/ Trap (mph) \ 3
| ------------------| x Vehicle Weight = HP
\ 234 /
this calc seems to be very accurate and indicates the '08 Viper at 3500lbs. race weight would trap ~130MPH with 600 HP. If the weight is 200lbs less it indicates 132mph traps.
Here is a cool calculator for top speed
Top Speed Calculator
It indicates the '08 should do about 205MPH.
Discuss.