Wavetrac or Quaife?

marcel b · 01-12-2010, 05:22 PM

Quote:

Originally Posted by scheherazade

*Quaife* has a very large line-up.
They have a front diff for the Xi, I can't imagine not having a rear for a DCT.

Wavetrac has less variety, so you may be stuck here... You may just need to get a standard 335 pumpkin and use that.

-scheherazade

quaife offers a lsd for the dct, wavetrac doesn't. changing pumpkin would mean a big change in final drive which I do not want.

scheherazade · 01-12-2010, 07:21 PM

Quote:

Originally Posted by marcel b

quaife offers a lsd for the dct, wavetrac doesn't. changing pumpkin would mean a big change in final drive which I do not want.

With your DCT, left in auto mode, you'd be exceptionally well positioned to take advantage of 6MT's relatively* short final drive gearing. (*relative to DCT's 2.56:1. Typically you'd be over 4:1 to be called short geared.)

Your transmission would bang out the shifts so fast. You'd be a hole-shot monster

-scheherazade

marcel b · 01-13-2010, 03:11 AM

Quote:

Originally Posted by scheherazade

With your DCT, left in auto mode, you'd be exceptionally well positioned to take advantage of 6MT's relatively* short final drive gearing. (*relative to DCT's 2.56:1. Typically you'd be over 4:1 to be called short geared.)

Your transmission would bang out the shifts so fast. You'd be a hole-shot monster

-scheherazade

I have checked the impact of the gearing and IMO with a 3.08 the gearing becomes too short.

2.56 2.81 3.08

1st 46.1 41.9 38.3
2nd 72.0 65.6 59.8
3th 102.5 93.4 85.2
4th 131.1 119.5 109.0
5th 158.6 144.5 131.8
6th 183.6 167.3 152.6
7th 220.3 200.7 183.1

scheherazade · 01-13-2010, 11:00 AM

Quote:

Originally Posted by marcel b

I have checked the impact of the gearing and IMO with a 3.08 the gearing becomes too short.

2.56 2.81 3.08

1st 46.1 41.9 38.3
2nd 72.0 65.6 59.8
3th 102.5 93.4 85.2
4th 131.1 119.5 109.0
5th 158.6 144.5 131.8
6th 183.6 167.3 152.6
7th 220.3 200.7 183.1

I presume that's mph.

60 at the top of 2nd looks perfect.

-scheherazade

marcel b · 01-13-2010, 11:30 AM

yup, these are mph. 2nd is ok, sure, but 4th and higher are getting too short IMO. With a M this would be nice, as the power band is much smaller, with a 335i with all the torque I do not see the point. (as my car is mainly daily driving, not tracking) Driving on the German highway hitting almost the speed limiter in 7th gear...

scheherazade · 01-13-2010, 12:59 PM

Quote:

Originally Posted by marcel b

yup, these are mph. 2nd is ok, sure, but 4th and higher are getting too short IMO. With a M this would be nice, as the power band is much smaller, with a 335i with all the torque I do not see the point. (as my car is mainly daily driving, not tracking) Driving on the German highway hitting almost the speed limiter in 7th gear...

155 is vs 183, looks like you can still hit the limiter just fine

Should be around 6000 rpm - lots of power a that rpm.

-scheherazade

marcel b · 01-14-2010, 05:19 AM

Quote:

Originally Posted by meyergru

Hi Eugen,

did you read this?

Matter-of-fact, I found it virtually impossible to get BMW to mod the diff. They can/will not open the diff, the neither have the knowlegde nor the tools for that. If you ever wondered why the BMW shops are so clean, this is the reason: They simply don't open things that could contain oil.

I had to go through a ZF shop in Munich to do the mod. On the other hand, they could not get the diff out, lacking the BMW tools. Thus, work had to be split and it was quite a costly operation (1200€ for the parts, 400€ for diff replacement and 400€ for the diff mod).

After all, I'd recommend to get a full diff replacement from Birds including the cover. Granted, it costs more, but any BMW shop can do the exchange, plus you can sell the spare part, which is impossible when you do it the other way.

