Tu5JP4 Head Turbo build best spark plugs to run?

1. York1366 Established Member Joined: Jan 2009 Louth/Lincolnshire Posts: 1540 Stage 4.5 Litchfield 725bhp R35 GTR

   #1 1st June 2016, 19:19

   Obviously a colder plug than stock needed what's everyone using googled it and saw someone say Evo 8 plugs?
   
   Thanks
   Matt
2. Chipwizards Frequent Poster Joined: Nov 2009 Posts: 576

   #2 1st June 2016, 22:29

   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.
3. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

   #3 2nd June 2016, 08:22

   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
4. Chipwizards Frequent Poster Joined: Nov 2009 Posts: 576

   #4 2nd June 2016, 10:25

   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.
5. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

   #5 3rd June 2016, 08:25

   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
6. user_39461 Super Moderator Joined: Nov 2009 Cambridge(ish), UK. Posts: 10581 BMW 5x M50d.

   #6 3rd June 2016, 09:46

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