Section : Ignition and Distributers

Spark Plugs

Posted By : Mark Elliott, 02-Apr-2006, 07:25pm

Hiya All,
I'm very new to all this Triumph lark (but i love it), i have got a MK3 GT6 and i want to change the plugs, the ones that are in at present are Bosch W7D,
Do i go back to Champion N9Y? or does anybody know of anything better?

What do you use?

Cheers

Mark

Followups :

Spark Plugs

Posted By : Leon Guyot, 03-Apr-2006, 00:51am

NGK's always seem to work best in Triumphs.

I think those for your car should be BP6ES or similar, but I don't have my reference material with me.

Don't waste money on Champions, they are nasty nowadays.

Regards

LÃ©on

81-2119

Triumphs since 1978. and still know no better!
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  Posted By : Steve Cureton, 03-Apr-2006, 08:25am
  
  I agree with keeping away from Champion plugs, I regularly had plugs stop working with no apparent reason, two at once on one occassion, and they had all only done a few hundred miles or less. I changed to NGK a couple of months ago and no problems since.
  - Spark Plugs
    
    Posted By : Mark Elliott, 04-Apr-2006, 06:35pm
    
    Cheers!
    
    thanks for the info, NGK plugs have been bought today
    
    Thanks
    
    Mark
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      Posted By : Leon Guyot, 04-Apr-2006, 09:08pm
      
      NGK Stock 7333 : BP6ES is the standard plug, but you can also use the following:
      
      1263 : BP6ET
      7824 : BP6EV
      7727 : BP6EY
      
      7131 : BPR6ES
      6427 : BPR6EY
      7084 : BPR6EGP
      
      6637 : BPR6EIX
      3903: BPR6EIX-II
      6764 : BPR6EVX-II
      
      Check out the NGK website for more information.
      
      Basically, the more you pay the longer they last, but don't expect massive power increases!
      
      I am running an MSD Digital 6 Ignition, with Pertronix in the Mallory Distributor and Magnecour 8.5mm High Tension Leads, so my plugs need to be good to survive!
      
      I am presently running BPR6EIX Iridiums, which are 8 times? harder than my previous Platinums and reputedly last 100,000 miles/set. They weren't very good straight out of the box, but very soon got way better.
      
      Unfortunately, they are a bit spendy and come in packs of 4, so I got 3 packs, or 2 sets which should be good for as long as the engine lasts, and then some!
      
      We will see.
      
      Regards
      
      LÃ©on F Guyot
      
      81-2119
      
      1963-71 Triumph Vitesse Mk.2 Cv
      
      West Coast USA
      - Spark Plugs
        
        Posted By : Mark Elliott, 06-Apr-2006, 10:18pm
        
        Thanks Leon,
        
        BP6ES NGK fitted today, but i can't try them out because we have typical northern weather! RAIN!!!!!!!!!!
        
        Mark
        
        Spark Plugs
        
        Posted By : Mark Elliott, 09-Apr-2006, 06:50pm
        
        Hiya Leon
        
        the NGK plugs have made a great difference!
        
        Cheers for the info
        
        Mark
        
        Spark Plugs
        
        Spark Plugs
        
        Posted By : Matthew Nicola, 30-Jan-2007, 10:28pm
        
        Sorry to drag up an old news thread, but I'm buying a new set of plugs for my mk3 GT6. After reading a few recommendations, I looked on the NGK website. They say that the correct plug for my car is the BPR5EIX and not the ones mentioned in this article.
        http://www.ngk.com/results_app.asp?AAIA=1293825
        
        Have they got their website wrong, or have they changed the product numbers?
        
        Spark Plugs
        
        Posted By : Leon Guyot, 31-Jan-2007, 02:00am
        
        Matthew,
        
        My spark plug lists are at home, but you can read the correct numbers I posted above, the NGK BPR5 plug is intended for the USA GT6 with it's different (lower) compression, whereas the UK cars need the NGK BPR6 plugs.
        
        So unless you have a re-imported USA GT6 with a USA cylinder head, then you need to BPR6 plugs.
        
        Regards
        
        LÃ©on
        
        with British spec Vitesse Mk.2 with GT6-3 cylinder head here in the USA...
        
        note also that I worked 18 months here in an auto parts store and did a great deal of research into this.
        
        Spark Plugs
        
        Posted By : James Fotheringham, 01-Feb-2007, 01:27am
        
        Leon is correct, try NGK.co.UK, the dot com site is for the US.
        
        The Octane rating of your fuel also has a bearing on plug choice, hence the 6's over here (UK)
        
        Spark Plugs
        
        Posted By : Matthew Nicola, 03-Feb-2007, 12:23pm
        
        So, do the platinum or Iridium ones make a real difference? Its just for normal road use
        
        Spark Plugs
        
        Posted By : Leon Guyot, 03-Feb-2007, 04:58pm
        
        I liked the Platinum ones when I used them, but now prefer the Iridium ones, they are MUCH harder and therefore last longer.
        
        They also stay cleaner longer.
        
        Apart from that not much difference over cheaper plugs.
        
        Apart from the satisfaction of knowing you have got the best part available for your car.
        
        Rgds
        
        Leon
        
        ps. years ago, I used a plug in my Herald from Champion, called the L4G, G for Gold Alloy, those worked VERY well with the very high compression ratio I was running with an 8-port 1200 head, but became so expensive that Champion stopped making them!
        
        L