So I'm looking for a set of pistons for my B18c and I'd like to stay pretty close to factory compression ratio as I'm pretty happy with the drive ability on my current setup. I'm seeing a lot of options for 9.1 B16a pistons which i believe would put my B18 at about 10.1? I know they will fit and work just worried about compression ratio cause I plan on only running 93 octane. I've done some searches and I'm finding a lot of mixed answers. Just wondering if anyone has any experience with this?

 

With modern engine management, there is absolutely nothing wrong with running 10:1 compression... or more.

 

https://www.zealautowerks.com/bseries.html


This is a good resource to reference