LSD - mechanical or electronically simulated? - LotusTalk - The Lotus Cars Community
 
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post #1 of 13 (permalink) Old 06-14-2010, 04:10 PM Thread Starter
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LSD - mechanical or electronically simulated?

Is the Lotus LSD option a real mechanical LSD or is it simulated and controlled by the ECU like TC?
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post #2 of 13 (permalink) Old 06-14-2010, 04:18 PM
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Its a Torsen LSD. And a clutch type is optional on the cup cars.

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post #3 of 13 (permalink) Old 06-14-2010, 04:20 PM
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Originally Posted by ZJChaser View Post
Its a Torsen LSD. And a clutch type is optional on the cup cars.
+1

In other words, self-contained mechanical LSD.
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post #4 of 13 (permalink) Old 06-14-2010, 04:48 PM
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Just buy one already


how much HP do you have MD?

Last edited by Hello Kitty; 06-14-2010 at 05:00 PM.
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post #5 of 13 (permalink) Old 06-14-2010, 07:21 PM Thread Starter
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Actually I already got one. My 05 Elise came with the LSD and TC options installed. I am the second owner, so am getting familiar with the car. Stock engine, no mods...
Yet.
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post #6 of 13 (permalink) Old 06-14-2010, 08:39 PM
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My Nissan Titan was advertised as having a LSD as standard equip. I soon found out it was simulated with the brakes. It's completely worthless. I'm glad lotus didn't try this crap.
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post #7 of 13 (permalink) Old 06-15-2010, 08:30 AM
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How do you identify a car with LSD? Is it in the VIN or can you visually identify it somehow?
Perhaps if it has traction control it has an LSD?

I am looking at 05's and I have heard that a few of them have LSD.

Thanks,
Jeff B
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post #8 of 13 (permalink) Old 06-15-2010, 09:29 AM
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How do you identify a car with LSD? Is it in the VIN or can you visually identify it somehow?
Perhaps if it has traction control it has an LSD?

I am looking at 05's and I have heard that a few of them have LSD.

Thanks,
Jeff B
"LSD" is hand written on the transmission case
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post #9 of 13 (permalink) Old 06-15-2010, 11:01 AM
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That's a good visual clue! I suppose it's visible from the top?
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post #10 of 13 (permalink) Old 06-15-2010, 11:16 AM
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Originally Posted by jvbrugger View Post
How do you identify a car with LSD? Is it in the VIN or can you visually identify it somehow?
Perhaps if it has traction control it has an LSD?

I am looking at 05's and I have heard that a few of them have LSD.

Thanks,
Jeff B
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Originally Posted by Hello Kitty View Post
"LSD" is hand written on the transmission case
There is nothing in the VIN that encodes the options (although you could call LCU with the VIN and ask them what options the car had).

You can have traction control without LSD. You cannot have LSD without traction control.

The writing on the transmission (or rather the lack of it) is not a guarantee one way or the other that there is a LSD (although if it's written there , it's more probable).

Other than calling LCU with the VIN, the only practical way to determine the existence of an LSD is to park the car with one wheel on dirt/gravel/grass and the other on dry pavement. Rev the engine, drop the clutch and check for wheel spin. If only one wheel spins (the one on the dirt/gravel/grass) you probably have an open differential. If both wheels spin, you probably have an LSD. If neither wheel spins, you either didn't turn off the Traction Control, or you didn't try hard enough. YMMV - and you may void your warranty doing the test.




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post #11 of 13 (permalink) Old 06-15-2010, 04:04 PM
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There is a white sticker on the top of the transmission with a 6 or a 7 digit alpha numeric in the middle. ONE of those digits indicates if its Open or Lsd. I'm too lazy to search but its in a thread around here.

Of course, it doesn't help if the sticker fell of the trans
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post #12 of 13 (permalink) Old 06-15-2010, 10:11 PM
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There is a factory decal on top of the ECU that reads TC & LSD which indicates the car has traction control and limited slip diff.

05 Saffron yellow,LSS ,hard top and nothing else! 91 Mazda Miata se British racing green with hard top
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post #13 of 13 (permalink) Old 06-16-2010, 01:57 AM Thread Starter
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Roger that, there is a sticker on the ECU stating what it has.
Mine says TC & LSD.
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