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      02-23-2012, 01:28 PM   #1
bmw-nj
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New F30 Owners with Manual Transmissions

Does the new F30 equipped with a manual transmission have a notchy 1-2 shift?

I'm wondering if they fixed the problem from the last generation.

Thanks.
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      02-23-2012, 01:36 PM   #2
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It is much smoother than my 135. Third gear is the most notchy.
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      02-23-2012, 02:46 PM   #3
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Just be aware the 335i and 328i have different manual transmissions, so what might be the case on a 335 may be different on a 328.
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      02-23-2012, 02:52 PM   #4
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Thanks.
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      02-23-2012, 03:02 PM   #5
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Originally Posted by unintelligible View Post
Just be aware the 335i and 328i have different manual transmissions, so what might be the case on a 335 may be different on a 328.
Interesting, no wonder the 328i is so quick, it has a 3.91, while the 335i has a 3.23. Of course the E92 335i is listed as a 3.08, so this doesn't explain why the F30 335i is a little slower than the E90. I'm too lazy to look at 1st and 2nd alone, but that could explain it.
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      02-23-2012, 03:49 PM   #6
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Quote:
Originally Posted by Red Bread View Post
Interesting, no wonder the 328i is so quick, it has a 3.91, while the 335i has a 3.23. Of course the E92 335i is listed as a 3.08, so this doesn't explain why the F30 335i is a little slower than the E90. I'm too lazy to look at 1st and 2nd alone, but that could explain it.
You are talking about the final drive (differential) ratio, not the gearbox
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      02-23-2012, 04:09 PM   #7
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Originally Posted by E90Fleet View Post
You are talking about the final drive (differential) ratio, not the gearbox
Correct, but a higher final drive should make for a quicker car, with a lower top speed.
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      02-23-2012, 04:17 PM   #8
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Quote:
Originally Posted by Red Bread View Post
Correct, but a higher final drive should make for a quicker car, with a lower top speed.

Just remember the 328i and 335i manual gearboxes are different with different gear ratio's aswell. So you cant just look at the differential ratios.
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      02-23-2012, 04:20 PM   #9
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Originally Posted by E90Fleet View Post
Just remember the 328i and 335i manual gearboxes are different with different gear ratio's aswell. So you cant just look at the differential ratios.
See, when I woke up this morning, I just assumed they had the same gear ratios, rear rend and transmission. Now I know differently. Thanks!
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      02-23-2012, 05:10 PM   #10
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Our manual F30 335i sport feels plenty smooth to me with just enough feedback. My E92 M3 was a bit notchier in comparison
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      05-13-2012, 09:33 AM   #11
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Hi folks, it looks like BMW has tuned the new f30, 328i engines with significantly less engine drag during engine braking. I was wondering if the manual transmission continues to be as much fun without the engine drag during engine braking. Thx
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      05-13-2012, 10:31 AM   #12
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One of the reasons for the notchy 1:2 shift is the CDV (Clutch Delay Valve). It makes it easier for 16-year old girls to drive a manual transmission without stalling, but it makes it notchy for everyone else. On the E9X, you can remove this CDV with a part from Bavarian Auto Sport. Does the F30 have the same CDV?
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      05-13-2012, 01:23 PM   #13
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Quote:
Originally Posted by shoptb View Post
One of the reasons for the notchy 1:2 shift is the CDV (Clutch Delay Valve). It makes it easier for 16-year old girls to drive a manual transmission without stalling, but it makes it notchy for everyone else. On the E9X, you can remove this CDV with a part from Bavarian Auto Sport. Does the F30 have the same CDV?
What exactly is the CDV doing? I've ordered a 6MT 328i as well, so just curious. I've only owned one MT car (my current Mazda 3), so not familiar w/ some of these things.
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      05-13-2012, 01:24 PM   #14
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If I was set on getting a 6MT, would this help steer me toward either the 328 or the 335. In other words, is one or the other better to shift?
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      05-13-2012, 01:41 PM   #15
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Originally Posted by PrazVT View Post
What exactly is the CDV doing?
A CDV is a valve in the clutch hydraulic which restricts the flow of hydraulic fluid. In so doing, it limits how fast the clutch allows the driveline to engage.

