is there any performance gain in a .5 over bore when ur boosting a motor that has been bored to 81.5 ?

 

to get a fresh cylinder

 

im sure there is a minute performance difference that dynos cant even read. Its to get a fresh cylinder wall surface so the rings seat right.

 

ow that xplain lol

 

the reason is to get the proper fit with 81.5 mm pistons so your **** won't sound like a diesel with 81mm forged pistons in a loose stock bore..

 

That was the 2nd biggest NooB question I ever heard....just playing, I run an 81.5mm beacuse I fried all my pistons and melted them and scored my sleeves. It is pretty much standard to overbore on a fresh motor to clean the walls up and achieve good ring seal

 

It's also about the limit for an engine with stock sleeves.

 

I know a guy that has an 81mm Sleeved GSR in his hatch and he just bored it out to 85mm!! I hope it last considering he is going to be running a T3/T67

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96 GSR-T &raquo;</TD></TR><TR><TD CLASS="quote">I know a guy that has an 81mm Sleeved GSR in his hatch and he just bored it out to 85mm!! I hope it last considering he is going to be running a T3/T67 </TD></TR></TABLE>

sounds scary

related, interesting thread:
https://honda-tech.com/zerothread/1149576

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96 GSR-T &raquo;</TD></TR><TR><TD CLASS="quote">I know a guy that has an 81mm Sleeved GSR in his hatch and he just bored it out to 85mm!! I hope it last considering he is going to be running a T3/T67 </TD></TR></TABLE>

Are the sleeves stock or aftermarket?

 

Darton....but still that is alot of material to remove