Traditional Limited Slip vs. Torque Bias, Please eduficate me! |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Traditional Limited Slip vs. Torque Bias, Please eduficate me! |
SirAndy |
Apr 22 2010, 03:40 PM
Post
#1
|
Resident German Group: Admin Posts: 41,815 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Purpose of the car, in order:
Spirited street driving, occasional AX, occasional track days. Here's what i think i know (IMG:style_emoticons/default/biggrin.gif) LSD - Always locks wheels together under acceleration and deceleration. - Introduces understeer in slow corners. - Generally considered the better choice for the big track. TB - Only locks wheels under acceleration. - Acts like a open diff if a driving wheel is off the ground. So, the question is, what should i get for my 915??? The car will never be a dedicated track car, it's mostly driven on the street. The TB seems to be easier to drive on the street. However, the slow corner understeer of a LSD could probably be tuned down with suspension settings. The TB loses it's magick if one wheel is off the ground. In an AX setting, the suspension would need to be pretty stiff to keep both wheels on the ground at all times, would a LSD be the better choice here? Anyone compared the two back to back in a 914? (IMG:style_emoticons/default/idea.gif) Andy |
PRS914-6 |
Apr 24 2010, 10:38 AM
Post
#2
|
Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None |
It should be noted that the reason you hear the comparisons of LS vs TB is that when you stand on the throttle on a TB it locks harder and less when you are off throttle and why it's called TB because its the amount of torque applied that determines it's lock amount. This is great for AX for tight turns when you are off the throttle and don't want the rear wheels pushing you straight and also good for the street. When you want to apply a 3.6 to the ground in a straight line it's hard to beat. However, as others noted both wheels have to be on the ground to get the benefits. TB is maintenance free
The LS on the other hand works on a percentage of lock that is determined by the assembly and clutch pack and isn't variable when you are on and off the throttle but keeps you driving even if one tire is loose. A clear benefit. The same benefit can be a drawback on the tight corners of an AX where the outside tire is turning much faster than the inside tire and the lock of the LS wants to turn them at the same speed.....The car wants to go straight but suspension setup can reduce that. LS requires clutch pack replacement once in awhile but not so frequently that I would not buy one because of it. They each have pros and cons for sure and your car setup, tire size and stickiness should be considered. For me it is a no brainer to go TB since I don't race and just do spirited street driving and need to get 3.6 power to the ground and nothing more. Also, I think it's inappropriate to "directly" compare a 911's response to these vs a 914. They handle completely different. Snow.....LSD will get you moving but will also want to drive you straight. It's a double edged sword. Something to be at least aware of. Hopefully this info helps out. |
Lo-Fi Version | Time is now: 27th September 2024 - 01:14 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |