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    #1

    Denso Iridium

    Hi. New to this forum. Have a 1997 M3 auto sedan with several Dinan upgrades (exhaust, cold air intake, airflow, throttle body, front tower strut, stage 4 software and auto chip. 100,000 miles, time to change spark plugs and was wondering if it is worth switching to the Denso Iridium IK20 or IK22 or staying with the stock Bosch.



    Anyone istall the Denso? Review? Gap the IK20 back to .032? Run a colder IK22 with the Dinan mods?



    Thanks for your help,



    Glenn

    Phoenix, AZ
    Tags: None
    #2
    i'm not sure about denso iridium, but NGK iridiums work great, and ur crazy for waiting to 100k to switch ur plugs, i went through a set of bosch in 2 months.. either stick with NGK laser platinums that every one and their mom recomend on the forums or get NGK iridiums.. i dont have the part number, but if u do a search u'll find some more threads on plugs with me posting a part number.. good luck

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      #3
      Glenn,

      I installed the Denso IK20's a couple weeks ago in my wife's '95 M3 auto. I just wanted to try something different so I went with them. They work great. I don't have any dyno graphs proving they are better than the Bosch plugs, but I like knowing they're in there. The idle is great and acceleration is slightly better than before. I left them gapped at .044 since Denso's site recommended this. I can't say anything bad about them at all...

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        #4
        From all the dyno's I have seen they don't add any power unless you are blown. So basically that aren't any better for a N/A car than plugs that cost 1/4 as much.

        Comment

          #5
          Where did you find a set of plugs for $20? I'd hate to see the dyno graph with those in the car.

          Comment

            #6
            LOL! I'm sure the plugs have been changed prior to my recent ownership. At 100,000 miles, it's just time fora level 2 inspection which includes changing plugs - and leaking valve cover gasket - and that impossible-to-get-at A/C microfilter.



            A set of six Denso Iridium IK20 can be bought at Professional Car Parts.com for $53.24 DELIVERED ($8.87 each)

            http://www.professionalautoparts.com/sz_2000_vit--003_f_S162-953_6.html



            eBay has the Denso in many auctions, also.



            Bosch F7 LDCR can be bought for $3.25 each at Racing King Unlimited. A set of six delivered is $24.85.

            http://www.racingking.net/Parts/PartDetails.asp?ProductID=83



            When changing plugs, my labor is the same - so why not splurge the extra $25 for the iridium just to qwell suspicion? Was cuious if there were any downside to the Denso.

            Comment

              #7
              That's an excellent price on the plugs. I paid $79 shipped from www.sparkplugs.com.



              The valve cover gasket is easy. Just be careful when tightening the valve cover bolts back down. I broke one and it was a pain to get another one. I ended up tightening them by hand with just an extension on a socket. Also be sure to put some rtv on the half moons on the dash end of the cover.

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                #8
                Denso and NGK are basically the same thing. NGK doesn't make an iridium for the m3 so you would have to get a universal plug. The part number is 6418/BKR6EIX. They are cheaper then the Denso's, but I would rather go with the Densos since they were designed for our engines.

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                  #9
                  I must say that on a stock engine I have never felt any difference in plugs that were gapped correctly. On any car.



                  -Eff

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