11-27-2020, 09:33 PM | #1 |
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BMW 340i xdrive JB4 Map 3 question
Hey,
I have a 2017 BMW 340i xdrive with the BMS intake and JB4. I run 93 octane gas as well. Am I able to run Map 3 with the JB4? Heard I may need downpipes and would love to confirm. Thanks |
11-30-2020, 08:03 AM | #3 |
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When I first installed the JB4 on mine, map 2 was smoother, but felt down a bit on power compared to the JB+ I had on it. Map 3 felt powerful, but a bit jerky and laggy and times. After a couple months it felt like the car adjusted and map 2 felt like stock, so I tried map 3 again. Now it felt much better, no more weird shifts or jerkiness. It didn’t feel as smooth as stock, but was pretty good. For the last month or so I decided to try adding a little E85 just to get the octane up for safety, about an E20 blend. I think the car feels even smoother now. Feels like stock but with way more power.
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