Quaife Engineering has been in the forefront of high performance transmission technology since 1965. On the Torsen website they do not list the application for the SVT yet so I couldn't find a comparison to the FX4 unit. "The Rexxus" <==== the VIP Lexus LS400 build, http://en.wikipedia.org/wiki/Limited_slip_differential, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Then based on hexial cut gears meshing with eachother and additional gears, and the fluid in the diff the friction in those gears causes a ratio of the torque to go to the wheel that is rotating slower than the other. Is the unit they are manufacturing for the SVT Getrag similar in design to the diff that was made for the Ranger FX4s? That is great. The purpose is to allow for different speeds between the two wheels, while torque split is held constant at 50/50. Advertisement . Joined Jan 16, 2017 Posts 373 Reaction score 108 Location Marysville, Jefferson Vehicle(s) The Torsen 2R has a strong bias to get back on full lockup quicker than a T2 or any clutch LSD will. like everything, people try ONE thing and then preach that it's the "bee's Knee's". 2. I am taking what I can get at this point, besides some engineering data is still better than hype and speculation that has been thrown around so far. The later Torsen T-2 (Type B) uses a parallel gear arrangement to achieve a similar effect. A Quiaffe or Torsen are not Limited Slip Differentials. All gear LSDs (including Torsen®, Truetrac®, Quaife®, Peloquin, OBX, etc.) work in basically the same manner: they divide the drive torque between the two axles, applying drive to … Which is fine for racing, or very spirited driving. JavaScript is disabled. To lockers vs torsen center. Make LE's efforts sustainable. ­The Torsen (from Torque Sensing) works as an open differential when the amount of torque going to each wheel is equal.As soon as one wheel starts to lose traction, the difference in torque causes the gears in the Torsen differential to bind together. This clever design revolutionised the differential market - offering a superior level of performance and warranties compared to its competitors. In an automobile, such limited slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity. Which would be my experience as well. + Quaife vs Wavetec by Hank » Thu May 30, 2013 9:34 pm They are adjustable with different shims, just like they are in Quattro Torsen apps. Quaife vs other torque-biasing differentials. A Torsen differential, which is a type of helical differential, does not use clutches as a traditional LSD does. either way i think the torsen will be a good thing because it'll sure drag the price of the quaife down a bit at least. The Type C is I realize this is probably not an easy question to answer unless you are in the diff design business - I had an FX4 and the Torsen it had was really great. El Torsen tiene algo más de capacidad de bloqueo que el Quaife, en el caso del S2000 no sé los números exactos pero en otros coches suele ser 2.5:1 para el Quaife y 3:1 para el Torsen. Advantages of the quaife are: * More progressive in operation - the clutch type will be sudden when engaging * Maintenance free - the clutch type will require occasional adjustment, depending on usage. What are the design tradeoffs that come with a higher bias? This is to all the SVT owners who have been drooling for the new Torsen to come out at a cheaper price point than the Quaife is for the SVT. Is the standard LSD or torsen better for drag racing? That way, the torque required to break the tire free would be greater, and hopefully greater than the torque required for the differential to operate differently than an open diff. Torque biasing does not necessarily limit slip. A day at the skidpad for drifting practice in the BMW 135i with a Helical Gear LSD! The Quaife almost guarantees traction during split traction events due to the amount of gears that are required to rotate in so many different axis. Help us to make future videos for you. and in english please lol. The engineers only have access to the engeneering prints for the product they are working on, and sometimes only the part they are working on. Instead, it uses gears that can provide instant response to changes in traction. The TBR is a very difficult thing to measure (we know this from our work with OEM diffs) and actually not very useful. This lines up well with some research I did a few years ago where it pointed to a Quaife being "greater than" the typical accepted value of 2:1, and a Torsen being "less than" the typical accepted value of 3:1. JavaScript is disabled. All other torque-biasing differentials on the market are either copies or modified versions of the Quaife LSD. TO make it simple it makes both wheels spin instead of one it splits the power between the 2. Just a curious thought. On loose surfaces what you could find is strong torque steer. Off throttle.... could be up to interpretation. Well one thing this site and many others are not getting too redily is actual factory data on engineering specs for parts. In this situation the Quaife differential’s inherent torque transfer characteristics work in reverse to transfer torque away from the locking wheel. There is also a specialist application of the T-2, known as the T-2R (RaceMaster). The internal gearing creates thrust forces rather than relying on spring or hydro mechanisms. It will bias the torque more severe than the Torsen. SJulian10mm Well-Known Member. This gear kit went on to compete with considerable success at the famous Daytona events, embodied a philosophy that still central to Quaife-that of affordable excellence. ok , i knida understand what an lsd is , but exactly how does it help you , on the launch , what is its exact function ? Quaife Engineering has been in the forefront of high performance transmission technology since 1965. I will not make any more arguments. 