Spark Plugs

  1. Established Member Joined: Jul 2007 Plymouth Posts: 1877 CLio sport 172
    #1
    Whats the best spark plugs i can use on my car? Do Denso or Slitfire make any difference to normal spark plugs?

    Thanks for any help

    Nick
  2. Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..
    #2
    I use Bosh matey,from Halfords......
  3. Frequent Poster Joined: Dec 2007 Sheffield Posts: 873
    #3
    NGK's
  4. Saxperience Forum Bum Joined: Oct 2004 South Posts: 3638
    #4
    tbh NGK's are the way forward, no point spending big bucks on sparkplugs if your engine isnt capable of using them propperly, waste of money

    NGK is cheap and relieable and better then bosch and champ imo
  5. Saxperience Addict Joined: May 2006 Posts: 12553
    #5
    I always thought that it doesn't really make a difference which spark plugs are used...?
  6. Saxperience Forum Bum Joined: Oct 2005 North Yorkshire Posts: 4014 Audi A4
    #6
    A spark's a spark, I reckon.

    Dont spend too much on them. You could also take your current ones out and clean them with a wire brush, then just pop them back in.
  7. Established Member Joined: Dec 2007 Southampton Posts: 2278
    #7
    On a standard or mildly modified engine, use whatever citreon says
  8. Frequent Poster Joined: Jan 2008 Cheltenham Posts: 920 Silver VTR & Gunmetal Grey VTR
    #8
    they all do the same thing as said above a sparks a spark - it doesnt matter until you get up to big big power turbo cars
  9. Regular Poster Joined: Mar 2008 Wirral Posts: 426 Saxo VTR Saxo VTS
    #9
    A thought spark plugs were all the same?? what ever the make?? Ive used in the past NKG,bosh,and champion.....
  10. Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..
    #10
    What ever make you have will only give out the same spark,at the end of the day!!
  11. Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..
    #11
    Nkg plugs are the same as champion and bosh!!.....
  12. L-plater Joined: Nov 2007 Taipei Posts: 63 98 Saxo VTS
    #12
    recon Denso power iridium series, choice the right one and feel the
    differents.
  13. Established Member Joined: Dec 2007 Southampton Posts: 2278
    #13
    Quote:
    Originally Posted by minxie20 View Post
    A thought spark plugs were all the same?? what ever the make?? Ive used in the past NKG,bosh,and champion.....
    No, the grade of the spark plug can change. In big power turbo cars we have to reduce the grade of the spark plug from standard, i.e. 8/9 down to 6/7.

    This is only needed when running high ammounts of boost.
  14. Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)
    #14
    I've never considered spark plugs as a performance mod ie it won't add horsepower in a well setup engine. Thats not to say that they don't need careful consideration though..........

    The temperature rating of the spark refers to the amount of heat that it retains not the temperature of the engine.

    On a road car you would choose to use a 'hot' plug that retain the heat, burns off carbon deposits and allow for a clean firing of the fuel/air mixture when the combustion temperatures are lower (short journeys, stop start driving and when idling and suchlike)

    High performance engines* have a higher overall combustion temperature that can damage these 'hot' plugs. So you choose ones that dissipate the heat to the engine rather than retaining it in the plug preventing cracking / breaking up. These are refered to as'cold' plugs...

    So you choose a grade of plug a few heat ranges cooler than the o/e setup and they cope with the higher overall combustion temperatures.


    Too cold and you find that they foul easily, have poor starting characteristics etcetera etcetera..



    *High performance / Hot engines includes Turbo'd ones, engines run at high rpm or under high load

    Then you've got to make sure they are gapped correctly, the ignition is reliable and isn't weak and the fuel / air mixture is right and ignited at the correct time and you have a working combustion engine..

    My view on spark plug design / construction is that the precious metals, and electrode design are mainly about creating a spark quickly and reliably and also maximising the contact of the spark to the fuel / air mixture in the cylinder. Sure there is more into it but thats the simple overview

    G
  15. L-plater Joined: Nov 2007 Taipei Posts: 63 98 Saxo VTS
    #15
    proper spark do "add" power, and there are proof in dyno for long time.
    spark mod is a little like Exhaust mod; they both won't gain any power
    itself, they just help to push your engine to the limit.
  16. Saxperience Forum Bum Joined: Dec 2005 Manchester United Kingdom (England) Posts: 4229 Saxo VTR '98
    #16
    I put NGK in mine £16.99 from halfrauds! \/\/inner
  17. Saxperience Post Whore Joined: Dec 2005 MaDchester Posts: 8432 Vts
    #17
    ive got NGKR's in mine
  18. Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..
    #18
    Good bit of information there matey!! .....
  19. Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..
    #19
    Well if they didnt spark you wouldnt have use for them matey!!...
  20. Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..
    #20
    Your saying that spark plugs dont give any power?? then you say they push the car to the limit?? how if they dont give any power out put?
  21. L-plater Joined: Nov 2007 Taipei Posts: 63 98 Saxo VTS
    #21
    actually 4 stoke - intake/compress/boom/exhaust all important
    , I'm not good in english expression, you can refer here:

    http://www.team-integra.net/sections...?ArticleID=419