Im looking for people to do a little experiment for me.
I have a formaula for calculating rolling resistance and HP need to keep a car or truck moving at a given speed.
All I need from people is drive down the road at 75 (no wind and flat road) then with a timer in hand. through the transmission into N and time how long it takes the truck to go from 75 to 65 mph. and report that and you curb weight. from that i can calculate the HP needed to maintain that speed. I just think that my blazer has some major drag to it.

Thanks for every ones help.