I got a feedback from my dealer today that they can install the Quaife, no problem. They would open the differential, and provide me the welded gearring which I would sent to Birds. After receiving it back, they would mount it again. It would be no problem to leave the car in the shop for 2 weeks. Would cost about 400-450 Euro. Sounds good.

marcel b · 01-16-2010, 02:48 AM

Quote:

Originally Posted by scheherazade

155 is vs 183, looks like you can still hit the limiter just fine

Should be around 6000 rpm - lots of power a that rpm.

-scheherazade

scheherazade, what would your suggestion for a Drexler setup? 40/20 lock?

marcel b · 01-25-2010, 02:39 PM

update. After evaluation of the Quaife and the Drexler LSD I decided to go for the Drexler LSD. Order is placed today. Quaife was more expensive here in Switzerland the one from Drexler, which is crazy, especially when you compare this to the prices from Birds. I also checked to order directly at Birds at arrange the install, but this got really complicated. My dealer give me a quote to do the built in / out, but after asking them again this quote of 400-450 euro was only to built in / out the pumpkin. The could not build in the diff. At that point I gave up.
I have a good shop next to the ring who will arrange the Drexler install. They will straight away install the M3 rubber mounts for the rear axle (good to combine this in one go) and the M3 strut brace. I am now discussing with them what king of set-up of I want, as Drexler customizes the LSD to your need. If anybody has suggestions...?

Cannot wait till April

Renus · 02-22-2010, 04:42 PM

Hey Marcel, can u pls tell what is the best combination for DCT? Quaife + gearset 3.08?

marcel b · 02-22-2010, 04:50 PM

Quote:

Originally Posted by Renus

Hey Marcel, can u pls tell what is the best combination for DCT? Quaife + gearset 3.08?

For me the gears would be too short with a 3.08 gearset, especially as I use it as a daily driver. With the 7 gears, the gears are already shorter then with a 6AT or manual. See the impact on the speed (mph) in an earlier post in this thread.

scheherazade · 02-22-2010, 04:55 PM

Quote:

Originally Posted by marcel b

scheherazade, what would your suggestion for a Drexler setup? 40/20 lock?

I haven't used it so I can't say.

I'm sure it'll be a blast with default settings.

-scheherazade

tomtom · 02-22-2010, 06:39 PM

Quote:

Originally Posted by marcel b

They will straight away install the M3 rubber mounts for the rear axle (good to combine this in one go) and the M3 strut brace.

please explain which mounts and what difference they have?

marcel b · 02-23-2010, 03:42 AM

Quote:

Originally Posted by tomtom

please explain which mounts and what difference they have?

there are several threads about this. The 4 rubber mounts of the rear axle carier of the 335i are quite soft. The ones of the M3 are much firmer resulting in a more settled rearend.

See part number 2 and 3 in the link below.
http://bmwfans.info/parts/catalog/E9..._axle_carrier/

Renus · 02-25-2010, 04:37 AM

Quote:

Originally Posted by marcel b

For me the gears would be too short with a 3.08 gearset, especially as I use it as a daily driver. With the 7 gears, the gears are already shorter then with a 6AT or manual. See the impact on the speed (mph) in an earlier post in this thread.

So, 3.46 would be the best combination with Quaife? Is that true that only Quaife LSD is available for DCT drive?

marcel b · 02-25-2010, 04:46 AM

Quote:

Originally Posted by Renus

So, 3.46 would be the best combination with Quaife? Is that true that only Quaife LSD is available for DCT drive?

see post 71. I would not take a 3.46 having a DCT. The gearing will be far too short. I stay with 2.56 (standard).

Quaife offers something for the DCT, Wavetrac not (yet). Drexler offers also a LSD for the 335i DCT.

Renus · 02-25-2010, 04:51 AM

Quote:

Originally Posted by marcel b

see post 71. I would not take a 3.46 having a DCT. The gearing will be far too short. I stay with 2.56 (standard).

