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      01-31-2019, 02:30 PM   #5
Brett530
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Drives: '17 F30 340i
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There are quite a few things that limit acceleration that might feel like transmission slip. The most likely thing is fuel limits. The JB4 can only deal with a few of these to try to trick the engine into giving more power. The real answer is to take a few logs with the JB4 and go over to N54tech and post them there. They can tell you what is happening.
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