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  1. #1
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    I'm finally ready for a tune. JB4 or Cobb at 3700ft.

    I've had my car one year now - and it's time for a tune. I'm finally going to order something this weekend.

    I'm not very technical when it comes to cars, but have been following all the discussions on various forums since before I purchased my car, and have narrowed it down to two final options. I'm looking for some final influence .. final words of wisdom before I hit 'order'.

    JB4

    Proven, and I believe I have enough technical ability to be able to install, deinstall and configure the piggyback. I love the camaraderie between JB owners, and the availability of knowledge and support.

    The one negative that has slightly put me off is a recent comparison I read between Cobb and JB4 at altitude (I'm quite high up here in Calgary) .. the Cobb seemed to come out on top. That was just one person though.

    Cobb AP

    I love the ease of use with this unit .. Cobb is an established company, but the BMW Access Port is very new. There is the price difference too, but whether it's $500 or $900, both offer massive value for what you get. The future potential of the Cobb seems massive - and exciting.

    I'm not looking to break any records with my car, but crave for that 'little extra' Click here to enlarge

    The other option is to buy both, and return the one that is inferior. But that involves extra shipping, insurance .. and I really don't like returning things unless they really suck.

    I've already ruled out all other tunes for various reasons, so please don't even suggest them Click here to enlarge

    Cheers
    ~

  2. #2
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    i don't anything about them , but are you sure you want 'little extra' ? In a weather condition like Calgary's you will face something not good ,
    You know it better than me Click here to enlarge

  3. #3
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    i'm not familiar with cobb - but the JB4 is a really good bargain, considering what you're getting, not to mention if you get the USB cable....all the logging you can do.

    Cobb does look promising though, see if you can find someone locally with both tunes Click here to enlarge

  4. #4
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    Click here to enlarge Originally Posted by Sorena Click here to enlarge
    i don't anything about them , but are you sure you want 'little extra' ? In a weather condition like Calgary's you will face something not good ,
    You know it better than me Click here to enlarge
    Of course, it will only be utilized fully on dry road days. I have a feeling we might get a summer this year, and the roads have been dry since Tuesday Click here to enlarge
    ~

  5. #5
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    Talk to Lost Marine via pm about what he uses.
    Click here to enlargeClick here to enlarge

  6. #6
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    I can not give you an unbiased advice.

    But I can congratulate you on your decision.

    It took me 2 years to make that one, and I decided to tune after my warranty was gone.

    I promise you 're gonna have fun with either one.

    Consider a LSD as well if you like driving down winding roads.

    That I should have done right from the day I bought the car.
    There are two theories to arguing with women. Neither one works

  7. #7
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    Click here to enlarge Originally Posted by bigup Click here to enlarge
    I have a feeling we might get a summer this year
    lol , man i'm sitting with my boxers in the balcony and i'm whining about the warm weather !

  8. #8
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    try both. see what you like better.. you have 14 days or so to return either. but if you have to pick ONE .... Click here to enlarge

  9. #9
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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    try both. see what you like better.. you have 14 days or so to return either. but if you have to pick ONE .... Click here to enlarge
    The $400 price difference sure buys lots of beer.

    Decisions decisions.
    ~

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    does anyone represent cobb on here like Terry does for the JB4? Support sure is nice, but so is an unmolested ECU box and cowl. I have the JB4, and enjoy the ease of being able to swap programs on the fly and being able to read and clear codes without any additional hardware. It is cheaper too. If I had say, 30,000 miles left on my warranty, I might want the Cobb, since it would be so easy to go back to stock for service. I only have about 2,000 so it's balls out for me from here on out!

  11. #11
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    Click here to enlarge Originally Posted by bigup Click here to enlarge
    The $400 price difference sure buys lots of beer.

    Decisions decisions.
    For the money, nothing better than JB4.

  12. #12
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    Click here to enlarge Originally Posted by Ryan Mills Click here to enlarge
    does anyone represent cobb on here like Terry does for the JB4?
    No.

    Cobb is here technically but not offering support as a vendor.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    For the money, nothing better than JB4.
    Money yes but tuning at altitude?......... I don't think so! For the OP, the right answer is Cobb.
    A tune that can't affect any timing control will drop boost and target higher retard in timing after adaption at high altitude.
    Case in point :http://www.e90post.com/forums/showthread.php?t=510693
    Last edited by Sparky66; 04-08-2011 at 07:51 AM.

  14. #14
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    Click here to enlarge Originally Posted by Sparky66 Click here to enlarge
    Money yes but tuning at altitude?......... I don't think so! For the OP, the right answer is Cobb.
    A tune that can't affect any timing control will drop boost and target higher retard in timing after adaption at high altitude.
    Case in point :http://www.e90post.com/forums/showthread.php?t=510693
    That's exactly the thread that prompted my question here.

    I'm not quite as high up as Denver though, and I do know there are people that successfully run JB3/4 products in Calgary.

    Denver is ~5200ft, Calgary averages at about 3700ft.

