PR3 pistons in a usdm b18c? ......i heard of people using b16's pistons to get higher compression but not sure......does anyone know if it would even fit right?

 

yes

 

will there be any loss with pr3 pistons in the b18c.......thanks rainforest

 

shold only be gains.
compression will go up to mid 11s

 

is there anything that needs to be replace when installing the pr3 piston

 

rings.

 

rings should be the same for jdm 88-91 pr3's as 94-95 del sol vtec pr3's right?

 

when you are putting the pistons on the rods, you have to make sure there is at least 1/16" play on each side of the rod. this means taking a little over 1mm off each side of the rod, or taking material out from the piston (i'd do it from the rod). that's the only fitment issue.

 

the pistons only need to be opened up if using a b18c piston on a non b18c rod

 

If I were you I'd look into getting .25 OB pr3 pistons and boring your block out. The reason being is that if your engine has any imperfections or scratches on the cylinder walls a simple hone may not be capable of remeding the situation. Its a good idea but you can do what you wish. Also if you are interested in the CR for your motor with different piston applications hit up Jim's calculator: http://www.bojangs.com/calculator/

Brian

 

thanks for the help!!

ill keep everything in mind

 

Do you think there would be any clearnace problems running PR3 pistons .25 over with a 2 layer headgasket on a full B18c block?