Hi, I'm currently building an 85mm B20Vtec I didn't want to go so far, but unfortunately I had to bore out the block because one of the cilinders was not good enough to keep it on 84mm and 84.5mm was still not enough to the damage that the cilinder had suffer, so I wanted to know if anyone could share his experience good or bad experiences. By the way this is my first post, I live in Guatemala and I'm the first guy in my country building a B20Vtec, I know you guys have done this since 4 or 5 years ago, but we're a little delayed here hehe.

 

85 is the last point of a b20...but longevity is 50/50 at that point i think.....b20 sleeves are very unpredictable.....

 

I would say tune it to perfection. Maybe play on the conservative side with the ignition timing. Or if you just wanna haul *** for a year go ahead and go all out. This definitely doesn't sound like a recipe for a long-lasting motor.
Mad props though for being in Guatemala and doing this.

 

thanks for the input guys, I know I'll definitely must go in the conservative side, I'm planning not revving over 8.5k, I got some 12.5:1 JE Pistons w/eagle H beam rods, KMS block guard and ARP Head studs, I hope it could last at least for 20K miles I'm not planning to use it for a daily drive, only weekends or to take it to the race track.

 

I wouldn't go anything over 84.5mm on a STOCK B20 Sleeves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllMotorMadness &raquo;</TD></TR><TR><TD CLASS="quote">I wouldn't go anything over 84.5mm on (a) STOCK B20 Sleeves.</TD></TR></TABLE>

Have a B20 85mm block bored out not sleeved... seen the same block run 14.1 c/r and last over 2 years (not daily driven) ... I'm currently in the process of sleeving the block because I'm going to be using it for a daily driver... so they can handle 85mm if you're not going to be using it for a daily driver and you are a fairly decent driver