250 Best Spark Plugs for tuned RS250?

Discussion in 'Mechanical - Engine, Gearbox, Exhaust etc' started by Mark_RS, May 24, 2018.

  1. Service time looming and I need to get some plugs for the car. KTec said something about custom gapping them for the car as it has the hybrid stage 2 turbo (or whatever), 60lb injectors and is running 350hp/350lbft. Can someone tell me the best plugs for the car? I used to run 'colder grade' plugs in the past on my Jap cars but god knows now...

    Help :smile:
     
  2. I have the colder grade BKR8EIX NGK
     
  3. Std`s are 7.
     
  4. -Jamie-

    -Jamie- RSM Moderator

    Stock plugs are fine when gapped to 0.6,they are fussy with plugs and ime all the other ones I've tried in it it hadn't liked them
     
    James275 likes this.
  5. Ok so Jamie and T&biskits, what do I buy and from where? Want to know I'm buying the right thing and do not want to have to buy something and then have it gapped!
     
  6. As above ,buy oem and gap them
     
  7. Got mine from Green Spark Plug company, (clubmem10) is a discount i used, about £30 delivered. These are the grade RS tuning fitted when mapping mine.
    NGK Iridium IX Spark Plug BKR8EIX (2668)
     
  8. Will will hve to gap them
    Regardless
     
  9. But did you then gap them? Why on earth do they have to be gapped post buying? Don't like the sound of that!
     
  10. Its because the from factory theyre gap that way, but tuners have found they run better especially tuned on a smaller gap. Dont see the issue, a piece of piss to do.
     
  11. Ok Ryan, I'll go buy a tool now to do it...just not something I've ever had to do before.
     
  12. and it's 0.6mm gap yes?
     
  13. If you were an anal sort of car person, then it would never hurt to always double check the gaps on the plugs are right, even at factory settings

    Yes 0.6
     
  14. If you ask anybody Mikey...I'm all about the anal, although maybe they mean something else?
     
    Jamie230 likes this.
  15. All you need is a feeler gauge and a gentle push on the probe to close the gap.
     
  16. No, checked gap, which was i think 0.8/0.85mm, so left them at that.
     
  17. Would there be any improvement for a mrs with stage 1 giving real 315cv Using BKR8EIX ?
     
  18. Buy oem....
     
  19. after power upgrade and larger injectors (630) its common for the fuel flow to extinguish the flame with factory set plug gap reducing to .6mm gives a smaller but stronger spark helps solve this issue, also running a cooler plug 8 rather than factory 7 helps keep thing cooler
     

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