Retro fit LSD - another thread, but for a 993.
Discussion
Serious mileage driving around the Pyrenees. Fast roads, haipins, lots of hard braking, turning hard acceleration, gearchanging etc etc.
The lads do it on bikes, I now do it these days in the car (dodgy ankle) and take their luggage. A few years back I took a MINI GP complete with factory LSD and just about destroyed it. The GP was very fast around the mountains, I mean 1000CC superbikes couldn't get away from her as long as there wasn't long straights etc, she just felt like she was on rails.
I now have a 993 C2, who's about to have a new clucth and flywheel fitted, as well as RS short shift, new dampers, springs etc. I will be taking her around the mouintains hopefully later this year. She will not be abused as the GP, but she will be used hard.
I've been informed that for the kind of driving I do in the mountains (I do not drive her like it in the UK or do trackdays), a LSD would be beneficial, but this was told to me in the pub by a bloke with a dodgy tash.
My question is to the all knowing. For the kind of fast mountain driving I do, would it be something worthwhile, or a waste of money, and if worthwhile, which one, and is there any negatives to having one installed?
Mucho Gracias
The lads do it on bikes, I now do it these days in the car (dodgy ankle) and take their luggage. A few years back I took a MINI GP complete with factory LSD and just about destroyed it. The GP was very fast around the mountains, I mean 1000CC superbikes couldn't get away from her as long as there wasn't long straights etc, she just felt like she was on rails.
I now have a 993 C2, who's about to have a new clucth and flywheel fitted, as well as RS short shift, new dampers, springs etc. I will be taking her around the mouintains hopefully later this year. She will not be abused as the GP, but she will be used hard.
I've been informed that for the kind of driving I do in the mountains (I do not drive her like it in the UK or do trackdays), a LSD would be beneficial, but this was told to me in the pub by a bloke with a dodgy tash.
My question is to the all knowing. For the kind of fast mountain driving I do, would it be something worthwhile, or a waste of money, and if worthwhile, which one, and is there any negatives to having one installed?
Mucho Gracias
Boo152 said:
Hmmm Warren.
I diagnose a severe case of creeping upgraditus here.
Have you been spending a bit too much time on Jackals Forge by any chance?
However I have sought refuge and now live the life of a virtual Monk and pray daily to old Ferdinand to keep me on the straight and narrow .....
Short shift kit ....... Do I need one? Nope. Guess what came in the post yesterday.
Help
Well to answer the question:
Yes it would be of benefit. I had a Kaaz LSD fitted to my 968 Club Sport. I could definitely carry more speed through corners and hard braking also seemed more stable.
But it was a bit noisy and in a road car you should definitely give thought to that. I'm by no means an experienced track driver but having gotten very comfortable handing the car pre LSD, I had to learn again once fitted. Maybe a factor of carrying more speed.
Yes it would be of benefit. I had a Kaaz LSD fitted to my 968 Club Sport. I could definitely carry more speed through corners and hard braking also seemed more stable.
But it was a bit noisy and in a road car you should definitely give thought to that. I'm by no means an experienced track driver but having gotten very comfortable handing the car pre LSD, I had to learn again once fitted. Maybe a factor of carrying more speed.
mohitos said:
Well to answer the question:
Yes it would be of benefit. I had a Kaaz LSD fitted to my 968 Club Sport. I could definitely carry more speed through corners and hard braking also seemed more stable.
But it was a bit noisy and in a road car you should definitely give thought to that. I'm by no means an experienced track driver but having gotten very comfortable handing the car pre LSD, I had to learn again once fitted. Maybe a factor of carrying more speed.
Yes, I heard about the hard braking and stability. This is why I thought it might be good for a rear engined heavy motor.Yes it would be of benefit. I had a Kaaz LSD fitted to my 968 Club Sport. I could definitely carry more speed through corners and hard braking also seemed more stable.
But it was a bit noisy and in a road car you should definitely give thought to that. I'm by no means an experienced track driver but having gotten very comfortable handing the car pre LSD, I had to learn again once fitted. Maybe a factor of carrying more speed.
Hadn't realised there was extra noise in the cabin though.
Wozy68 said:
Yes, I heard about the hard braking and stability. This is why I thought it might be good for a rear engined heavy motor.
Hadn't realised there was extra noise in the cabin though.
I have a Kaaz LSD in my 911SC and am very happy with it.Hadn't realised there was extra noise in the cabin though.
