06-04-2017, 08:20 PM | #127 |
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06-04-2017, 08:22 PM | #128 |
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At 11 months smart pit crews insist on a protective suit for one end. Unfortunately, there have been no effective restraining devices developed for the other end. HANS has proved to provide insufficient coverage.
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06-04-2017, 08:28 PM | #129 | |
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This is why wheel speed isn't important in understanding how a Torsen works. Also why this is the only type of diff to fit into a fwd chassis. Imagine how a clutch type LSD operates in a fwd car if the driver tries to change the steering angle under hard acceleration and then consider how a Torsen equipped car would behave. Some think a Torsen limits wheelspin in a progressive way, as does a clutch type LSD. This is not the case. A Torsen prevents wheelspin completely until the bias ratio is exceeded. There is no waiting. As soon as the torque starts to split unequally the Torsen "locks up" from a torque delivery perspective. It continues to allow driven wheel differentiation at all times, but that force has to originate at the wheel because the diff only allows the side gear to drive the "spider gears", never in the other direction. In very low grip situations such as snow or ice a high bias ratio Torsen can cause quite abrupt loss of traction. Under acceleration both drive wheels will spin readily. The rear axle will oversteer abruptly if the throttle is opened just a little bit too rapidly. Because it transfers torque before allowing any wheelspin the transition from grip to very little grip can be quite immediate. The Torsen is an ingenious invention. Gleasman must have been a fascinating mind to meet. I prefer not to refer to the Torsen as a limited slip differential in part because it prevents drive wheel slip completely until there insufficient traction. The Torsen in action doesn't just limit slip. The flip side of this locking action is that no grip means no limiting of the slip. In that sense the Torsen acts like a locker diff. Unlike a locker it simultaneously allows the driven wheels to differentiate in a forwards direction. Because the helical gears cannot drive the side gears they effectively lock if torque is applied to the diff carrier. However, if the driven wheels need to differentiate the side gear can drive the helical pinion gears allowing the outside wheel to continue to travel faster than the inside wheel in a corner all while not wasting any usable engine torque. Ingenious. Last edited by Gforce; 06-04-2017 at 10:51 PM. |
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06-04-2017, 08:34 PM | #130 | |
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Anyone yet caught the full comedic impact of the diversion off topic here? The subject line of the thread has just acquired a whole new level of meaning...just don't add limited slip to the discussion. |
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06-04-2017, 08:48 PM | #131 |
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Well, now ..... @Tcoat asked the same question.
Since it's made of plastic and most likely made in China, the parts didn't seem to want to fit together very good. So, I just heated them up over a warm burner and smashed them together, with the help of a large rubber hammer. I kept another burner on HI with a flat headed screwdriver heating up, which I used to "weld" the pieces together ...... thus eliminating the need for those poorly made screws and bolts that I have a hard time figuring out which ones goes where. Bubba taught me that trick ...... humfrz |
06-04-2017, 08:58 PM | #132 | |
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Ahhh...... but some didn't learn the technique of dealing with the oversteer so good ...and suffered some head injuries ........ right @Scrappydoo ....... humfrz |
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06-04-2017, 10:22 PM | #133 | |
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not in the way that is being described here. If you affect the LSD to an extent that damage is causing noticable sway, that LSD is so far gone it wouldn't even be drivable/very noticable during turns etc. I personally think the OP is either poor or a moron for not following good driving practices. OP you can fight me if you want. You'll lose. |
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06-04-2017, 10:24 PM | #134 | |
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06-04-2017, 10:53 PM | #135 | |
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06-05-2017, 05:04 PM | #136 | |
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The Following User Says Thank You to driftartist For This Useful Post: | humfrz (06-05-2017) |
06-05-2017, 09:35 PM | #137 | |
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-check pressures -make sure the tires are mounted in the correct direction -if everything else is OK, you may have gotten bad tires. It happens and it can be very dangerous. Jack the car up and inspect those rear tires |
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06-06-2017, 05:09 PM | #138 | ||||
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(FTR "wheelspeed" doesn't dictate how much a clutch-type locks or biases torque, either.) In both the clutch type and the torsen limited slips, torque is transferred from one output to the other via friction. In the clutch-type the friction is between clutch plates, in the Torsen T2 it's between the helical gears and the casing resulting from axial force in these gears. If you have different rear tire sizes, rear outputs will be rotating at different speeds and this friction will generate heat and wear parts at a greatly increased rate. Running a smaller-diameter space-saver spare on the drive end of the car with a either type is not a good idea. Tremendously greater heat and wear due to the different rotational speeds of the outputs. They're only intended/designed to operate like that briefly while cornering, not continuously. Quote:
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Torsens can and do WEAR. And driving on one for a significant amount of time/distance with different diameter tires will accelerate this wear. But I don't think 50 miles normal driving would do anything catastrophic... |
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06-07-2017, 03:24 PM | #139 |
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You do realize you just thanked Ubersuber for technical "knowledge" right?
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06-07-2017, 03:29 PM | #140 | |
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Thank you! Glad to hear there are others that understand how they actually work. This was the whole statement from the beginning. The original question was will it cause harm with "extended" use. Not will it cause harm.
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