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Wavetrac vs Quaife
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07-27-2012, 11:47 PM | #23 | |
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08-13-2012, 01:43 PM | #24 | ||
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09-26-2012, 11:44 PM | #25 |
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How's the LSD going nitehawk?
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09-27-2012, 08:48 AM | #26 |
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I went with a Quaife from VAC on my 335d. I am ecstatic with the improvement in performance and handling. VAC is top-notch!
One silly argument I have heard between Quaife and Wavetrac is that with a Quiafe, if one of your wheels comes off the ground, you lose traction to both. Wavetrac will apparently maintain traction to the wheel still on the pavement. Since I don't have my pilot's license and like to keep my 335d grounded, I stuck with the proven durability of Quaife. Seriously, if you have a rear wheel off the ground, there is nothing an LSD is going to do for you, anyway. Last edited by minus13; 09-27-2012 at 08:54 AM.. |
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09-27-2012, 11:33 AM | #27 |
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Both nitehawk and myself have 1st gear thumps. Some users have reported the same with the Quaife unit. If the chances were far slimmer with the Quaife of getting the thumps, I would have got one without hesitation.
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09-27-2012, 03:06 PM | #28 |
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I know a few guys who run a Quaife and none of them have that thump you're talking about.
How about the guys here who run a Quaife? |
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09-27-2012, 03:17 PM | #29 |
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~16 hours of track time on my Quaife. No thump whatsoever even after I've boiled the diff fluid at the track. Changed fluid, got a cooler, still no issues with Quaife.
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09-27-2012, 04:51 PM | #32 |
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I spent a good track day last Saturday with my Wavetrac with the local chapter BMWCCA in A group...not a single clunk coming from mine. Love it.
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09-27-2012, 06:56 PM | #33 |
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Yeah, seems to be a hit or miss with these clunk noises. Driveabilty wise though, I haven't encountered any issues with 1500kms on it. Powering around a turn in 2nd gear is a total blast.
Wheelhop is more pronounced after getting the LSD. Where before it would dance around, you feel it now fighting for grip. I think the LSD highlights other weak points in my suspension (diff bushings, oe rear links) |
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09-27-2012, 07:44 PM | #34 | |
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09-27-2012, 08:02 PM | #35 |
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09-27-2012, 08:28 PM | #36 |
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I'm doing likewise when the spring hits. My plan is to pick up every piece I need over the fall/winter.
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02-08-2013, 08:54 PM | #37 | |
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02-08-2013, 10:05 PM | #38 | |
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Expect the same performance from Quaife. Greatly reduced wheel hop post-LSD, and handling problems disappeared almost completely with Yellows + M parts. Still not a 911, but its handling is remarkable. Would love t'do that on a diesel. Wavetrac's biggest draw: lower price for same performance. The advantages they advertise I've never noticed. Superb performer. Quaife's made in England; Wavetrac in California. 'Course, maybe you know that! |
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02-09-2013, 12:57 AM | #39 | |
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Since my differential is welded on, cost for either one is virtually identical. Take a look: Link |
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02-10-2013, 01:50 PM | #40 | |
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There is nothing 'silly' about the fact that a Quaife diff doesn't work if one wheel leaves the ground, anything but actually. A Quaife is basically a Torsen (TORque SENsing) helical differential and it does not work if one wheel has zero grip, or is off the ground. On a road car with standard suspension that has plenty of droop and soft anti-roll bars, it's not a problem. With a stiffer setup i.e. uprated springs , shocks and anti-roll bars, droop will be much reduced and can easily cause a wheel to lose contact with the ground on bumps or riding kerbs on track. In this situation a Quaife will not work and traction will be lost. I've used Quaife, Wavetrak and full Motorsport plated diffs on various cars, road and track, over the years. I've had problems with loss of traction after changes in suspension setup, where before the mods, the Quaife worked perfectly, and once changed to a stiffer setup, it was just hopeless, loosing traction very easily. The ultimate mechanical LSD is a plated one. These can give a very high percentage lock-up depending on the number of plates, ramp angle and plate area. Pre-load adjustments can also be made to tweak the diff depending on application, tarmac, gravel etc. The downside is they are noisy, difficult to setup correctly and require maintenance due to wear. The positives are they give great traction thus the choice for hardcore road and track cars. This is the whole reason the Wavetrak was developed. It combines the maintenance free and quiet operation of the Quaife, but still gives great traction if one wheel looses complete grip. It does this because when one wheel looses traction, the plated part of the diff activates, whereas normally the helical torsen part gives lock-up as per the Quaife. The reason the plates don't wear out is because they are only 'used' for a small percentage of the time. So, a Quaife is a great diff if used on a road going car or a track car with decent suspension droop and not too stiff anti-roll bars. On a hardcore setup where one wheel can have a complete loss of grip they do not work. Lastly, a word about Quaife installs that 'clunk'. I personally don't think this is caused by the Quaife unit itself, but down to the install. If backlash isn't measured and adjusted correctly during install, the diff will clunk. Backlash is adjusted by changing the diff bearing shims to obtain the correct bearing pre-load as well as the correct meshing of the crown wheel and pinion. As a lot of these installs require the crown wheel to be machined off the diff due to being welded on as standard, this also requires the back of the crown wheel to be skimmed before drilling, tapping and install to the new diff. This means they cannot be just removed and refitted with the same bearing shims, they must be measured and setup correctly. If not they will clunk. |
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02-25-2014, 11:22 PM | #42 |
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Well after 2 years the Quaife has been absolutely trouble free! Wish I could say the same for the rest of the car, as I had to replace the clutch at 48,000 miles, and had to have a HPFP done at 51,000. Still, I love the car, even though she can be an uppity bitch on occasion. Kinda like dating a supermodel, looks so damn good, but can be high maintenance at times.
Haven't pulled the trigger yet, but plan on M3 suspension bits, a bigger FMIC, and catless DP's for future mods.
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02-26-2014, 04:43 AM | #43 |
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A few guys are also running the OS Giken SL or TCD. That's another one to consider, depending on the goals of the vehicle.
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02-26-2014, 10:32 AM | #44 | |
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Mine has had some issues related to the install, which I think/hope now are fixed. And while I don't mean to scare anyone (i do love the mod), the fact is that BMW machines the snap rings depending of the overall play of tolerances in the diff, and a new diff core will not match the exact dimensions of the old diff, same as another car's core diff dimensions will not match yours (and thus have different snap rings). Depending on the deviations, your shifting will be different. Mine was too, but somehow in time it settled (this last part I can't really explain).
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