12-04-2017, 04:37 PM | #1 |
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120i F20 B48 JB4 Map w/o DP any risk?
Hi guys,
I'm new here and reading through some posts I see there's a lot of info on the previous engine but not too much on the new one, at least on what I'm interested in now: can I run JB4 Map 2 without downpipe safely? I did run for a few days with Map 2 and compared with Map 1 and stock is like heaven and hell, it feels so much more powerful but I read before that in order to use (or at least take advantage of) Map 2 you must at least have an aftermarket downpipe installed which I do not have yet. I really like how my car feels on Map 2 but if there's any risk I won't do it until I get a DP. So, is there any risk running on Map 2 without a downpipe? Thanks guys, I hope you can help me and I can help you back in anything I can ![]() |
12-05-2017, 08:33 AM | #2 |
Colonel
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Stay on map1 - would be a shame to damage the cat due to impatience
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M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost
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12-06-2017, 10:58 AM | #3 | |
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Cat would be the only thing that may get damaged? What else can I modify on my beloved ![]() |
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06-19-2019, 04:17 AM | #4 |
SuperG
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Thanks mieluise for sharing the information on 120i jb4. I have a 120i as well and like to try JB4 or bms on it.
I don't think it's going to make any damage to your car because I don't see JB4 provides a list which what kind/which brand of intake or downpipe should be use for map2. or even the standard of air flow. Why they suggested I think it's may because of various gas condition around the world and better intake and downpipe will definitely help the ecu to increase the psi easier |
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120i, b48, downpipe, jb4, map2 |
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