11-02-2023, 06:56 PM | #1 |
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JB4 Map 2 hesitation
Hey guys so I had the JB4 installed the other day. I’m running Map 2. My mods are as follows: MST intakes, Evolution Racewerks 200cell high flow catted down pipes, Active Autowerks single non resonated mid pipe and Valvetronic axle back exhaust. I’m running 94 octane. I love the power increase compared to stock but on full throttle it seems like the car hesitates initially a split second then it takes off. Anybody else experience this feeling?
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11-02-2023, 07:41 PM | #2 |
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Drives: E46 M3 Coupe/G80 M3CX
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Doesn't the car do that stock too?
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11-02-2023, 08:45 PM | #4 | |
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11-02-2023, 11:59 PM | #6 |
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11-03-2023, 07:42 AM | #7 | |
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From a stop without LC or brake boost they neutered the boost in 1st. brake boost it and its a totally different animal. If you're running a JB4, do some data logs and post. Much better using actual data than just internet guessing.
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11-03-2023, 08:22 AM | #8 | |
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11-03-2023, 10:28 AM | #9 |
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Let us know what they say
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11-03-2023, 10:49 AM | #11 | |
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I ran a JB4 on my M4 before I unlocked and am now running it on my X3M. I wouldn't run map 3 at all. I ran maps 2 and 4 on M4, and keep it on map 1 with X3M. Power delivery is inconsistent and non linear, and that annoys me. JB4 is a nifty little device, but I don't feel safe trying to make large power increases on it. All it does it trick the ECU into adding boost and hopes it adds additional fuel to compensate. If you're trying to make big power gains Id recommend unlock and tune. Its safer, more reliable, consistent, and easier to make gains.
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11-03-2023, 11:04 AM | #12 | |
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11-03-2023, 11:26 AM | #13 | |
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Maps 1-3 are additive while map 4 and 5 are absolute. 1-3 just add boost to the ecu target, whereas 4 and 5 change the target. Map 6 is a custom map that you can make changes to. Logging and sending to BMS is the right answer though. They'll get you sorted.
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11-03-2023, 11:43 AM | #14 | |
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11-04-2023, 12:46 AM | #15 | |
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Couple things, make sure your firmware is up to date number 1, secondly make sure you have done the proper adaptations before thinking you have an issue. PM me if you need help I run private JB4 FB group ne we have a lot of guys who are running very fast and very happy 👍 https://youtu.be/tCSRRvBo9gs?si=vXNMrX_vGx0MgdXs https://m.facebook.com/groups/270707...ibextid=S66gvF |
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11-04-2023, 06:48 PM | #17 |
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Would love to but this is my daily so I can’t be down a couple days if not more to send ECU out to get unlocked then the tune. Not looking for crazy gains also. Just need that extra pep. Not racing or tracking the car.
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11-04-2023, 08:28 PM | #18 |
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11-06-2023, 07:40 AM | #21 |
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JB4 never ran smoothly for me on any car. Even after revisions/ recommendations from Burger. Ended up selling it and getting ECU unlocked because I couldn't stand the inconsistency.
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