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F30 / F31 / F32 / F33 (2012 - current)
The sixth generation 3 series, chassis code F30. 2013 model year 328i and 335i sedans now in production. Read the F30 frequently asked question thread for all your basic question and dive into all the details in the ultimate F30 information thread.

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  #1  
Old 02-15-2013, 06:27 PM
woodswatchco woodswatchco is offline
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Lag between shifts in a manual 328i M sport?

I'm getting a few miles (500) on my 328i so I decided to do some pretty hard 0-60 runs. I was a little shocked to feel a noticeable lag in acceleration between shifts in the lower gears. Especially between 1st and 2nd. It lagged so much that my head bobbed forward every time. I've always driven manuals so it's not a shifting skill issue. I was in sport mode at first and then I tried sport+ to see if that helped. It didn't. My last car was a 2003 Audi A4. It only had 170hp. Maybe this is normal to feel a power lull between shifts when you have a decent amount of horsepower? This is my fist BMW and honestly the fastest car I've owned. Could some of you guys that know cars and BMW's take the time to enlighten me? Thanks in advance.
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  #2  
Old 02-15-2013, 06:45 PM
Jamesonsviggen Jamesonsviggen is offline
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I was thinking you were experiencing traction control intervening and cutting power but that would not happen in sport+
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  #3  
Old 02-15-2013, 07:03 PM
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try shifting around 5500-6000
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  #4  
Old 02-15-2013, 07:37 PM
woodswatchco woodswatchco is offline
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I thought maybe it was the traction control too. Maybe when the car gets broken in more, it wil help. I'm dying to put the BMS tuner box on it but I feel like I should wait until the car has a couple thousand miles on it.




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Originally Posted by Jamesonsviggen View Post
I was thinking you were experiencing traction control intervening and cutting power but that would not happen in sport+
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  #5  
Old 02-15-2013, 07:58 PM
Jamesonsviggen Jamesonsviggen is offline
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Originally Posted by woodswatchco View Post
I thought maybe it was the traction control too. Maybe when the car gets broken in more, it wil help. I'm dying to put the BMS tuner box on it but I feel like I should wait until the car has a couple thousand miles on it.
Yeah, after 1200 miles-go for it!
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  #6  
Old 02-16-2013, 05:39 AM
otonimus otonimus is offline
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I still don't get what the issue is. I did some reasonably hard pulls even before 1200 miles (shifting at about 4500 max) and never noticed the lag he's referring to.

If it's really that noticeable, something might be wrong with the car.
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  #7  
Old 02-16-2013, 06:20 AM
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Originally Posted by justinnum1 View Post
try shifting around 5500-6000
Woodsy, It might be this. If you are used to shifting by "ear," bimmers tend to sound like they can rev to infinity. I remember on my old 6mt E60 bouncing the engine off of the rev limiter on a few occasions. If I'm not mistaken the N20's power band drops well before redline.
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  #8  
Old 02-16-2013, 08:51 AM
FredoinSF FredoinSF is offline
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Or it could be the clutch delay valve? I don't know of the F30's have that nasty device, but if yes it's easy DIY to bypass. Did it on my E46 and E63, much better clutch feel.
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Old 02-16-2013, 09:53 AM
Elk Elk is offline
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There is no separate CDV on the F30 as there is on earlier cars, but it may be built into the clutch slave.

The clutch on the F30 still has the mushy feel as the typical BMW clutch so I suspect there is a CDV buried in the line.
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  #10  
Old 02-19-2013, 09:58 AM
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Quote:
Originally Posted by Elk View Post
There is no separate CDV on the F30 as there is on earlier cars, but it may be built into the clutch slave.

