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ninefourteener ninefourteener is offline
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Default Just bought a 2020 X5 M50i - 10-08-2019, 01:23 PM

I've used JB4s on my last 2 BMWs; a 2014 328i, and a 2016 340i..... both with great success.

Admitedly, a bit frustrated with all the CELs that popped up about 45-50% of the starts.... and I'm an American living in Belgium with a US spec car. I thought outside the US, the JB4 would "auto-clear" like it used to before they did that mandatory update over a year ago.

Doesn't matter. I just ordered a 2020 X5 M50i. It is scheduled to arrive in January 2020.

My question is..... Is a JB4 even worthwhile? The M50i is essentially just a factory tuned version of the X5 50i.... and the numbers from the JB4 tuned X5 50i aren't "that" far off from the stock numbers of an X5 M50i.

Is it really even worth it to spend $700 on "maybe" 15-20hp?

Or.... are the numbers going to be considerably higher than stock???


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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 10-08-2019, 03:46 PM

Passive delete is an option you can select in the app. Did you select it? On the B58 BMW also changed the way code delete works so we have an update for that posted.

On the M50i I think it's worth it.. Of course, I'm biased. Why not do a Stage1 if you just want an easy 30-40hp?


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ninefourteener ninefourteener is offline
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Default 10-09-2019, 03:01 AM

Thats probably what happened, is that I didn't get the update. No big deal or anything, I was just something I lived with. I'm sure if I buy another JB4 the software will be up to date.

So do we have any dyno figures specifically for the M50i? You are saying 30-40hp???


2016 340i MPPSK, alpine white/coral red
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Default 10-09-2019, 10:42 AM

We don't have any M50i specific dynos for the X5 yet but that is what the gains look like based on the testing we've done. You can always try the Stage1 and return it if you're not happy but I think the gains will be noticeable.


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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ninefourteener ninefourteener is offline
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Default 10-09-2019, 10:38 PM

Understand. It's the same engine as the M850i, so presumably the numbers will be the same. Car doesn't arrive till January, so I'm going to keep an eye out for someone else to use it first, and see what the results are.


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Default 10-10-2019, 09:10 AM



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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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ninefourteener ninefourteener is offline
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Default 10-11-2019, 12:43 PM

Terry..... gotta be honest. I just read through every post on this forum..... and every single one of them are people having problems using a JB4 on this platform.... and even unstances of you saying that tuning this platform is complicated.

That concerns me.... a lot.

I never had any problems with my JB4s on my last 2 BMWs..... this has me deeply concerned though.

There's no "success" stories anywhere.

Particularly for only "maybe" 30-40 hp.


2016 340i MPPSK, alpine white/coral red
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Default 10-11-2019, 01:40 PM

Quote:
Originally Posted by ninefourteener
Terry..... gotta be honest. I just read through every post on this forum..... and every single one of them are people having problems using a JB4 on this platform.... and even unstances of you saying that tuning this platform is complicated.

That concerns me.... a lot.

I never had any problems with my JB4s on my last 2 BMWs..... this has me deeply concerned though.

There's no "success" stories anywhere.

Particularly for only "maybe" 30-40 hp.
Haven't seen any issues with the G series.


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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