It's all listed in the Integra FAQ.
Click the link in my signature and scroll down to the Engine Tech Spec posts.

EDIT: https://www.honda-acura.net/forums/s...71&postcount=2 << There's the link. In the future, please use the search engine or review the Integra FAQ first.

The later, more powerful B18B1 motor had marginally larger intake ports and a bit more intake cam duration. The bore and stroke remained the same.

OBD-0 isn't really applicable to the USDM B18A or B18B1; the former wasn't in use until 1991, when OBD-1 diagnostics became mandatory.