lol, on a dynapack useing hub figures abbey and mgt use a 70 hp loss for awd, if your useing 15% as rwd then youd have to use at least 20% for 4wd, a 800 hub hp 4wd car doesnt have over 1000 crank hp. there are arguments both ways at each end of the scale that dont tally up, abbey and mgt know what there talking about rodney they have both built succesful track and drag cars.