mudmover New Member

    Hello Deon,
    Not sure on ring groove sizes, but the 6/1's all had cast iron pistons and ran at 650 rpm, and the 8/1's had an
    aluminium alloy piston and ran at 850 rpm. The compression change over valve was deleted from the 8/1 and replaced with a fixed plug in the head. Mudmover.

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