What does LSD stand for?
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M3thod_Man
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M3thod_Man
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Run a search for limited slip, viscous limited slip, lsd, and vlsd. That should learn ya just about whatever you need. Here's the SHORT synopsis: limited slip allows the power to be transferred through BOTH rear drive wheels instead of just one. It has to do with the differential. Yes, it's one of the best upgrades you can do.
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nnkfws333
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You should try using the search button or I did it for you:
http://auto.howstuffworks.com/differential.htm
http://auto.howstuffworks.com/differential.htm
It biases torque between both drive wheels. How they work, depends on their design, but the most common clutch type has loaded clutch packs between the spider gears on each axle. When one axle starts to spin faster (wheelspin) friction from the clutches causes the other to play catch-up and transfer torque to the wheel traveling slower. The biggest advantage of a limited slip differential is turning under hard acceleration, when the cars weight is shifted to the outside wheel it causes the inside wheel to lose traction and start spinning. A LSD will help transfer torque to the outside wheel that has better traction.
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Holisticbeatz
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WingsNThangs
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M3thod_Man
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still have questions = (. Do all 240's come with limited slips? and since the car is rwd, why would you need the vlsd? because of superhicas? superhicas only engages at higher speeds i think, unsure how it works, but its all wheel drive at higher speeds i think... is it necessary/helpful to get a vlsd?
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M3thod_Man
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Super Hicas is Nissan's fancy name for four-wheel-steering, not four-wheel-drive. The reason you would want an VLSD (a type of LSD) is to (somewhat) evenly distribute power to both drive wheel, instead of the wheel with the least ammount of traction, like and open differential would. And it doesnt matter if its RWD, FWD or AWD, if you turn a corner under acceleration with a car equipped with an open differential (no LSD) the inside wheel is going to spin because power is transferred to the path of least resistance, because most of the weight of the car is shifted to the outside wheel in a turn. Ideally in a car equipped with an LSD of some sort either the wheels wont lose traction in a turn or both wheels will lose traction because the LSD biases the torque more evenley to both wheels.
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M3thod_Man
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VLSD is just a type of Limited slip differential. The V stands for viscous coupling. Each axle is attached to the viscous coupling unit in the center of the differential. Inside this coupling unit there are two plates, one attached to each axle. The coupling is filled with a fluid that thickens when the 2 plates, spinning at different speeds, cause friction. When this fluid thickens it helps hold the axles together limiting wheelspin. There are a few common types of LSDs, one being Viscous Limited Slip, then theres clutch type, and helical.
M3thod_Man wrote:Ok i didn't mean to say hicas has all wheel drive i meant steering just came out wrong... I thought VLSD is only for cars with AWD. I still do not understand why you would want a VLSD in a RWD car... LSD takes care of the evening out power in both your rear wheels already... ugh so confused
ok, vlsd is just a form of lsd. in an awd car a lsd is needed in the center diff [at least, in some form] and also most awd cars also have one in the rear as well. basically it just forces both wheels [or the front and rear] to spin at the same speed. an open differential transfers power to the wheel with the least traction.
if your stuck in the mud with an open diff [or doing a burnout] only one wheel will spin. if you have a lsd, both wheels will spin. thats why if an awd car didnt have any form of lsd at all, one wheel losing traction will render the whole system useless.
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deftdrummer
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IvoryJ30t wrote:if your stuck in the mud with an open diff [or doing a burnout] only one wheel will spin. if you have a lsd, both wheels will spin. thats why if an awd car didnt have any form of lsd at all, one wheel losing traction will render the whole system useless.
Not all LSDs function this way, some require a certain torque resistance between the spider gears before it will start limiting the slip, helical limited slip differentials are like this. If you were to put a car equipped with a helical LSD with one wheel on ice and one on concrete, the wheel on ice would spin because there is not enough resistance from the ice to push the pinion gears against the housing and limit the slip. If you know anyone who has a helical type LSD, then put their drive wheels in the air and the transmission in gear. Spin one wheel, notice the other wheel spins the opposite direction just like an open diff. In any clutch type limited slip they would spin the same way. Quaifes (helical LSD) function like an open differential going into a turn and once the resistance torque is reached (which usually isn't much ~20lb-ft) and the pinions start pushing against the differential housing, it starts biasing the torque and limiting wheelspin, providing a smoother transition to oversteer, without it tearing the wheel out of your hands like a clutch type would.
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M3thod_Man
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M3thod_Man
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BuudWeizErr
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