Pics of Posi Traction Rear End (40%)
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I don't know why it has taken so long to discover this mod. However, if you can't afford to start with this mod, then all other power mods are rather pointless or a waste of money. :o :o :o

How much for the posi?

How would you quantify the bennifit in a 600 - 700 hp setup. I would be interested in your best guess re: 0-60 0-100 1/4 mile or whatever your are comfortable with.

Mike

Mike,

If you are putting the power down to mostly one rear tire instead of two then you are wasting alot of power. With PSM, when one tire starts to slip, it closes the throttle body. No matter how you look at it, if you slip, you lose acceleration.

Just think back to the old Detroit Muscle Cars with and without Posi Traction. None of the real powerful cars came with anything but Posi Traction. The GT2, GT3, GT3 Cup and GT3RS all have Posi Traction. The turbo does not. The turbo has a mechanical differencial versus the hydralic one used on the racing Porsche's.

The cost of the PT is approximately $1,800.00 plus installation. That is unless you can find yourself a good used one...... like I did. :)

Thanks Chad - sounds mandatory.

I don't know about mandatory. The turbo is plenty fast. It's just when you put the amount you are spending for power upgrades ......... it doesn't make a whole lot of sense if you don't hook it up to the ground.

I really can't believe I went as far as I did without it. :o The old muscle cars used it starting at 350-400 fwhp. :confused: I guess the PSM lets Porsche get away without it at 415 fwhp, but 500 and above with awd seems to be begging for it. Just my opinion. Maybe we can field some other opinions.:cool:

I don't think too many people would argue against the posi unit.:)

I don't believe you will get an arguement, then again maybe there is a reason for not using it. Or someone may have information as to another source of supply. :) I believe it is a lack of knowledge regarding what is available for the 996tt. When you think about it, why would anyone spend $5,000. to $80,000. on power modifications (to make your 996tt quicker) and not install Posi Traction. These cars have been on the market for over three years and we are still learning what can be done with them.

There are hundreds of people who have spent the above sums on power upgrades however, I don't believe you can count on one hand the people who have installed Posi Traction on a 996tt. :( My guess is in the near future there will be alot more. :D

My unit is a Porsche Motorsports part. I wonder if company's like Guard Transmission or Power Haus make these in after market parts?

CJV,

This is great info!!! Is this a direct bolt on part? What is involved in the install and how long does it take?

Thanks,

Craig

Manthay racing's posi, made for the 996 turbo, is a 65% unit. This, somewhat, differs from your 40% unit.

Itis my understanding from S Car Go that it is a 5-6 hour job. Maybe Stephen at Imagine Auto or Todd at EVO could chime in here.

03-turbo911,

That is interesting information. I know they are available @ the above percentage. I was told by S Car Go not to go over 40% for street use on the 996 awd. I am going to have to find out more information about this. :cool:

Hey guys, I have a correction to make about the Posi Traction unit we installed. It is not a 40%. It is a 40-60. That means it varies between 40 and 60%.

You were mentioning some 'problems' could develop if you go over 40% - have you found a way around that?

Zippy,

I should have said "problems" using a 40-60% unit, not 40% unit. Sorry for the bad info the first time around.

Don't think of it as bad info cjv. At this stage, we are all trying to learn what works and what doesn't. How about you get in touch with Olaf Manthay? If you could have a chat with him, you can ask him the reason that makes them use the 60% LSD instead of the 40%-60% unit that you have. At least you'll be talking to an expert in this field who could provide you with what you need to know.