would a slight bore be need on my B18A??
 

i have a B18A that im gonna boost the hell out of lol. a good friend of mine i are having a slight dis-agreement.


would i need to bore .5 over on a motor that was running that i dis-assembled and am going to put new pistons in? better safe then sorry or what? the walls looks good.

Re: would a slight bore be need on my B18A?? (shocker911)
 

dial-bore gauge and some visual would answer this question! https://honda-tech.com/forums/images/smilies/emthup.gif

If your unsure, and don't have the proper tools, take it to your local machine shop.

Re: would a slight bore be need on my B18A?? (Running925)
 

the walls might look good, but for boost you need larger piston to wall clearances to compensate for expansion. Clearances are different between manufactures. At least hone it if your clearances are good.

Re: would a slight bore be need on my B18A?? (ABK)
 

get it bore .20 (81.5)with .004 piston to wall clearance for that magnificent numbers of boost

ill bore it to 51.5 just to make it on the safe side. thanks for all the help guys much appreciated

Re: (shocker911)
 

you mean 81.5mm