    But what if I drive out into the mountains (which I frequently do in the summer) .. it's much higher out there.
    ~

  15. #15
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    Click here to enlarge Originally Posted by Sparky66 Click here to enlarge
    Money yes but tuning at altitude?......... I don't think so! For the OP, the right answer is Cobb.
    A tune that can't affect any timing control will drop boost and target higher retard in timing after adaption at high altitude.
    Case in point :http://www.e90post.com/forums/showthread.php?t=510693
    I don't see why the JB4 at altitude would be a problem? The DME will control the timing as necessary.

    Cobb will offer more precise timing control, true.

  16. #16
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    Click here to enlarge Originally Posted by Sparky66 Click here to enlarge
    Money yes but tuning at altitude?......... I don't think so! For the OP, the right answer is Cobb.
    A tune that can't affect any timing control will drop boost and target higher retard in timing after adaption at high altitude.
    Case in point :http://www.e90post.com/forums/showthread.php?t=510693
    The JB4 works great at elevation. The OP of that thread just dislikes our style of tuning and has his own agenda to put forth. It's a free country but his JB4 map 1 dyno results look great for 0 smoothing and don't show a hint of knock. Map 5 is known to be overly conservative at elevation.

    But if timing is a big concern, and it never has been for the 100s of other high elevation JB3/JB4 users, just get our CPS add on module. It's in alpha testing now and gives you full control over the CPS offset. We're building it in to the autotuning functions now as well for an install and forget it type thing.

    In general flash tunes are fine but do have their limits, especially in terms of features like our in dash gauges, shift light, autotuning, etc. They are also not very warranty friendly.

  17. #17
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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    The JB4 works great at elevation. The OP of that thread just dislikes our style of tuning and has his own agenda to put forth. It's a free country but his JB4 map 1 dyno results look great for 0 smoothing and don't show a hint of knock. Map 5 is known to be overly conservative at elevation.

    But if timing is a big concern, and it never has been for the 100s of other high elevation JB3/JB4 users, just get our CPS add on module. It's in alpha testing now and gives you full control over the CPS offset. We're building it in to the autotuning functions now as well for an install and forget it type thing.

    In general flash tunes are fine but do have their limits, especially in terms of features like our in dash gauges, shift light, autotuning, etc. They are also not very warranty friendly.
    Thanks for your input Terry. It's hard sometimes to take things at face value on E90Post; and that thread does seem to contradict the many happy JB3/4 users at altitude.

    I think I'm ready to give the JB4 a go -- and will do whatever it takes to log and configure it in such a way that it keeps me happy Click here to enlarge I'm in Canada, so N54tuning is the best place to order, correct?

    One final Q -- I have the BMS drop-in, should I use that, or get the DCI? Would the gains be significant, or would it simply be for the cool sound?
    ~

  18. #18
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    3700 ft is not that high... JB4 is on cars at even higher elevations.
    Some people live long, meaningful lives.

    Other people eat shit and die.

    I'm not racist, I hate everybody equally; especially fat people.


    Click here to enlarge

  19. #19
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    3700 ft is not that high... JB4 is on cars at even higher elevations.
    You speak the truth Click here to enlarge

    It's high enough for N/A cars to lose ~10-12% power though Click here to enlargeIt makes G37's, and IS350s easy targets for me .. even stock. LOL.
    ~

  20. #20
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    Click here to enlarge Originally Posted by bigup Click here to enlarge
    You speak the truth Click here to enlarge

    It's high enough for N/A cars to lose ~10-12% power though Click here to enlargeIt makes G37's, and IS350s easy targets for me .. even stock. LOL.
    NA cars will suffer even at 1 ft elevation, they dont have the advantage of pressure ratio machine that sets absolute boost pressure to whatever the hell you want.
    Some people live long, meaningful lives.

    Other people eat shit and die.

    I'm not racist, I hate everybody equally; especially fat people.


    Click here to enlarge

  21. #21
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    What up bigup. Im in the same situation as you, had the car for about a year now and I feel like I would like a tune to put a bigger grin on my face. JB4 looks like the obvious choice for me as well. Probably in the next couple weeks. Gl whatever you decide. Subscribed.
    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Keep on jealousing.

  22. #22
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    Also from a performance aspect, from what I understand the Cobb AP isn't going to keep up with the higher maps on the JBx. The forthcoming Cobb APR is slated for the bigger power/more bolt on's people. Something to consider if you're planning to keep the tune and car for a while.
    Click here to enlarge

  23. #23
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    1 out of 1 members liked this post. Reputation: Yes | No
    JB4 + USB cabled ordered!

    This is going to be fun Click here to enlarge
    ~

  24. #24
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    Click here to enlarge Originally Posted by bigup Click here to enlarge
    JB4 + USB cabled ordered!

    This is going to be fun Click here to enlarge
    Let us know how you like it.

    I also expect a big fat check from Terry so I can finally buy that island I've had my eye on.

  25. #25
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Let us know how you like it.

    I also expect a big fat check from Terry so I can finally buy that island I've had my eye on.
    What price are islands going for these days? I'm sure there are enough members on Bmmerboost now to chip in and buy "Bimmerboost Island" Click here to enlarge
    ~

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