I have pct pistons on my b18c engine and i want to now what spark plug i need to use to get best results..

Thanks

 

Thats a 13:1 compression train wreck. I've done it. Not fun. Something heat range 7. 8 if it pings. Gap at .33 and go from there. Get it tuned before you even start it.

Ctr's belong in one motor. The b16 they came in.

Just read this https://honda-tech.com/forums/all-motor-naturally-aspirated-44/attn-people-who-rebuilding-gsrs-2884964/