02-07-2020, 11:57 PM | #1 |
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M4 weak downshift sound
So here is the background: Originally the car was running bm3 stage 1 with stock exhaust. Sound was great comparing to stock.
Yesterday I just put on catless downpipe, and flashed bm3 stage 2 agg. The idle and reving sound is way louder. But here is the problem, now when I downshift, the loud reving sound is gone. It now sounds like a balloon losing air Anyone knows the reason for that? I really miss the loud rev match |
02-08-2020, 10:25 AM | #2 | |
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02-08-2020, 02:33 PM | #5 |
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02-08-2020, 02:35 PM | #6 |
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02-09-2020, 04:51 PM | #7 |
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Update: loud downshift comes back when I flashed back to stage 1 (91 octane ver. 9.0).
After trying different valve settings (open/close/auto), there was no change on downshift. Then I’ve tried to flashed to latest stage 1 (ver. 9.1) map. Strangely, it sounds even more louder than stage 2 agg. But still no change on downshift. Then I flashed back to previous stage 1 map, downshift sound was back. Not sure that’s exactly going on. But it works |
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02-10-2020, 06:48 AM | #8 | |
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in sport-mode is the function availible |
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02-10-2020, 03:16 PM | #9 |
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interesting. I never realize that before as I hardly drive in sport. It’s either comfort or sport+. The loud downshift was back after I flashed back to my original stage 1 map
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10-21-2021, 08:49 PM | #11 |
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I think he meant *at least* 2 of 3. I really wish there was a way to get 3/3 downshifts with 2/3 upshifts… that would be perfect. I like the way mclaren sets theirs - 2/3 is all theater and brutality and 3/3 is lightning shifts with less theater
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