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Thread: Bosch super 4 spark plugs!

  
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    Gary_D's Avatar
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    Bosch super 4 spark plugs!

    Well i run on a standard Z20LET map and after running the NGK iridiums for 2 years i decided to try the Bosch super 4 spark plugs.
    So tonight as i started to take the old plugs out i was shocked to find that i could loosen them by hand as all 4 of them were loose.
    Number 1 and 4 threads were covered in oil aswell so might of been loosing some compression who knows.
    Still the engine seems to been running good as they all were a light grey white colour which i believe is a good sign.
    Put the new bosch ones in with a torque of 25 NM and put everything back together and took her for a run and i must say ive covered 50 miles and im very impressed with the super 4's so far.
    Maybe i was not getting the full benefit of the iridiums with them being loose but my car seems to be that bit more responsive in 3rd and 4th gear

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    All the mechanics/enthusiasts(sp??) I've spoke to in the past really don't rate the super 4's. How is it on tickover any missfiring?

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    Quote Originally Posted by mattjk View Post
    All the mechanics/enthusiasts(sp??) I've spoke to in the past really don't rate the super 4's. How is it on tickover any missfiring?
    well ive only done 50 mile so i guess i havent really give them a chance but my idle seems to a little better than before.
    noticable improvement in 4th gear though

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    I'm not a turbo owner, but I use Super 4's and they have been superb, and they were great in my saxo too
    FULL Black Leather Heated coupe interior for sale! £200!!!
    Click Here

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    When I used super fours on couple of other cars, the tips broke off and damaged the engine and I swore I'd never ude them again.
    That was several years ago and hopefully bosch have sorted the problems on them now.

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