EV Fan
07-23-2014, 08:22 AM
Tesla owner Emmanuel Chang had his 2013 Black Tesla Model S P85 dyno tested on a mobile Dynojet recently at some generic car show.
The Model S P85 is officially rated 416 HP (305 Kw) at the motor shaft. This particular combination of dyno and P85 recorded 436 HP (320 Kw) at the wheels. (there is usually a significant drivetrain loss between motor output shaft and wheels)
A few details regarding this test:
1) The tech couldn't attach a sensor to the motor's crank so "engine rpm" has to be recalculated as he took the wheel RPM (so multiply the RPM by 1000, then by 9.71 *approx*)
2) The dyno maxed out at 2000 lbs·ft (2710 Nm) but math from the specs indicates 4301 lbs·ft (5831 Nm) at the wheels. (The P85 outputs 600 Nm peak torque via a 9.73:1 final drive ratio)
3) Horsepower and torque number are inaccurate as the car smoked the tires on the dyno's drum so the wheels were not spinning 1:1 for the computer to measure accurately, basically it has slightly more power than what the computer thinks it has.
http://2.bp.blogspot.com/-D5HUFZsTxD0/U8FRMH8OsaI/AAAAAAAAK9Y/qDJA8IQDQDY/s400/2013+Tesla+Model+S+P85+Dyno+r.jpg (http://2.bp.blogspot.com/-D5HUFZsTxD0/U8FRMH8OsaI/AAAAAAAAK9Y/qDJA8IQDQDY/s1600/2013+Tesla+Model+S+P85+Dyno+r.jpg)
Source: TMC (http://www.teslamotorsclub.com/showthread.php/33413-Tesla-LIED-to-us%21-%28I-maxed-out-a-dyno-in-my-car%29) http://feeds.feedburner.com/~ff/blogspot/pEcq?d=yIl2AUoC8zA (http://feeds.feedburner.com/~ff/blogspot/pEcq?a=W7G8HxDrChs:b4KTO2zfGbc:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/blogspot/pEcq?i=W7G8HxDrChs:b4KTO2zfGbc:V_sGLiPBpWU (http://feeds.feedburner.com/~ff/blogspot/pEcq?a=W7G8HxDrChs:b4KTO2zfGbc:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/blogspot/pEcq?d=qj6IDK7rITs (http://feeds.feedburner.com/~ff/blogspot/pEcq?a=W7G8HxDrChs:b4KTO2zfGbc:qj6IDK7rITs) http://feeds.feedburner.com/~ff/blogspot/pEcq?i=W7G8HxDrChs:b4KTO2zfGbc:gIN9vFwOqvQ (http://feeds.feedburner.com/~ff/blogspot/pEcq?a=W7G8HxDrChs:b4KTO2zfGbc:gIN9vFwOqvQ)
http://feeds.feedburner.com/~r/blogspot/pEcq/~4/W7G8HxDrChs
More... (http://feedproxy.google.com/~r/blogspot/pEcq/~3/W7G8HxDrChs/tesla-model-s-p85-dyno-run-gets-436-hp.html)
The Model S P85 is officially rated 416 HP (305 Kw) at the motor shaft. This particular combination of dyno and P85 recorded 436 HP (320 Kw) at the wheels. (there is usually a significant drivetrain loss between motor output shaft and wheels)
A few details regarding this test:
1) The tech couldn't attach a sensor to the motor's crank so "engine rpm" has to be recalculated as he took the wheel RPM (so multiply the RPM by 1000, then by 9.71 *approx*)
2) The dyno maxed out at 2000 lbs·ft (2710 Nm) but math from the specs indicates 4301 lbs·ft (5831 Nm) at the wheels. (The P85 outputs 600 Nm peak torque via a 9.73:1 final drive ratio)
3) Horsepower and torque number are inaccurate as the car smoked the tires on the dyno's drum so the wheels were not spinning 1:1 for the computer to measure accurately, basically it has slightly more power than what the computer thinks it has.
http://2.bp.blogspot.com/-D5HUFZsTxD0/U8FRMH8OsaI/AAAAAAAAK9Y/qDJA8IQDQDY/s400/2013+Tesla+Model+S+P85+Dyno+r.jpg (http://2.bp.blogspot.com/-D5HUFZsTxD0/U8FRMH8OsaI/AAAAAAAAK9Y/qDJA8IQDQDY/s1600/2013+Tesla+Model+S+P85+Dyno+r.jpg)
Source: TMC (http://www.teslamotorsclub.com/showthread.php/33413-Tesla-LIED-to-us%21-%28I-maxed-out-a-dyno-in-my-car%29) http://feeds.feedburner.com/~ff/blogspot/pEcq?d=yIl2AUoC8zA (http://feeds.feedburner.com/~ff/blogspot/pEcq?a=W7G8HxDrChs:b4KTO2zfGbc:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/blogspot/pEcq?i=W7G8HxDrChs:b4KTO2zfGbc:V_sGLiPBpWU (http://feeds.feedburner.com/~ff/blogspot/pEcq?a=W7G8HxDrChs:b4KTO2zfGbc:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/blogspot/pEcq?d=qj6IDK7rITs (http://feeds.feedburner.com/~ff/blogspot/pEcq?a=W7G8HxDrChs:b4KTO2zfGbc:qj6IDK7rITs) http://feeds.feedburner.com/~ff/blogspot/pEcq?i=W7G8HxDrChs:b4KTO2zfGbc:gIN9vFwOqvQ (http://feeds.feedburner.com/~ff/blogspot/pEcq?a=W7G8HxDrChs:b4KTO2zfGbc:gIN9vFwOqvQ)
http://feeds.feedburner.com/~r/blogspot/pEcq/~4/W7G8HxDrChs
More... (http://feedproxy.google.com/~r/blogspot/pEcq/~3/W7G8HxDrChs/tesla-model-s-p85-dyno-run-gets-436-hp.html)