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AmarN54 AmarN54 is offline
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Car: 11' Z4, 11' M3
Default Stock F10 M5.. JB Stage 1 or JB4 + BCM? - 09-28-2015, 11:26 PM

Hey guys! I have a stock F10 M5..

Not going to do much more than a new exhaust (only mufflers... MAYBE DP's down the road)

I read through all 11 pages of the BCM/S63TU tuning thread and no one answered/asked the question...

Can I run JB4 + BCM and run map2 to get the 22psi target or would I run Stage 1 and add 5psi using the datalogging cable?

And to add on, I know the clutches slip in between shifts with 22 psi and higher... is it worth the extra $650 to get the JB4 + BCM if I have to then deal with a slipping DCT during gear changes.

I understand it has all the data-logging capabilities and whatnot.. but I'm more interested in power. I know that stage 1 runs 18psi if I'm not mistaken?

Thanks guys!


Z4 35is - JB4 and that's it.
Stock time: 12.768 at 108mph.
Tuned time: 11.935 at 116mph.

Last edited by AmarN54; 09-29-2015 at 12:07 AM..
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Join Date: Jan 2008
Default 09-29-2015, 10:24 AM

The BCM is not an easy install. But if you're able to do installs yourself in your home garage then definitely go for the JB4+BCM route. If you have to pay a mechanic I'd just stay Stage1.

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SkyDan SkyDan is offline
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Car: 2014 M6 Vert
Default 10-20-2015, 08:30 AM

I have stage 1 installed and I am interested in stage 2 + BCM. Do you have install partners near 10309? 2014 M6. Thanks.
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SkyDan SkyDan is offline
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Car: 2014 M6 Vert
Default :bump: - 10-22-2015, 08:38 AM

Nothing for me? Legitimate customer here.
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lfelunden lfelunden is offline
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Car: 335i e92
Default 10-23-2015, 02:42 AM

It all depends on your fuel tbh. I ran the Map 2 on my car with dp and full exhaust - moved nicely. But if you want something that adds power, the stage 1 is a good way to go
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