Quaife offers something for the DCT, Wavetrac not (yet). Drexler offers also a LSD for the 335i DCT.

Cool and thanks for your reply. So, you mean 2.56 is the stock's gearset, right?

Dexler seem quite expensive than Drexler, and according to Mr.5's Wavetrac istallation thread, I believe my garage can clearly know how to remove and install the LSD here in Hong Kong.

marcel b · 02-25-2010, 04:56 AM

Quote:

Originally Posted by Renus

Cool and thanks for your reply. So, you mean 2.56 is the stock's gearset, right?

Dexler seem quite expensive than Drexler, and according to Mr.5's Wavetrac istallation thread, I believe my garage can clearly know how to remove and install the LSD here in Hong Kong.

2.56 is indeed stock. Be carefull, you need a shop who can dismount the welded ring gear and attach it to the quaife (or wavetrac). You need some special tools for that.

good luck!

e.n335 · 02-25-2010, 05:05 AM

Quote:

Originally Posted by marcel b

2.56 is indeed stock. Be carefull, you need a shop who can dismount the welded ring gear and attach it to the quaife (or wavetrac). You need some special tools for that.

good luck!

Disagree somehow

. Just request a 2.56 ring gear from diffsonline. Should be around $600. IMO the most cheap method for welded diffs.

Eugen

Renus · 02-25-2010, 06:01 AM

Quote:

Originally Posted by e.n335

Disagree somehow

. Just request a 2.56 ring gear from diffsonline. Should be around $600. IMO the most cheap method for welded diffs.

Eugen

Do you mean the welded ring gear doesn't need be removed from drive?

e.n335 · 02-25-2010, 06:37 AM

Quote:

Originally Posted by Renus

Do you mean the welded ring gear doesn't need be removed from drive?

exactly. this has been already discussed here. no need to remove or machine something in case you buy a new ring-gear and the quaife.

marcel b · 02-25-2010, 06:48 AM

Quote:

Originally Posted by e.n335

Disagree somehow

. Just request a 2.56 ring gear from diffsonline. Should be around $600. IMO the most cheap method for welded diffs.

Eugen

you are right, this is an option as well

I was however quoted quite a bit more...

01-13-2010, 11:30 AM	#71
marcel b Lieutenant Colonel 137 Rep 1,898 Posts Drives: F31 340i Join Date: Jun 2009 Location: Europe iTrader: (0)	yup, these are mph. 2nd is ok, sure, but 4th and higher are getting too short IMO. With a M this would be nice, as the power band is much smaller, with a 335i with all the torque I do not see the point. (as my car is mainly daily driving, not tracking) Driving on the German highway hitting almost the speed limiter in 7th gear...
	Appreciate 0 Quote

01-25-2010, 02:39 PM	#75
marcel b Lieutenant Colonel 137 Rep 1,898 Posts Drives: F31 340i Join Date: Jun 2009 Location: Europe iTrader: (0)	update. After evaluation of the Quaife and the Drexler LSD I decided to go for the Drexler LSD. Order is placed today. Quaife was more expensive here in Switzerland the one from Drexler, which is crazy, especially when you compare this to the prices from Birds. I also checked to order directly at Birds at arrange the install, but this got really complicated. My dealer give me a quote to do the built in / out, but after asking them again this quote of 400-450 euro was only to built in / out the pumpkin. The could not build in the diff. At that point I gave up. I have a good shop next to the ring who will arrange the Drexler install. They will straight away install the M3 rubber mounts for the rear axle (good to combine this in one go) and the M3 strut brace. I am now discussing with them what king of set-up of I want, as Drexler customizes the LSD to your need. If anybody has suggestions...? Cannot wait till April
	Appreciate 0 Quote

02-22-2010, 04:42 PM	#76
Renus Lieutenant 29 Rep 528 Posts Drives: E92 335i Join Date: Oct 2009 Location: Hong Kong iTrader: (1)	Hey Marcel, can u pls tell what is the best combination for DCT? Quaife + gearset 3.08?
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