Big weight savings but I'm sure big pain in the butt also?

 

While it physically can be done, unless you can program the electronic brake bias and stability control to recognize the new condition the car will cook the rear brakes. Someone here let a shop disconnect the front driveshaft to run a 2wd dyno and it literally killed his braking system to the point of a complete loss. IIRC Porsche also denied his warranty claim

 

Just thinking outloud.

 

What's the point? If you really wanted a 2WD Turbo then get a GT2.

 

Many 993 and 996 owners have done their own "GT2/2wd" mods to their cars and kept the tens of thousands saved in the piggy banks.

I want to back-up a step and say that it could probably be done and be ok if you never did a 2wd dyno pull with the front wheels stopped. The only reason the brakes got killed was the car sensed the difference in rotating speeds of the F&R tires and applied mucho brake pressure to try to "stabilize" the mismatch. If you were just driving with all 4 wheels turning it may not be an issue....

 

This happened to me and I posted it. I was wondering if you were referring to my post or was there another post on this? I'm still curious why this happened to me on a 2 wheel dyno. Thanks

 

Vincy, I was referring you your case specifically. Did you ever get your car fixed completely?

To sum up what happened to your car, the stability control built into our cars checks how fast each wheel is turning and compares it to the others. When the speeds become mismatched then it thinks the car is skidding or going out of control. It will then apply the brakes to the wheels that are turning faster than the others to equalize things. In your dyno case, the front wheel were at 0mph and the rears at 0-100mph or so. That triggered the stability control to try to slow the rear wheels down to 0 mph to match the fronts. At the same time the dyno operator is giving the car full throttle. The brakes on the rear then just cooked. It would have been about like driving with the ebrake on for 10 minutes at 100mph. You can imagine something would get overloaded and it was your brakes.

 

Vincy-

We dyno these cars regularly. I'm a bit shocked. Why would you not drive it up here and let us do it????

 

I got things fixed but not by a Porsche dealer. A local shop did the work. They put on GT2 pads and put in some other fluid. Its like night and day. The pedal is firmer, there is good initial bite, and it just feels better. Some of the improvement may be the Porsche dealer never knew how to bleed the brakes.

About cooking the rear brakes I was told they dynoed many 4 wheel cars with the front wheels disconnected. Maybe something changed for the 997.

 

Mike, you are correct, I should have driven up to your shop. I thought I could save time by doing it locally.I guess you have a 4 wheel dyno.

Is there anything knew on intakes and HP? You know the car since you put in the Giac tune. I remember something about a new plenum? Thanks.

 

I guess there is a difference between 996 & 997 as a lot of people are doing the conversion on the 996.

 

We do. It's a mechanically linked Mustang AWD Chassis Dyno.

I know we are not right around the corner, but you should keep us in mind next time.