What is the biggest you can bore a jdm b18c block to, without having to sleeve the block? 82mm? ITR, pr3 or p30 pistons? Running with a p72 head. My machine shop said I can bore it out to 82mm max without having to sleeve it so I was just carouse if it was true.

 

yes that is true on stock sleeves..the thing u must be aware of. if this is going to be a boosted engine u dont want to thinin the sleeves too much..all motor will be fine

 

Thanks for the reply, and yes this will be for a NA setup.

 

Does anyone know if RS machine have reliable pistons, and rings? They are the only that will have 82mm ITR spec pistons? Or is the Nippon pistons better?