Which heat range plugs?
 

Hi guys,

I'm about to install some IGN 1a coils, and currently running B9EGV's all round.
Mods are stock twins running 15psi, Water Injection, Adaptronic modular, 3.5inch exhaust, front mount, upgraded fuel system, stock ports. Once i get it tuned with the new coils and get the thirst for more power I'll go single turbo.

So Im wondering if i should stick with 9s all round, or would 9s leading and 10s trailing be better? Or wait till I go single before needing 10s?

Thanks guys

Wondering the same thing, anyone have an answer? Should I go colder plugs on 15psi twins with the IGN-1A setup?

Run all 9's and you will be good. More exotic plugs seem to be a hassle more often than not and all 9's on twins does just fine.

Dale