Thanks For that mine was on a hub dyno and only gave me power/torque ATW.Its 18% loss, beware on dyno dynamics as none of the shootout modes match this, make sure you get the very accurate and important wheels figures. There is a very long standing debate over the fixed or percentage method, both sides have valid points. If at all unsure I always just give the wheels figures as at the end of the day, that's what's being laid down to the tarmac.
Hub dyno is at the hubs with wheels/tyres removed. You should be very close to the flywheel figure on a hub dyno.Thanks For that mine was on a hub dyno and only gave me power/torque ATW.
Was just wondering what sort of drive loss from wheels to fly.
...and how exactly did you CALCULATE that Mark?R35GTR we have calculated that you loss around 75bhp from all 4 hubs to the flywheel on a Dynapack dyno.
Just on my way back from a tuning trip to Croatia will post some stock GTR Runs on our Dynapack when I am back in the office.
Jamie, 902 Flywheel on Dyno Dynamics is CALCULATED what was the Dyno Dynamics ATW figure which is measured ?(assuming no slip logged on dyno)Ive been on a fair few dynos over the years and have always found hub dynos very close to the flywheel figures ive seen on a dyno dynamics, before i went crazy with the power my supra made 902bhp flywheel at SRR and the next day did 915 atw's on a dynapack hub dyno.
A lot of chassis dyno's use an assumed inertia value. If you put lightweight wheels and tyres on vs heavy ones the flywheel figure should not change but it does. Wheel should change in this scenarioJamie, 902 Flywheel on Dyno Dynamics is CALCULATED what was the Dyno Dynamics ATW figure which is measured ?(assuming no slip logged on dyno)