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BMW 3-Series (E90 E92) Forum
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Wavetrac Differentials vs. Quaife ATB Differential for RWD 335i
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View Poll Results: Wavetrac Differential or Quaife ATB Differential | |||
Wavetrac LSD Differential | 75 | 46.88% | |
Quaife ATB LSD Differential | 77 | 48.13% | |
Other... | 8 | 5.00% | |
Voters: 160. You may not vote on this poll |
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03-07-2010, 12:12 PM | #23 | |
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Thanks everyone for their input ... keep them coming...
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03-07-2010, 05:40 PM | #24 |
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www.shonutperformance.com/Wavetrac.htm
"Autotech is very excited with the positive feedback they have already received from Wavetracs already out in the field for other applications, including a 740+ WHP drag car. Our testing has shown that the Wavetrac works as well as (or better than) a Quaife, and feels slightly more aggressive. The Wave Design Center Pack really does work, and provides traction to the wheel with grip, even if the other wheel is in the air. The Wavetrac is much quieter than a Quaife in situations where the Quaife is noisy, such as hard turns from a stop under power, and we expect the same results with winter driving. ..... In fact, we are so excited and confident about the new features that we are replacing the Quaifes in all of our cars with the Wavetrac units, since they should perform better in winter driving when one-wheel-on-ice is very common, and it's a (noisy) nuisance when the Quaife goes 'open' in that situation. "
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03-08-2010, 02:27 AM | #25 |
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03-08-2010, 04:47 AM | #26 |
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Many good points in this thread about both units. The thing is that it is hard to argue against the reputation of Quaife. They have been building bullet proof setups for a long, long time. One other thing to consider is that BMW uses an inner scrolled output shaft bore on the standard final drive to protect against seizure. Obviously BMW felt this was necessary to protect against seizure. The Quaife does indeed reproduce the scrolled output shaft bore on all their units, but the Wavetrac unit has a plain output shaft.
Many of us are obviously thinking of which LSD to use. Recently, I had to decide myself which LSD I wanted on my car and have been doing the same research. My LSD is on the way and I will be doing the upgrade when I do my clutch shortly. I will have my thoughts in a review and DIY shortly after the installation. |
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03-08-2010, 11:16 AM | #28 | |
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So on which one did you decide...? I think I'll add Poll button to this thread if I still can...
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03-08-2010, 02:16 PM | #29 | |
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But unfortunately that issue seems to be the biggest one around the Qauife vs. Wavetrac discussion and it seems to me to be completely out of proportion in reality to the typical 335 driver. Both diffs act a like an open diff during regular driving, which makes them better then locker style diffs for average driver. Both act the same in the turn, progressively biasing power out to the wheel with the most traction. Anyone driving both of them on a 335 on the same track would doubtfully be able to tell you which is which. It’s only in the extreme element that a wheel has zero traction (as in completely in the air) that they differ. The “wave” in Wavetrac describes the wave profile of the side gears. When there is any difference in the rotation of the gears relative to each other the profile causes the gears to move apart from each other and one side moves up against a set of high friction plates causing a “pre-load”. The Quaife does not have this ability to pre-load. The question is, how often will you be in this situation? This is a far bigger issue with the front-wheel drive crowd which can and often do get a front wheel up in the air (I’ve done it in my car also). But getting the rear wheel completely off the ground on a 3500lbs car is a whole ‘nother thing. If you are concerned about traction and acceleration during that scenario then you probably should be running a locker diff (+ roll cage, track insurance, etc.). Also, even in the most extreme situation where you have a wheel off the ground or super ice with a quaife, a simple light press of the brakes will create pre-load. These are probable more important issues to concern yourself with: Price: I think the wavetrac is cheaper Warranty: Quaife offers a lifetime warranty, even if the car is used to race. Wavetrac offers a limited Lifetime warranty. Service: Quaife uses floating helical gears which some say makes it more “bullet” proof and requires no servicing. Wavetrac: The thing is, in turns the wheels are turning at different speeds so the diff will engage the high friction pads often. I would imaging this means the Wavetrac diff will need to be serviced more frequently the Quaife. Reputation: Quaife has been around for along time, with an excellent reputation. Wavetrac is fairly new. Other: Quaife is made in Europe so parts, service may be impacted. Wavetrac is made in the USA Also, it appears you can tune the Wavetrac by adjusting the friction pads. So there |
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03-08-2010, 02:52 PM | #30 |
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Been running the WaveT unit since Aug.
Works flawless - don't even know its back there until you look in the mirror and see two real good lines Its probably gonna be kind of difficult for someone to speak first hand about BOTH units. g/l
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03-08-2010, 10:51 PM | #31 | |
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03-08-2010, 10:53 PM | #32 |
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LOL.... LUV to read funny posts.... good one
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03-09-2010, 05:16 AM | #33 | |
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03-09-2010, 02:57 PM | #34 | |
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There's a guy at the n54 site that owns a high HP vw jetta who said his wavetrac siezed once. I think they resolved it for him and told him that it was the only time it ever happened though. I think he has like 600+whp.
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03-09-2010, 08:45 PM | #36 |
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That will be great . I've certainly read few of yours previous reviews on other areas of upgrades you've done and they've been very educational.
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03-09-2010, 08:46 PM | #37 |
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But some how it doesn't surprise me since you're now a re-seller of it ...
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03-09-2010, 09:24 PM | #38 |
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after reading this im thinking about getting the wavetrac once im already
I have a question tho how do you know if you have a welded diff??
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03-09-2010, 09:36 PM | #39 |
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03-09-2010, 10:05 PM | #40 | |
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"Since March, 2007 production, BMW has fitted rear axles where the ring gear is welded to the differential carrier" http://wavetrac.net/application_bmw335.htm
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03-09-2010, 10:14 PM | #41 | |
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03-09-2010, 10:46 PM | #42 | |
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Send PM to Craig@SupremePower, as a Wavetrac re-seller he should be able to tell you if you provide him with the production date and transmission type.
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12.770 @ 112.81 mph||slip||JB4|FMIC|DPs|DCI|N54 DVs|ER CP|Koni FSD|Eibach-Pro|F Strut-bar|R Sway-bar|Hankooks V12|DPE SP16|BBK|15%Tint|CF Front Lip|CF Diffuser|M3 Spoiler|SmartTop|LUX AE|Debadged Last edited by Belarus; 03-09-2010 at 11:07 PM.. |
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03-09-2010, 10:47 PM | #43 |
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What type of maintenance is required with Quaife and Wavetrac differentials ?
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03-10-2010, 04:53 AM | #44 |
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Thanks Belarus. It arrived yesterday, so I am now just waiting on my clutch/flywheel. I am really hopeful I can get everything installed this weekend.
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