The clutch on the F30 still has the mushy feel as the typical BMW clutch so I suspect there is a CDV buried in the line.
+1. It may be embedded somewhere in there as it sure feels like the CDV is still there.
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  #11  
Old 02-19-2013, 11:13 AM
Michael Schott Michael Schott is offline
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Originally Posted by 408Racer View Post
+1. It may be embedded somewhere in there as it sure feels like the CDV is still there.
I have an E90 328 with MT. CDV is stock. There is no lag between shifts. If people feel lag it's because they are trying to rush the shift. The gearbox cannot be rushed. BMW's have great clutches and the gearboxes are easy as pie to shift.
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Old 02-19-2013, 12:55 PM
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408Racer 408Racer is offline
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Quote:
Originally Posted by Michael Schott View Post
I have an E90 328 with MT. CDV is stock. There is no lag between shifts. If people feel lag it's because they are trying to rush the shift. The gearbox cannot be rushed. BMW's have great clutches and the gearboxes are easy as pie to shift.
Yes, it isn't lag as in turbo lag...it is a definite DELAY and takes getting used to if unaccustomed to CDV or CDV-like characteristics. I learned on a 540 6-speed so yes, I find BMW easy to shift...specially when compared to low/no-torque Japanese cars.
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  #13  
Old 02-19-2013, 10:24 PM
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Originally Posted by mdsbuc View Post
Woodsy, It might be this. If you are used to shifting by "ear," bimmers tend to sound like they can rev to infinity. I remember on my old 6mt E60 bouncing the engine off of the rev limiter on a few occasions. If I'm not mistaken the N20's power band drops well before redline.
Around 5k.
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  #14  
Old 02-20-2013, 04:42 AM
woodswatchco woodswatchco is offline
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Thanks for your advice guys. I really appreciate it. I think I was shifting by ear at too high of rpm for this car. Honestly, I've always driven Japanese manuals until two years ago when I got the 2003 Audi A4. Great car but not much power. That's why I left them for BMW !





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Originally Posted by -=Hot|Ice=- View Post
Around 5k.
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  #15  
Old 02-20-2013, 07:10 AM
Jamesonsviggen Jamesonsviggen is offline
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Quote:
Originally Posted by -=Hot|Ice=- View Post
Around 5k.
Not quite, I had about 20dyno pulls and power only tapered 8% or so from peak to 6800rpms.
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  #16  
Old 03-02-2013, 12:32 AM
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BmwFlooner BmwFlooner is offline
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Quote:
Honestly, I've always driven Japanese manuals until two years ago when I got the 2003 Audi A4.
I'm in the same boat. My Eclipse sounded like the engine was about to blow out of the hood by 4500 rpms, so the shift cue was 'shift when the engine starts sounding uncomfortably loud.'. Got my 328i MT in not long ago, and I'm still getting used to how subtly powerful it is. During normal driving the engine never breaks a sweat at all - audibly. Still breaking it in so I can't open it up, but I was amazed during a test drive how effortless it was to redline (first BMW experience). So I'm not sure what is common for BMW MT owners. Keeping rpms low during normal city driving, but pushing to 5000/6000+ when you need that burst of something special (like when merging onto the highway)? What is considered 'pushing it' vs normal rev ranges?
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  #17  
Old 03-02-2013, 07:50 AM
Jamesonsviggen Jamesonsviggen is offline
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Quote:
Originally Posted by BmwFlooner View Post
I'm in the same boat. My Eclipse sounded like the engine was about to blow out of the hood by 4500 rpms, so the shift cue was 'shift when the engine starts sounding uncomfortably loud.'. Got my 328i MT in not long ago, and I'm still getting used to how subtly powerful it is. During normal driving the engine never breaks a sweat at all - audibly. Still breaking it in so I can't open it up, but I was amazed during a test drive how effortless it was to redline (first BMW experience). So I'm not sure what is common for BMW MT owners. Keeping rpms low during normal city driving, but pushing to 5000/6000+ when you need that burst of something special (like when merging onto the highway)? What is considered 'pushing it' vs normal rev ranges?
I have no problem cracking 6k. According to my dyno, it makes only about 8% less power than it's peak at 6700, right before fuel cut.

On a stock car, 6-6500 is fine...it can take it, it's not abuse.
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F30: ForgeStar F14 19's summer-OZ Superleggera 17's winter/Rogue Catback/Integral Audio/AFE intake scoop/BMS stage 1
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