The installation was done by Tuthills at the same time as a suspension upgrade and corner-weighting etc, so these are all inter-related, but the stability under braking is greatly improved and I've seen no tendency to understeer excessively on track. I don't have intrusive cabin noise either.
I too am a victim of Jackals website... ( should we set up a support group?)
Replaced my clutch with an RS item and fell into the "while you're in there" trap and ended up with a single mass flywheel and a KAAZ diff.
EMC fitted my KAAZ diff, they did the one in my 968 race car so it was an easy choice for me. - Ive not managed to take the 993 on track so can only comment on the road behaviour. Its more more eager to attack the twists now and I do feel a lot more confident on the brakes.
I do have a 'bit' of extra chatter in the cabin when Im at idle in neutral but I'm guessing thats more to do with the flywheel.
Replaced my clutch with an RS item and fell into the "while you're in there" trap and ended up with a single mass flywheel and a KAAZ diff.
EMC fitted my KAAZ diff, they did the one in my 968 race car so it was an easy choice for me. - Ive not managed to take the 993 on track so can only comment on the road behaviour. Its more more eager to attack the twists now and I do feel a lot more confident on the brakes.
I do have a 'bit' of extra chatter in the cabin when Im at idle in neutral but I'm guessing thats more to do with the flywheel.
It's a good if fairly expensive mod. Certainly in slippy conditions it helps traction and gives a lot of confidence to get on it early... but tbh I notice it more under heavy braking when the rear feels more tied down. There should be no extra noise with an LSD except a little chatter when turning while parking for example. On slower tight turns there is some understeer. These comments are for a ZF plate type diff, I've not tried the torque type LSD.
I got a Quaif Torsen (torque biasingl) dif for my old C2 along with the suspension and it made a massive difference.
I wasn't racing it or doing many track days at that time and didn't fancy the under steer so it made sense.
It was 895 quid and JZ Machtech fitted it for me (they also replaced the fork selector in the gearbox that wear prematurely).
The comparative LSD was 1400 at the time, money wasn't the issue I just thought it better for road use to get the Torsen one, I've now got a Motorsport LSD in the turbo along with a ton of other chassis stuff and it's not so road friendly
I wasn't racing it or doing many track days at that time and didn't fancy the under steer so it made sense.
It was 895 quid and JZ Machtech fitted it for me (they also replaced the fork selector in the gearbox that wear prematurely).
The comparative LSD was 1400 at the time, money wasn't the issue I just thought it better for road use to get the Torsen one, I've now got a Motorsport LSD in the turbo along with a ton of other chassis stuff and it's not so road friendly
johnycarrera said:
I got a Quaif Torsen (torque biasingl) dif for my old C2 along with the suspension and it made a massive difference.
I wasn't racing it or doing many track days at that time and didn't fancy the under steer so it made sense.
It was 895 quid and JZ Machtech fitted it for me (they also replaced the fork selector in the gearbox that wear prematurely).
The comparative LSD was 1400 at the time, money wasn't the issue I just thought it better for road use to get the Torsen one, I've now got a Motorsport LSD in the turbo along with a ton of other chassis stuff and it's not so road friendly
+1 for the quaife - road friendly slip ratios and maintenance free :-)I wasn't racing it or doing many track days at that time and didn't fancy the under steer so it made sense.
It was 895 quid and JZ Machtech fitted it for me (they also replaced the fork selector in the gearbox that wear prematurely).
The comparative LSD was 1400 at the time, money wasn't the issue I just thought it better for road use to get the Torsen one, I've now got a Motorsport LSD in the turbo along with a ton of other chassis stuff and it's not so road friendly
ras62 said:
Doesn't the Quaife type only operate on the acceleration side i.e no lock on deceleration?
Something rings a bell about that being correct yes, Quaiffe do several diffs but the Torsen one is as you say. Just worth thinking about as I found it to work really well on the road
Have resurrected a previous 993 LSD thread with a question on Wavetrac diffs which might be of interest (especially for me if you can provide feedback on them!)....
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Greg964 said:
I popped a Quaife in my 964c2 back in 2006 and have enjoyed it ever since. Braking stability, better grip out of corners & it makes no noise. but nevermind all that sensible stuff, an LSD gives you the wonderful ability to stay sideways for far longer.
I had a special edition 996 fitted with the LSD option - spent many happy minutes looking out of the passenger window and driving forwards!S-02s didn't last long either ;-)
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