Spark plugs, right for Supercharged Boxster ???

[pk2]

Hi, question about sparkplug heat and superchargers, what to much?.

I’m installing a TPC supercharger in my Boxster tomorrow (hopefully). There’s a spark plug which will become inaccessible & require removing the blower to replace it in the future, I’d like to replace the plugs before I put the blower in.

Several people familiar with this setup recommend stock plugs, definitely not platinum. I read somewhere it had to with the heat producedv and its distribution. I bought what were supposed to be OEM plugs; “Bosch Super plus (FR7LDC+)”.

The number indicates there heat index (?) a “7”. I thought I read “4” was Ideal for superchargers in this application.

Any body with experience, suggestion, etc?

Thanks, PK
P.S. my "O.E" plugs have yridium (yes, with a y) with copper cores. Iridium (with I) is supposed to be no no either.