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Discussion Starter · #1 ·
Here we go again.Know there are loads of threads on this already have read them all and have probably confused myself.
Have JE pistons 86mm.
Measured them at recommended position and they are 3.5 thou under 86mm as expected.
Question is do I bore and hone to 86mm.+/- 0
or
Bore and hone to 86mm.+ 3.5 thou.
Doing lots of other stuff as well and will be looking for something like 700 hp which may have a bearing on the clearance.
 

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If you went to 86mm and the 3.5 thou over the total clearance would be 7 thou. What does the manufacturer specify as a clearance for the application?
 

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Discussion Starter · #4 ·
JE recommend 3.5thou which they have designed into the piston at manufacture.Just wondering why there is so much debate on subject.
86mm pistons bore and hone to 86mm=/- 0
85mm " " " " " 85mm.+/- 0
etc.etc.
 
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