[spuggy]

My $0.02.

If you've never driven a rear-wheel drive car in low-traction conditions, then go to a skid pan and practice making it slide - and counter-steering. Even if you have, take the 911 - it doesn't behave exactly the same as other cars, and you should get a feel for how it behaves, and for how to gauge weight transfer.

It's all about the weight-distribution; the only way I could get the rear to break loose was to approach turn-in at high-RPM/WOT, front suspension light, let the throttle slap entirely shut and turn-in/resume WOT as soon as weight transferred to the front (and unloaded the rear). Then counter-steer through the slide.

I found it very illuminating just how difficult it was to induce the rear to break loose with good tires, even in the wet with abrupt/violent changes of direction (hint: remove anything/everything loose in the cabin first). Took a lot more deliberate effort than I would ever have thought before I tried. Repeatedly.

If you don't lift off the throttle (or brake) whilst turning, you're probably quite unlikely to ever provoke this in normal driving at appropriate speeds... As a rule of thumb, aim to always be, at turn-in, driving the speed you intend to drive through the corner at. If you miscalculate, stick to it - the car is capable, and probably has far more in reserve than you think - driven correctly. Even if it feels pucker-inducing half-way round, unloading the rear is never the right thing to do...

Somewhat counter-intuitively, adding more throttle makes the rear squat, providing more grip at the rear (also unloads the front, reducing traction there). Kind of an advanced technique best avoided mid-corner... Develop your feel for the weight distribution first.

Also of interest may be the "Porsche High-Performance Driving Handbook" by "Quick Vic" Elford, who knew a thing or two about driving Porsches fast - including in rallies on loose surfaces, where much of his early career wins were.

He does talk about how you need to be careful to detect/be ready to control rear-end momentum on a rear-engined car, as pendulum effect will tend to make it get away from you faster than front or mid-engined cars would. As well as explaining concepts like how you can't use more than 100% of the traction available to the tires, and you need to choose whether to use that for braking, steering or transferring power.