It can make it easier for the inexperienced manual operator (a CDV helps avoid stalls and abrupt upshifts), but is incredible annoying and frustrating for someone who can properly handle a manual transmission.
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      05-13-2012, 03:25 PM   #16
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Quote:
Originally Posted by Ganeshbabu2008 View Post
Hi folks, it looks like BMW has tuned the new f30, 328i engines with significantly less engine drag during engine braking. I was wondering if the manual transmission continues to be as much fun without the engine drag during engine braking. Thx
I don't think the engine braking makes much difference for fun. It is just kind of annoying to need to use the brakes when cruising down hill.
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      05-14-2012, 03:24 AM   #17
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The CDV is big downer, makes you wonder what is really the point of the MT...
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      05-14-2012, 06:23 AM   #18
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Quote:
Originally Posted by bmw-nj View Post
Does the new F30 equipped with a manual transmission have a notchy 1-2 shift?

I'm wondering if they fixed the problem from the last generation.

Thanks.
When accellerating fast from a standstill: 6000rpm in first going fast to second it's not exactly smooth, you have to feel what you are doing, which can take longer than you want...
As I recall the ex E90 M3 and ex E90 335i, both MT were a tad smoother from 1-2.


This morning I did 4 of those sprints and the last one was the smoothest.

In normal driving there is nothing notchy about the 1-2 shift though.

So how can I get rid of the CDV

No F30 yet:
http://www.zeckhausen.com/cdv.htm

EDIT: If the CDV is removed or modified I 'm sure MY 0-100kmh times can be reduced with at least 0.5 seconds....

Last edited by Robin_NL; 05-14-2012 at 06:31 AM.
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      05-14-2012, 07:51 AM   #19
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Looking at the parts diagram for the clutch I do not see a separate CDV like on past models. It could be that the CDV is inside the clutch slave cylinder. Until somebody goes rooting around all we can do is guess...

On my Evo the CDV was inside where the clutch line attached to the slave cylinder. I needed to remove the line and pull it out using a very thin screwdriver. Taking it out really helped that car and I imagine it will help the 328 also.
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      05-14-2012, 08:24 AM   #20
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Quote:
Originally Posted by shoptb View Post
One of the reasons for the notchy 1:2 shift is the CDV (Clutch Delay Valve). It makes it easier for 16-year old girls to drive a manual transmission without stalling, but it makes it notchy for everyone else. On the E9X, you can remove this CDV with a part from Bavarian Auto Sport. Does the F30 have the same CDV?
Total nonsense. CDV has nothing to do with 1-2 being notchy. CDV is slowing a clutch release a little.
And you will stall all right with or without CDV. It is installed to protect clutch mechanizm.
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      05-14-2012, 08:50 AM   #21
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wow, that really sucks if you cant remove the CDV
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      05-14-2012, 08:54 AM   #22
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Quote:
Originally Posted by 55 View Post
Total nonsense. CDV has nothing to do with 1-2 being notchy. CDV is slowing a clutch release a little.
And you will stall all right with or without CDV. It is installed to protect clutch mechanizm.
"Nonsense"? Clearly you haven't driven a BMW without a CDV.

Benefits of replacing your CDV with a modified unit

After the stock CDV is replaced with one of our modified units, you will be able to shift gears in your BMW like a "normal" car. No more vague, inconsistent clutch engagement. No more jerky 1-2 shifts. You can actually chirp the tires when shifting from 1st to 2nd gear! Parallel parking becomes a breeze and your clutch will love you for it and last much longer. Best of all, your passengers will stop making fun of your driving skills.
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