It took a LOT of foot. The rear suspension must have been twisted like a pretzel, but it worked. Believe me, it was pushing it. The real problem isn't holding the car it's what it does loading the rear suspension before it launches. If you wind it so much that it takes all of the movement out of the suspension, the suspension can't move and launches like there is no suspension. Totally different than a trans brake launch if you think about it. No matter how much you push a TB launch it doesn't wind-up the rear suspension. A good 60ft off a FB launch is hard because of what it does to the suspension BEFORE you launch it.