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watsupskip
 Post subject: Skimmed Head
PostPosted: Thu Dec 24, 2020 4:23 pm 
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848cc
848cc

Joined: Wed Oct 30, 2013 7:54 pm
Posts: 47
Location: Sydney
Hi guys I need some help here with a mk2 motor I’m rebuilding. I just measured the chambers on the head with a Burette and it’s came in at 17mls. The head can tell it’s skimmed 80 thou , a bit on both sides.

The pistons are plus 60 thou . What model pistons are available to compensate for this to pull the CR back?
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drmini in aust
 Post subject: Re: Skimmed Head
PostPosted: Thu Dec 24, 2020 6:48 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39752
Location: near Baulkham Hills, NSW
Most replacement pistons eg. Hypatec or Russell Engineering are around 9cc dish, can have this enlarged in a lathe a few cc to compensate for your problem.
Graham Russell is doing this for a friend's 1360S at the moment.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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