1st Gen JCW S to JCW

Discussion in '1st Generation: 2002–06 R50, R53 & 2004–08 R52' started by Deech21, Jun 21, 2012.

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  1. Deech21

    Deech21 New Member

    Feb 16, 2012
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    When I was in having my O2 sensor replaced today, I asked my service advisor to look at something under the hood. It was a wire hidden behind the battery hookup under the bonnet, connected to a module that said John Cooper works on it.
    When i purchased the car, I was very excited because i knew it had a JCW intake and hoped maybe there were more goodies. So today the service advisor said it probably had the JCW kit on it looking at the module then parts were taken off before the sale.

    Here's my question. What would need to be done in order to bring it back to JCW status and what would the relative cost be?
     
  2. iwashmycar

    iwashmycar Active Member

    Jun 1, 2009
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    I thought the tune was just a computer flash?... If it is the box, then you'd just need an intake and exhaust I believe. Not much to it.
     
  3. Nathan

    Nathan Founder

    Mar 30, 2009
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    This is interesting...

    In 2005 you could get a dealer installed JCW kit or order it direct from the factory. It included a revised supercharger with what most think is an 11% pulley. The coated lobes were now standard in 2005 so that is no different. Also included is a slightly revised head, unique to the JCW. Frankly, for the cost of one of these from MINI you can a heck of lot better in the aftermarket. Other parts are the cat back exhaust and air box, colder plugs, 380 injectors and the software to tie it all together.

    First off you would want to determine what it any of the JCW bits you do have. Also want to see somehow of you have a JCW tune too. Might want to give MINI US a ring, 866-ASK-MINI and ask them what the car had on delivery for options.

    Converting it now from S to JCW specs I fear would be big bucks. MINI OEM parts are not inexpensive and the JCW bits are a bit more dear when it comes to pricing. You have to ask yourself if the cost is worth the return. You can easily achieve the same results with the afermarket for much less.

    The appeal in 2005 is that it was all covered under warranty if something went amiss. That was worth the extra cost to many people. Now these parts will not be covered, your warranty is long out of play here. If you really want a JCW I'd be looking for a one of that vintage built at the factory instead of trying to convert an S. To me the cost is just not worth it.
     
  4. iwashmycar

    iwashmycar Active Member

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    I think the question was just to get it to "JCW Kit" standards... not full factory?
     
  5. DixonL2

    DixonL2 New Member

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    ...although, best case, it was a JCW car (head, software, and intake) that the owner simply took the exhaust off of to make a few more buckaroos on the sale. Worth checking!

    Nathan, I checked around on the JCW pulley for Jason (our autocrossing buddy). Apparently, STX rules DO allow the JCW pulley, since the JCW came factory stock. The research I did was fairly conclusive at ~12%. Jason reported that he lost all of a pound of boost (gauge) at the top end, with no noticeable driveability changes (according to his calibrated butt dyno). I can attest to that, since he crushed me in the last autocross we were in!
     
  6. Crashton

    Crashton Club Coordinator

    Jun 4, 2009
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    You can make a bastard JCW for not much money.:wink: That is what I did on my MINI.

    The JCW will also have 380cc injectors.
    JCW airbox, which you have, although it sounds like the wiring for the flapper is not hooked up.
    12% pulley
    JCW head that has minimal head work
    JCW exhaust
    JCW flash to the ECU
    Various stick on JCW badges

    That is not a lot of stuff & you could go aftermarket & get more for less.
     
  7. bahawton

    bahawton Member

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    I have an unmarred JCW pulley that I removed @ 15K miles. I would sell it for $50 + shipping. E-mail [email protected] or PM me if interested.
     
  8. ScottinBend

    ScottinBend Space Cowboy
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    The OEM JCW pulley is a press on pulley, not like the aftermarket ones. It is very difficult (if not down right impossible) to install it on a SC still on a car.
     
  9. Deech21

    Deech21 New Member

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    Thanks for all of the input, I really appreciate it. Im going to give MINI a call and did out what options were added so I can get an idea of what I'll be working with.
     
  10. jasonsmf

    jasonsmf Active Member

    Jun 12, 2009
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    Very true, I guess if someone was super determined it could possibly be done on the car, but for something this critical you really want to have the SC off the car. If you build a "installation tool", throw the SC snout in the freezer for a few hours, and "bake" the pulley in the oven at 250F for an hour it's not too bad of a job. For the freezer and oven steps, it does help to be a single guy :biggrin5:

    Jason
     
  11. Dave.0

    Dave.0 Helix & RMW Powered
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    May 4, 2009
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    JCW is not really worth it unless you keep it all stock JCW.

    For me I turned my 05 JCW into a much more powerful and reliable RMW Mini.


    FUN:D
     
  12. DixonL2

    DixonL2 New Member

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    LMAO :lol:, only you, Jason, only you!
     
  13. Deech21

    Deech21 New Member

    Feb 16, 2012
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    what is this

    here's that module I mentioned. It appears to have a wiring harness attached to it but I have no idea what it is for.
     

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