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Old 05-25-2013 | 07:05 AM
  #45  
jef-lemmens
 
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From: hulshout, BELGIUM
Default RE: Homebuild petrol engine

ORIGINAL: Cyberwolf

Looking very nice, but I have a question. What is the coefficient of thermal expansion between the ck-45 and 7075 Aluminum ?
The coeffficient of thermal expansion for steel is 12 and for aluminium is 23
But I do not calculate that , I use a clearance of 0.002" for one inch of piston diameter
Regards Jef
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