Not true. A good LSD will tend to promote a real-wheel bias even in an awd car. So instead of transferring power/torque to the front wheels when slip is detected, it keeps the rear locked or at least locked down more. It completely changes the handling of the car and on the track enables the driver to "throttle steer" which the turbo does poorly when the majority of the power is being sent up front while also putting down a great deal of additional power. It also keeps the car from getting the rear end shakes under hard braking from high track speeds and takes some getting used to as it becomes quite easy to spin the car (oversteer) coming out of a tight corner when it comes on boil. I think this is why so many of us where intrigued by the possibility of conversion to rwd in the first place.

997 Turbos can be optioned with an LSD but the units are very weak. They are fine for wet pavement, etc. under routine driving conditions but will not hold up on the track. Three or four track days are what most report before they are toast. How do you know if your's is trashed? Easy, watch this.

Mine was non-functional so I had it rebuilt with Guard internals but if your oem did not come with the LSD option it becomes a bit more complicated and expensive. Make sure this isn't the first rebuild your wrench has attempted. And, of course, Guard will be happy to sell you one of their manufactured units. Hope this helps!

 

You lost me

Isn't a LSD important on a RWD car ?

 

Yes, it is. Probably more so than awd since you don't have the fwd component to pull you through when the rear(s) start spinning. But, it's still important on an awd vehicle particularly at the track. Best,

 

Thats what I was originally talking about in my post that your replied "not true"...

RWD = LSD

 

^ Pulling out the intermediate shaft would have been a nice solution. However, not really an option for me at the time as the shop was convinced my front diff had failed. It was boiling over, leaking fluid, and my inner front CV joints would overheat and essentially explode after 80-100 miles of rebuilding the CV joints or replacing the front axles entirely. Pulling the driveshaft would still have left me with the same issues stated above.

 

I know there is a lot of 997 owners that would like convert to this GT2 setup for many reasons.


Its my understanding that "Pureporsche" (from his last update to me) installed a GT2 cluster and was able to bypass a lot of the sensors that control the front drivetrain.


With this information, one would think that two simple swaps regarding the Dif and cluster would lead them to a simple two wheel GT2 conversion.

 

I am not 100% certain installing a GT2 cluster will resolve all or many of the electronic issues. As I have mentioned several times, with the axles & diff removed, the car drove fine under "normal" street conditions. It's when you start pushing it hard on track, where four wheel drifts, slides, oversteer, understeer, and when the inner front wheel leaves the ground While you are trying to put the power down. When stoplight racing and whipping the car around while making "intersection" U-turns...it was a lot of fun... and acted like a RWD vehicle.

 

VID, you would know on this situation and have confirm most of it. I thank you.


I guess my point is, "PurePorsche, did it work at the track?" I'll PM him once again.


A GT2 OEM cluster cost around $3K.

 

The cluster controls a lot of stuff in these cars. The TT cluster expects to see inputs from the front diff otherwise is sends out a fault code which probably puts the car is some sort of a limp mode or reduced performance mode. The GT2 cluster does not do this and remains happy without the front diff input. My bet is it would resolve a lot of issues and work. It's a matter of someone trying it.

There ya go, $1700....

http://www.ebay.co.uk/itm/PORSCHE-91...-/260702465551

 

Wish they shipped to the US!

 

Thanks for the detailed description of what happens!

 

No, just enjoying her on the road for now. Ended up buying another car for the track. So doesn't look like I will have the turbo on the track anytime soon.

 

I removed the front driveshaft as well. No issues at all.

 

What are your thoughts on rwd?