kens911

OK i know this has been discussed at length. I have read all the threads that I could find. But I still have a few questions based on my recent experiences with my first DE. first of all I spun out while accelerating out of a corner once the first day.And on the second day got it sideways but was able to correct from carrying too much speed into a corner. I have so much power coming out of corners in a low gear on boost that the instructor made me run the course in 3rd gear. So aside from learning to drive. I have been rethinking wheather or not to put in a LSD. I had a Pontiac years ago that had a LSD in it and it broke loose or corners all the time due to the added friction of the tires rotating at different speeds. so I have thought the torque biasing differential might be a better way to go. All of the threads i have read the guys who have the LSD swear by them and so the the guys who have the torque biasing. So can any one who has had both, give me any advice? I will not be racing the car I will be taking it to DE's until I can drive it. It is hard enough to drive that the instructor on the second day of the DE was not willing to drive it himself the first lap due to seeing how much power it had the previous day lol.

nathanUK '81 930 G50

I have no personal experience. I think my car just has a regular Porsche LSD.
BUT, all the things I have read on the net suggest that for high speed track driving the LSD is better. For autocross which is lower speeds the TB is better as the car is more movable.

I hope we get an answer. I'm guessing that the LSD is a better option as correcting things at low speed is much safer than at high speed

Mo Mia

hi ken .... considering it was your first DE perhaps you need to get more used to the car on the track and where it makes power. at my first DE a few years back i spun twice and that was on the orientation lap. it was simply a case of red mist or if you like high anticipation and the horns came out. all us first timers are guilty of going in too hot into corners and then trying to jump on the gas too early. in my limited experience with my 930 (no LSD) it is always safer to brake hard and accelerate hard in a straight line and maintain constant throttle to the apex else it will break traction and the back will overtake you. there are obviously tons of different driving styles and this is just my 2c worth (as it helped me when i first started out) for you to try befor spending bucks on LSD and TB.

Mo Mia

sorry ... i know you said ... "So aside from learning to drive" ... what i was really trying to say is that it will get easier the more days you go out on

DDD

I personally would get torque biasing by Gaurd for a street car. I wouldn't consider LSD very seriously on a car that was spending 90% of the time on a road, turning in and out of driveways, ect..

Erik @ Carquip

I would have to agree with you DDD, a torque biased differential is the way to go if your car is going to be on the street the majority of the time. We stock and carry the GT units here, and I can tell you that they are the best, period. I have never had any issues with them and they are practically plug and play most of the time.

Let me know if I can be of any help.

Erik @ Carquip
(303) 443-1343 ext 2

kens911

I spent a while on the phone today with the guy at guard transmission and for the way my car is set up and the type of driving I do the 40/60 would probably be best but I was shocked at the price. about double what I expected. I could install a large portion of the elephant racing suspension goodies for what that thing costs, and he has them back ordered so not much chance of the price dropping. I guess I'll wait and see how much overitme I have in the next few weeks.

DDD

Welcome to the P-car world. LOL.

Everything is DOUBLE PRICE and then some...

nathanUK '81 930 G50

Ken, did you decide if you will get a TB or LSD?

kens911

LSD 40/60 but still suffering from sticker shock.

nathanUK '81 930 G50

Did you also discuss how much tq before it allows slip?

kens911

yes and the diference between those and the stock ones.

nathanUK '81 930 G50

Well, what I was really asking was what tq you were advised to go with?

kens911

the 40 /60 lsd not the torque biasing.

Olli

Following up on Nathan's and Ken's posts above, would be interesting to have someone explain the numbers in an easy to understand way.

My own layman's dangerous understanding about the above numbers is that they are locking percentages at acceleration and deceleration. And the numbers would indicate the maximum difference between the applied torque between the rear wheels., i.e the accel number of 40 would equate to a power distribution of 30:70 (diff of 40 and still adds up to 100), and the decel number of 60 would equate to a power distribution of 20:80 (diff of 60 and still adds up to a 100).

I'm not sure though that the above is an answer to Nathan's question though. I thought that the power distribution takes place gradually as the slipping starts happening.
Anyhow, as I said, this post is only to instigate someone to explain it properly.