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I recently purchased a bmw 230i with manual transmission and the rev hang is terrible :mad: it almost makes my driving experience not enjoyable. If i try to quickly change gears (especially from 1 to 2) i get a horrible lurch. It is possible to make a smooth shift but i need to let off the clutch very slowly and this is terribly annoying and forces me to accelerate very slowly, not to mention clutch wear.

I have done a ton of research on this topic but no one seems to have a solution. Can someone please HELP ME :cry: I know for a fact that a dinan tune wont reduce rev hang. Does anyone know of any other tunes that will eliminate this rev hang? Does the 230i have a CDV? If so, will deleting it solve my problem?

Any other suggestions that can make my driving experience more enjoyable will greatly be appreciated.
 

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I'm guessing the issue is that your revs aren't dropping fast enough between 1->2. Things you can do to help:
1. Let off the gas earlier before shifting. What car did you drive before the 230i? I've found that there's about a half second lag on these DBW cars compared to cable throttled cars.

2. Shift earlier. I tend to go 1->2 right around 10mph, so that the absolute RPM difference is minimal. It's probably something like 1200rpm in 1st -> 650rpm (idle) in 2nd, minimizing lurches.

3. Estimate rev drop needed, clutch in for longer. If you shift at high RPM, you're just going to have to wait longer for the revs to drop. If you are shifting quickly at 6K and trying to make it smooth, you will probably have to wait an extra second for the revs to drop close to 3300rpm in 2nd before releasing the clutch. The 6 speed ratio between 1st and 2nd is 3.68/2.06 or about 1.8:1. https://www.bmwusa.com/vehicles/2-series/coupe/230i-coupe/specifications.html

4. Get a non-Dinan tune and change the throttle response (no experience here)

5. Get a lighter flywheel so revs drop faster

6. Get to know the friction point better so you smooth out the release only along the friction point and not dead zone

The 230i has the rev match feature, right? I've found that this actually helps smoothness because on upshifts, even if you wait too long, revs don't drop below target. Unfortunately, it can only blip the throttle, not make revs drop faster.

According to my reading of other threads, 230i's have both the rev match feature and a clutch delay valve.
 

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That attribute was also discussed in Engineering Explained's YouTube Video here: https://www.youtube.com/watch?v=Z0BfaGT0ayA

Thanks for your post...I'm thinking of a 230i...have had multiple manual transmission vehicles and have enjoyed the experience, but this issue has me thinking of the ZF 8AT. The one we had in our former F31 was excellent and paddle shifting gives you that sense of "transmission control".
 

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I have 5 speed manual ‘08 Mustang GT; love it; but also the ZF 8 speed automatic transmission is excellent in my 230i. And I use the manual gear shift & paddle shifters a lot; but the ZF transm. upshifts & downshifts very-very well on its own if you let it. Nice option depending on ur driving mood
 
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