A higher compression engine should have a colder spark plug. The engineers explain that it has to do with flame temperature and overheating the plug. I know from experience that my race engine will melt a street plug. Choose from the following NGK plugs:
Cold Street =
BP7ES Colder Street =
BP8ES Cold Race = BP9EV
Coldest Race = BP10EV
For recessed nose plug see
B8ES.