What I used to do in my 20s-30s wasn't too fast. Today and now that I've 'matured' a bit, it's a lot less. I used to push my '68 fastback Torino well beyond the end of the speedometer and my '63 fastback tri powered 500XL even faster - and on bias rayon tires. Now, the local bikers are killing themselves at a high rate - at least 10 in a 50 or so mile radius in the past couple of weeks and they are usually traveling at close to warp speed which means blotter work for the wipe up crews. In the past couple of weeks, a 193, a 166 and a 143 mph biker has been apprehended on I-87 (amazing how fast those police radios are). Probably many more that got away.

My way of thinking, if you have the vehicle, a decent level of safety equipment, the right place and most importantly, big enough cojones, preferably of tool steel it's what ever limit you want it to be -