Tu5JP4 Head Turbo build best spark plugs to run?
 

Obviously a colder plug than stock needed what's everyone using googled it and saw someone say Evo 8 plugs?

Thanks
Matt

Yes, the long thread ones I think are fitted to Evo 8-9 and maybe 10. I use the Denso IKH24 ones in my JP4 turbo and they work fine.

yep chip wizards is correct -- do not go buying the hi spec irdium things at £100+ a set -- will foul up very quick -std evo plugs are the job

The ones in mine were about forty quid.
I can't remember if they were Iridiums or not but they certainly don't foul, not doing the driving I do which involves a motorway run every day.
What I've found with Iridiums is that once they've fouled up they never seem to clean up again, unlike conventional plugs. These haven't fouled up yet so I can't comment really.

think it depends on how good the mapping is -so well set -up road car will be fine
but a"once in a while track car" -with extra richness --not fully mapped --as you say once fouled forget it
the price will tell you which type they are i am referring to the ngk "r" spec iridiums
std evo plugs are not as sensitive

have a search on the forum - I think I listed the part number somewhere.