JCW GAPPED!!!!

Discussion in 'Tuning and Performance' started by Namikuz, Jan 16, 2020.

  1. Namikuz

    Namikuz Member

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    #1 Namikuz, Jan 16, 2020
    Last edited: Jan 16, 2020
    So, I have a new to me, very clean '09 JCW, serviced before I purchased, and under high boost, it dropped cylinders badly, pulled all 4 plugs, yup,NEW!!!! THEN checked the gaps.... Yah, .038 to.046....Hmmmm, blowing out da candles, gapped to .028, ALL BETTER!!!!!
    GEEZZZZ, well, goes to show ya, out of the box, in to the car.....techs now-a-days......
    SET DA GA
    P!!!!!! LOL!!!!!
     
  2. MCS02

    MCS02 Moderator
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    Gap? you mean like the store? I thought you put parts on a car till it ran better.... :D
     
  3. Dave.0

    Dave.0 Helix & RMW Powered
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    I check the gap of every plug before it goes in my car.
     
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  4. InstrumentOfPeace

    InstrumentOfPeace Active Member
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    No silly! GAP. Generally Accepted Accounting principles.


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  5. InstrumentOfPeace

    InstrumentOfPeace Active Member
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    A serious question regarding a gap.

    Is gap specific to the engine or the plug?

    I ask because in the older vehicles I’ve owned the gap was posted on the hood and seemed to remain constant irrespective of a plug’s maker. For the N18, I’ve read varying plugs gaps based on maker.


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  6. MCS02

    MCS02 Moderator
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    I use NGK they should be pre-gaped. Some modern plug are not adjustable. If you check the gap you have to be careful due to the small electron. The Bentley manual does not give a gap. I change my plugs more often then I do something like my old bike.
     
  7. Dave.0

    Dave.0 Helix & RMW Powered
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    For my R53 I use .28 - .30
     
  8. Crashton

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    I always check the gap on spark plugs before installing. More often than not 1 or more need to be adjusted. It's easy even this old fart can do it.
     
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  9. Namikuz

    Namikuz Member

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    Well, I've built and tuned some ridiculous cars, plug gap and heat range is a class room discussion on to it's own. In a nut shell, more boost/compression, the plug should be colder and the gap narrower, being , a hotter plug has more tendency to preignition as it becomes a glowing electrode and the gap, when under boost/high compression, needs to be narrower so the combustion can take place, it's harder to ignite super compressed air/fuel mix and keep flame propagation.
    Or, it blows out the candles....
    Most common on street tuned, 91-93 octane (USA) 1 range colder and gap from .026 to .030.
    Alternative fuels, a whole different class.....
     
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  10. InstrumentOfPeace

    InstrumentOfPeace Active Member
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    Check. Check. Noted Thank you for taking the time to make that high level explanation.


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  11. Namikuz

    Namikuz Member

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    No problem, hope it helped.
     
  12. InstrumentOfPeace

    InstrumentOfPeace Active Member
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    A very humble, Yes. While I’m sure I’d understand it sooner or later, but it made me feel like I would be trying to explain software polymorphism and inheritance. You’d get it, but best left for a classroom.


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  13. Dave.0

    Dave.0 Helix & RMW Powered
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    Yup, ^ and that is why I hand set mine at .028. Right in the middle. :D
     
  14. InstrumentOfPeace

    InstrumentOfPeace Active Member
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    I’ll take that as a standard const variable “safe” setting.


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  15. Dave.0

    Dave.0 Helix & RMW Powered
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    Yeah, I have a fully built RMW 1.62 forged motor and run 100 VP M-1Meth linked to the duty cycle of the injectors with a TVS-900 SC and when it gets tuned it will be more than 300 Whp. (At the wheels)

    Currently my OEM W11 motor with the OEM M45 SC is 268 whp with the same Meth kit and a ViPEC / Link stand alone ECU. JAN, owner of RMW is the man when it comes to tuning.
     
  16. BlwnAway

    BlwnAway Well-Known Member

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    #16 BlwnAway, Jan 19, 2020
    Last edited: Jan 19, 2020
    Hope you'll be done for MOTD, we'll need to give each other rides this year.
    Esp now that my brakes are done...Lol
    Got a little hairy at the end of the event last year.
    Really interested in riding in a TVS car.
     
  17. Dave.0

    Dave.0 Helix & RMW Powered
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    Being done by MOTD has always been the plan. It will get done.
     
  18. BlwnAway

    BlwnAway Well-Known Member

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    Excellent, should be a good year for high HP cars.

    Sorry, back to the thread.
     
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  19. Dave.0

    Dave.0 Helix & RMW Powered
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    We should have 2 new original GP coming also. One of them I spent a week detailing.
     
  20. Namikuz

    Namikuz Member

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    #20 Namikuz, Jan 24, 2020
    Last edited: Jan 24, 2020
    I've played on "The Tail" on my sport bike, I have a pic from Kill-Boy, very entertaining and at times technical.
    Would be a time and a half in a nice running Mini.....
     

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