Depends on your setup, if you have no sway bar, or a stiffer one on medium ot low stiffness, it's not much different as the TT doesnt put much power to the front anyways unless you are sideways at which point it helps make for controllable oversteer.

500 + hp, no LSD, RWD and stiff sway bar are the worst case scenario (the only one I've tried) and yeah that can be tricky. But if you have extra power you'll have to modulate the throttle regardless. 911's give good rear end grip so as long as you're skillful with the go pedal, you'll be ok.

 

Great thread guys.

Seems like it really depends on individual driving experience nd taste!

 

Very interesting!!!!!!!!

 

getting mine done as we speak

 

Here's one of my recent posts about the topic. Cool upgrade if you do a suspension too...otherwise it is dangerous and your car will be slower due to constant tire spin.

https://www.6speedonline.com/forums/...9&postcount=14

 

I can't believe I read the whole thing! lol

This is what I gleaned from reading all 27 pages. The Cliff Notes version, if you will.

It really seems to come down to simple physics. Less weight (mass) given identical power (force) = greater acceleration.

The arm moment from our cars CG to the physical location of the engine gives our cars an inherent tendency to want to swap ends in certain conditions. The AWD and PSM help to counteract this to a large degree. Once one removes these attributes it changes our cars dynamics to mimic, to some degree, the GT2s. However, unless the car is optimized in all of the ways discussed, in previous posts, our cars are inherently less stable than the GT2. If one couples that with a lot of hp you have a less stable car. That's about it. I'm off to take an asprin

 

Interestingly, Porsche's own *famous* factory test driver who has signed off on all Porsche designs from 911's to 993's to 997's and now to the Carrera GT will say the following:

QUOTE: Walter Röhrl

"For track only use I prefer the 2WD setup for Porsche. If you told me it was a car I would drive on the street for three years, I could not live without 4WD because of the extra grip, control and stability that it gives me for everyday use."

This is from a guy who one would think could live without "control" and could handle anything in his sleep....

This is from a guy who puts 30K miles a year on his (annually issued) factory *driver* and then drives the **** out of everything else in between at Porsche's own factory racetrack and others (Nuremberg). This and also some great advice from some nameless (local) factory 997 GT3 CUP drivers has caused me to decide that I am better off with 700 Crank HP on the street when I have the added benefit of all wheel drive.

 

^^^^Speed Yellow^^^^

I am in 100% agreement for my power level, skill level and the way I drive my car!

MK

 

Woods,

When you have formula drivers telling you that "THEY WOULD NOT DO 2WD ON THE STREET" in a Porsche it's got to be the best endorsement of all time... Clearly for them it's *NOT* abilities based. They consider AWD as a huge control advantage and NOT a performance disadvantage.

It's a mistake to consider anything else unless you really enjoy the "relative lack of control" as some kind of macho thing.

Begs the question: Why don't all race-cars then have AWD? Here are some of my own thoughts mixed with facts that I have gleaned from the community.

The *TRUTH* of AWD cars on the street vs a racetrack is simply this:

The front differential in Porsche is 95% disengaged (5%-10% power to the front wheels) virtually at all times. In a racing situation, this tends to be different. The PROBLEM of AWD for a racetrack is that the REAR wheels tend to MASSIVELY-OVER-ROTATE relative to the front wheels (lots more wheel spin) so it's perhaps likened to locking down your AWD car and doing successive DYNO RUNS on a 2WD dynamometer (thus freezing the front tires in place) and what happens in this example is that the viscous coupler and differential get very hot.

Under racing conditions this huge heat problem pretty much invalidates the AWD component (and related benefits) ~ repeated: Due to the heat involved and the tendency of the rear tires to continuously over-rotate relative to the front wheel (rear wheel spin) so racers do the 2WD instead to avoid this rotational condition and in the process gain a small weight advantage while losing a *slight* control advantage. The only reason it's not the loss of a *MASSIVE* control advantage is because when the viscous coupler and the front differential get really hot (under racing conditions) the benefits of having a front end "pulling for you" essentially decreases as the heat in the box and the front differential and the viscous coupler increases. The pulling just doesn't happen at some point due to all of the heat. We never see this heat condition on the street but at the track, after hours of this kind of activity, unlike our *real world* club-racing where we get our 20 minute sessions, the front differential and related viscous coupler are going to be essentially shot until they are given the opportunity to cool off. I have likewise (recently) been talked out of a GT-2 purchase for the same reasons. Why do something that's materially to my disadvantage?

 

SpeedYellow,
I don't know what occupation you are in; but when you talk, I listen.

 

Yea, the things you learn around here is just amazing. The 6 is the best.

 

Speedyellow, you are worse then the GTR bench racers, and putting words and different intent into Mr. Rohl's words.. He said for EVERY DAY use the AWD is better, it's a given, it's obvious, for all out performance? RWD as he mentioned...

You guy's need to experience them both and make your own judgement, I can go on and on with facts and info, handling/skidpad numbers of RWD cars that exceed awd car's by A LOT, and not to mention racecar's run in the wet and different weather conditions (Porsche started with RALLYING)

 

Is this thread back to where it was 20 pages ago?

There is no better, just different. AWD has plenty of wins and penalties to show for it's potential on the track. But still has it's drawbacks, just like it's advantages.

 

For the way that I drive my car, I prefer RWD on the street over AWD. But AWD definitely has it's advantages.

 

+1 Having come from a Supra and M3, I've always have had a preference for RWD.