Close to 2100lbs with me in it, best way to do it is by mph. So if you use 171mph you come up with ruffly 850rwhp. Wich seems to jive with the amount of fuel we are putting into the motor wich tells me those calcs are pretty close. No exuses but the clutch was slipping it *** of on the run and I loss about 3mph according to the data log. We have adjusted the clutch made some more suspension changes bought some fresh ribber and if all works out look for us to run about 175 soon. And to be honest we really aren't even running as high boost as we did when the car was a unibody on gas making 760rwhp. We still have alot to learn about the new car and setup and hope to improve with every race.