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JB4 Worthiness

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Old 06-02-2019, 06:13 PM
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2017 Mercedes AMG C43 Coupe
JB4 Worthiness

For the people out there with a JB4 installed, is the JB4 worth it? I’ve been on a ride on map 1 and the difference wasn’t too obvious. Obviously you can run more than just 91 octane but strictly map 1, is there a night and day difference? My impression was a slight power bump, but nothing to knock your socks off. Maybe I’m wrong.
Old 06-02-2019, 08:19 PM
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Old 06-02-2019, 11:09 PM
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I have had Jb1 vrtuned box and now jb4


Jb4 on map 2 is a animal imo.... Sooooo much faster
Old 06-03-2019, 08:55 AM
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You're asking a painfully subjective question that's going to draw a million different perspectives. For the lions share here, map1 may as well not exist. Map2 or a location specific map6 is the norm.

For the $750 all-in price, it's worth it for the logging alone. The freedom to spend a few hours tweaking a map6 specific to your conditions, makes it an incredible value.
Old 06-03-2019, 09:50 AM
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Theres still no real dynos with before/after for the Facelifted C43.
Old 06-05-2019, 11:50 AM
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Originally Posted by Malar
Theres still no real dynos with before/after for the Facelifted C43.
We'll get some dyno numbers soon. It's not easy to trek down to Weistec, it's a good 6-8 hour trip back and forth for me.

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