[twin turbo]

On my car I have found 550-600 rwhp is the sweet spot (limit) for reasonable street driveability with fresh drag radial tires on good roads during warmer weather. If someone is having problem with spinning their tires at 70 mph running 500 flywheel hp (approx 420 rwhp), then it might be time to look at upgrading tires or checking suspension settings. When I first got my car I had 420 rwhp and had no tire spin in 1st when rolling into the throttle (I had 3.08 rearend gearing at the time). Cheers.