dunked dc

hey so i blew my high compression pistons in my b18c1. the block is bored 050 over to b18c5(i had jdm type r pistons .050 over in there). I have a turbo kit on now so im rebuilding it low compression, the pistons im getting are availible in standard 81mm bore, 81.5mm, 81.75, and 82mm, My block is bored .050 over so does this mean i get 81.5mm? Just dont wanna mess up, THANKS!

JdmTypeRdc2

iTrader: (1)

You realize that .050 is pretty much nothing.

I always thought that JDM ITR pistons were only available in standard 81, 81.25, 81.5, 81.75 and 82mm. I have never heard of a JDM ITR being available in 81.050, since that is pretty much a standard 81mm.

Are you maybe referring that you have 81.5 over ITR pistons. Because .050 seems wrong to me.

sc34dc4

iTrader: (1)

I think it's probably bored 20 over and takes 81.5mm pistons and he is getting really confused.

fv8s

Yes he has no idea what is going on with his motor.

fv8s

You most like have a block that is .20 over which makes it an 81.50mm bore opposed to the stock 81mm (B16a/b/B18c1/c5/b1/a1..etc). If the cylinder walls look somewhat decent with no scoring or signs of uneven ware you can possibly obtain that bore size. 82mm + boost is an Epic Fail

dunked dc

the pistons have 050 stamped on the top

dunked dc

everything is new i just bought the block rebuilt i picked it up at the machine shop i never asked because it came with the pistons and it blew under 5k

95 integra

iTrader: (2)

050 could mean just about anything, including 50 thousandths overbore (.050"). Plus if you "blew" your pistons, chances are you need to overbore the block again. Either take it to a machine shop or get a caliper and measure it....if for no other reason then the fact that it blew after 5k the first time and it could be because somebody didnt use the right size pistons in the first place.

dunked dc

all the piston walls r good i dint blow a piston blew the rings in cylander number 3

94 ls-r

Best bet would be to get a clean bore on it just to be safe. They can tell you the exact size when its done.