3. Getrag is very careful about who gets access to what. What would yall say the pros and cons of the Torsen vs the standard LSD are? Beware of imitations! For everyday driving the Torsen is fine, it's 'better' than an open center and will mimic the locked center up to front wheel spin in a straight line. This is where the parking brake "trick" can help out. Nothing but issues with the Quaifes we had. Open differentials are the most basic form of a differential. i think F2 was trying to get Kaaz to start making and selling their plate dif again... don't know if it's reality or not, yet.... Forum community dedicated to Ford Focus owners and enthusiasts. A Torsen style differential like the Quaife and the Torsen T-1 have helical gears, so you were correct there, the off-the-shelf Torsen T-2 for the SVT Ford Focus and MINI has parallel gears, close enough to be partially correct. The difference between the gripper and the quaife is the gripper is a clutch type diff and the quaife is a gear type "or torsen" The Clutch type diffs work based on wheel speed, after one wheel spins x% faster then the other it starts locking up to slow down the fast wheel and speed up the slow wheel. For a better experience, please enable JavaScript in your browser before proceeding. again im not saying he is wrong, i'd just think a second opinion is definitely a good thing. Torsen is the brand name of the limited slip differential available in Miatas from 1994-2005. Quaife Engineering Ltd is a British manufacturer of automotive drivetrain products, specialising in performance transmissions, gearkits & differentials. Quaife sells it on their own website as a "Helical LSD". Please support us at Patreon.com ! I think your only difference will be 2.5:1 bias v. 4.5:1 bias. Despite unfounded claims of superior quality or performance, they don't have the track record of proven reliability. All of these 4.3 differentials also came with a Type 1 or a Type 2 Torsen, the Type 2s coming from post 96 special edition cars. Secondly in our opinion they sell an inferior product that is way overpriced. A torsen will wear in such that on a split, you can still do a 1-legger. hmm that is very interesting, but no offense to your source, i'd like a confirmation from a second source or even torsen/quaife. The name comes from the term Torque-Sensing, and is gear driven, unlike other types of LSD's which are viscous or clutch type. The type 2 is a marginally stronger design, but both will hold in excess of 250ftlbs of torque. A limited slip differential (LSD) is a modified or derived type of differential gear arrangement that allows for some difference in rotational velocity of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. Rodney Quaife produced the first 5 speed gear cluster for a Triumph motorcycle. It appears that under throttle they do. what works best in an AutoX/road course setup is highly dependant on the car, drive train layout and speeds at which the car will reach. Realmente no hay mucha diferencia entre ambos, en teoría el Quaife induciría menos subviraje a la entrada de la curva pero tendría aportaría menos capacidad de tracción que el Torsen. What it means is that via the ring gear, there is X amount of torque being fed to the diff. Re: Quaife, pros and cons. The gear differential is typically more expensive than the other types, but it also has nothing to wear out or adjust. I think it is more important for people to understand the basics behind what they're buying and what the resultant driving behavior is once they're on the road. Its technicly designed better and for more harsh driving. The Quaife almost guarantees traction during split traction events due to the amount of gears that are required to rotate in so many different axis. The ATB (Ashcroft, Quaife) style differentials are stronger still and are likely to outlast the rest of the drivetrain. in the focus world, simply because there are no serious plate-type difs on the market as an option, everyone just defaults between the quaife and the torsen. So, even if a wheel is airborne, torque is applied to the other side. Come join the discussion about RS/ST performance, modifications, troubleshooting, maintenance, and more! Torsen Differential: The Torsen (Torque – Sensing) differential employs the use of some clever gearing to produce the same effect as a limited Slip Differential without the need for clutches or fluid resistance. The Gripper is a Weisman-type LSD, which we used in our 300-bhp rally car (see my avatar). The Torsen differential* is a purely mechanical device; it has no electronics, clutches or viscous fluids. Anyone know why Torsen would go with a 2.5:1 bias and not something higher? Since the forward bias is the same or nearly the same that means the helical angles are the same or nearly the same. It also has a nasty habit of loosing torque completely when you lift a wheel (which is why you never hear off road guys even consider them, or if they do to talk about applying the brakes to induce drag on the free spinning wheel). Limited-Slip Differential vs Torsen. If that's the case, I made the wrong decision, which explains why I still sometimes only see one patch when launching. THeres hardly an english way to explain how an ATB diff works. Correct? Another benefit is that the gears don’t … The bias ratio for both units is around 2.1:1. Complete Acronym/Abbreviaton and Forum Terminology List, http://www.focusfanatics.com/forum/announcement.php?f=90, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Come join the discussion about SVT performance, modifications, classifieds, troubleshooting, maintenance, and more! The factory BMW Motorosports LSD are gear types (like MFactory Wavetrac, Quaife), and honestly as good or better than all of the above. It achieves this by adding a layer of worm gearing to the traditional gear set up of an open differential. Thank you for this first hand information. A torsen will wear in such that on a split, you can still do a 1-legger. If one wheel were raised in the air, the regular Torsen units would act like an open differential, and no torque would be transferred to the other wheel. so i guess ur guy at getrag basically is saying shell out the extra $ and get the quaife cause it works better. We do not use or quote TBR figures as they don't really mean much to anyone. For racing, or very spirited driving a 2.5:1 bias v. 4.5:1 bias something higher proven.... Name of the Torsen becomes an open differential our opinion they sell an inferior product that is way overpriced point., quaife ) style differentials are the two best options t … us. 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