Limited Slip Differentials
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From: Indianapolis, IN
Limited Slip Differentials
Besides 1999, which 996 model years had limited slip differentials? In doing some research, it seems after 2000 (or 2001?), LSD was removed from the options list once PSM became standard on the 996?
Does the current 997 series 911 have LSD--the Cayman and Boxster Ses do NOT?
Short of cost--I can't understand why Porsche does not include a mechanical limited slip differential with their venerable 911 models--my humble E36 M3/4-door comes standard with a limited slip diff (as do all M cars)??!!
I want LSD because I do PCA DEs (currently a CIR PCA and MOR PCA DE instructor).
Thanks in advance.
Does the current 997 series 911 have LSD--the Cayman and Boxster Ses do NOT?
Short of cost--I can't understand why Porsche does not include a mechanical limited slip differential with their venerable 911 models--my humble E36 M3/4-door comes standard with a limited slip diff (as do all M cars)??!!
I want LSD because I do PCA DEs (currently a CIR PCA and MOR PCA DE instructor).
Thanks in advance.
Drifting
Joined: Apr 2006
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From: Out West
I'm no expert here but my thoughts are that ABD Active Brake Differential took its place and is no longer needed. I believe the ABD uses the ABS braking system to sense wheel slippage and brake that wheel which essentially does the same thing as LSD without using mechanical clutches in the diff.
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From: Chicagoland
Active braking systems DO NOT do the same thing as LSD, but do just the opposite. It slows the wheel(s) down to keep them in sync. With active braking systems, the spinning wheel is braked while with LSD, the non moving wheel is engaged. LSD equals better performance when drive traction is at risk.
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From: Indianapolis, IN
Originally Posted by bryanMTL
2004 40th anniversary model has a LSD. I believe they are the only non-gt 996s available with a LSD
Originally Posted by Ed Newman
LSD is a wear item and requires maintenace about once a year on a track car or every 2-3 on a street car.
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Drifting
Joined: Dec 2001
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From: St. Louis
Originally Posted by SleepRM3
The 40th Annie will be tough to find at a reasonable market price. Thanks for the tip. Interesting the 40th Annie uses PSM and a mechanical limited slip?
Brakes are also wear items, and the rear brakes will get worn much faster with ABD engaged often. It's a copout for Porsche--for whom "there is no substitute"--to brake individual L and R rear wheels--a la ABD--to serve as a substitute for a mechanical limited slip diff. Sounds like I'll be shopping for a '99--the "driver's 996"?
Brakes are also wear items, and the rear brakes will get worn much faster with ABD engaged often. It's a copout for Porsche--for whom "there is no substitute"--to brake individual L and R rear wheels--a la ABD--to serve as a substitute for a mechanical limited slip diff. Sounds like I'll be shopping for a '99--the "driver's 996"?
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From: Chicagoland
Originally Posted by Russ Murphy
While I do have a "driver's 996" myself, I'm not sure I'd agree with your assessment. Put me (or you) in my car and then in a 997 and I'm quite sure the lap times would be better in the 997. It's a better car with or without a lsd.
Turn off the 997's PSAM and other electronic "sissy" controls and the same car with LSD is much more controlable around the track and will produce better times. For people who cannot handle competitive speeds around the track, it wouldn't matter.
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From: Indianapolis, IN
Originally Posted by Russ Murphy
While I do have a "driver's 996" myself, I'm not sure I'd agree with your assessment. Put me (or you) in my car and then in a 997 and I'm quite sure the lap times would be better in the 997. It's a better car with or without a lsd.
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From: Indianapolis, IN
Originally Posted by LVDell
So what exactly are you saying Sleeper?
I noticed the 2000 996es had LSD as optional but also have traction control as standard? The 2000 sounds like a winner?!