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BMW 3-Series (E90 E92) Forum
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Quaife vs Wavetrac vs OS Giken
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02-17-2013, 09:34 AM | #45 |
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The VAC differential cover works for any of them. Wavetrac, Quaife, or OSG.
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02-17-2013, 09:38 AM | #46 | |
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2021 X3 M40i: M Sport Differential, Adaptive M Suspension.
Previous BMWs: 1971 BMW 2002, 1973 BMW R75/5, and 2011 BMW 335d Previous Other Vehicles: '67 Cougar, '70 911e, '86 Jetta Diesel, '05 and '12 Foresters, et al. |
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02-17-2013, 09:39 AM | #47 |
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Do you plan to track the car? If so, then I'd say yes.
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02-17-2013, 09:56 AM | #48 |
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Some of the more clever forum members would say "if you are spending so much money on your suspension, why are you not tracking it?". Which would be a good question of course even though I want it to handle equally well on the street. But the simple answer is most likely I would not do much more than a couple of HPDEs a year. Unless of course I catch the track fever. But the old reflexes are not what they used to be, and am not Paul Newman, so my estimate is priobably realistic. Who knows. $800 is a lot of money for a diff cover.
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2021 X3 M40i: M Sport Differential, Adaptive M Suspension.
Previous BMWs: 1971 BMW 2002, 1973 BMW R75/5, and 2011 BMW 335d Previous Other Vehicles: '67 Cougar, '70 911e, '86 Jetta Diesel, '05 and '12 Foresters, et al. |
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02-17-2013, 09:59 AM | #49 | |
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02-17-2013, 10:03 AM | #50 |
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02-20-2013, 07:47 PM | #52 |
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I love my VAC cover. And I had VAC send a drain plug to Gold Plug and they put a huge monster GOLD magnet on it. I love driveline bling. The factory cover has no drain. Really, no drain? PITA for oil changes... and the VAC cover has more capacity, cooling fins and is billet aluminum for heat transfer. Plus it looks awsome from behind. To other gear heads.
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02-20-2013, 08:35 PM | #53 | |
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02-20-2013, 11:10 PM | #54 | |
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02-20-2013, 11:16 PM | #55 |
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I have to say, I'd not go for a Quaife if I do plan to track my car. I have an OSG in my e36 and my bro has an OSG in his MS3, they are superior than the Quaife type LSD I had in my MZ3.
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02-21-2013, 05:47 AM | #56 | |
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02-21-2013, 05:50 AM | #57 | |||||
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If it’s mainly a road car, a pure helical is fit and forget, quiet and maintenance free. Quote:
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The OS Superlock will be available in 1, 1.5 or 2 way. 1.5 way is exactly what you want for a RWD track/race car. This means it has maximum lock-up on acceleration (% lock-up depending on plate config, ramp angle and oil used) and a smaller percentage lock-up on deceleration (off throttle and braking) This slight lock-up on decel helps keep the rear end stable. It is not ‘open’ when you let off the throttle! A 2 way diff isn’t called as such because it works under zero load (nothing to do with it) it is because it has the same percentage lock-up under acceleration and deceleration, and only really to be fitted to a ‘drift’ car due to the oversteer characteristics it causes. Quote:
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Basically these are some guidelines for using the different diffs. For a mainly road car, with occasional trackwork where the suspension droop is adequate to not cause a lifted wheel, the Quaife diff is preferable. If there is any possibility of lifting a wheel a Wavetrac is preferential. For maximum traction and lock-up and much better adjustability, but will require more maintenance and not fit and forget, the full plated diff such as the OS, is preferable. |
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02-21-2013, 06:03 AM | #58 |
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Good post Techevo.
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02-21-2013, 06:30 AM | #59 |
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^+1
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02-21-2013, 12:54 PM | #62 |
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02-21-2013, 01:34 PM | #63 |
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Sweet. I'm leaning towards the Super Lock too.
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02-21-2013, 02:45 PM | #64 | |
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02-21-2013, 03:21 PM | #65 |
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As a point of reference, VAC Motorsports is putting a Quaife on mine, and my suspension is going to be modded as follows: M3 Rear Subframe Bushings, all the M3 Suspension Components Kit from GetBMWParts.com (front and rear arms, both sways), AC Schnitzer Springs, and JRZ RS1 dampers. I mention this because VAC is still suggesting Quaife is best for me. Granted I will only track a couple of times a year at HPDE.
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2021 X3 M40i: M Sport Differential, Adaptive M Suspension.
Previous BMWs: 1971 BMW 2002, 1973 BMW R75/5, and 2011 BMW 335d Previous Other Vehicles: '67 Cougar, '70 911e, '86 Jetta Diesel, '05 and '12 Foresters, et al. |
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02-21-2013, 03:33 PM | #66 |
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Don't forget to upgrade your differential bushings as well. Makes sense to do it when your differential is getting done.
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