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smelly
 Post subject: crank shaft.
PostPosted: Sun Sep 30, 2007 7:46 pm 
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Joined: Tue Jun 12, 2007 8:28 pm
Posts: 229
Location: In Hell
Who knows any thing about rollsroice casting cranks for mk 1 cooper s motors ?
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Morris 1100
 Post subject:
PostPosted: Sun Sep 30, 2007 7:56 pm 
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Joined: Wed Jul 21, 2004 10:32 pm
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Rolls Royce never cast cranks for the Cooper S Mk1.
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drmini in aust
 Post subject:
PostPosted: Sun Sep 30, 2007 7:57 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39754
Location: near Baulkham Hills, NSW
1. Cooper S cranks and ALL other Mini cranks are FORGED steel, NOT cast.
2. Mk1 Cooper S cranks are EN40B steel, forged, machined, ground, then nitrided.
3. I have heard Rolls Royce did the nitriding, I dunno if it's urban myth, or not. :wink:

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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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