if i were to put ctr pistons in my b18c1 do i need to get oversized pistons or can i use the standard??? thanks

 

If your cylinder walls are in good shape, you can just lightly go over them with a bottle brush or cylinder hone, and use standard size pistons...but if you have deep scratches in the walls, you will need to get them bored and use oversized pistons...

 

If you get the ctr's, then I would get the overbore. Unless your car has lots of miles 100K+, then I have read that the walls would be ok...but I would get the overbore just to be safe..what if the ******* at the machine shop gets too happy shaving the walls..id just tell him to overbore .25 and get it over with...no blowbye..But if you get the spoon jdm r's then they dont make them in oversize..I plan on getting the .25 overbore ctr's in my b16a..

good luck

 

OVERBORING DOES LITTLE FOR THE EXTRA MONEY, EFFORT, AND TIME IT TAKES TO DO IT. ONLY DO IT IF NEEDED BADLY(LIKE DEEP SCRATCHES)

 

i have a 97 gsr motor and i take pretty good car of it...if there any way to tell if you need to get oversized without taking apart the motor? i just dont want to buy a set of standard sized ctr piston and end up finding out that i need to get oversized...thanks