Quote:
Originally Posted by N Camarolina
It most definitely IS possible to spin in Sport 1 with all 4 wheels on the asphalt in dry conditions on OEM SC3s. I've managed to do it twice so far under trail braking, and I suspect the cause was a bit too abrupt final release of the brake pedal when near the apex (lots of steering dialed in).
The first time was VIR turn 3, where the induced rotation was beautifully slow and the ECS intervened to catch the rear (successfully) right as I was about to add some counter steer. If I hadn't mentally paused to admire the rotation I had induced, I probably could have added some throttle while opening the wheel to settle the rear and the ECS may not have even intervened.
The second time was at VIR turn 4, where the induced rotation was much faster. This was under aggressive trail braking (where I recorded 1.5 lateral G while still having some longitudonal G from slowing the car). The ECS started trying to catch the rear about 1/4 second before I added opposite steering lock. I overcorrected slightly, but without the countersteer, I do not believe the ECS would have successfully caught the rear, as the yaw rate was quite high.
Word to the wise: When you start practicing and playing with trail braking, be prepared for oversteer and do not assume that ECS will save you, even in PTM Sport 1.
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Agree: it is posssible to lose a car with any nanny. But, it takes a bit of trying
From what you describe, I suspect you engage brakes way too much on corner entry, which is not really producing trail braking per se, but massive amount of understeer, with the fronts sliding, especially with steering lock being added on. Then, when the car slows down closer to the apex and the fronts finally REGAIN GRIP, the rears get violently loose. This is a classic case of snap oversteer.
Often times, the initial understeer puts a driver to sleep, until the fronts regain traction. This is also a classic situation in the wet. So...watch for understeer, as it is not always a benign thing and is capable of causing some truly spectacular wrecks...
Cheers!