The more power you create and the higher rpm you go the more loss will be created. I dont think any % would be accurate.

 

the percentage is based on many factors. you would have to calculate the moment on every spinning part and sum up the forces to get something approximate. then you divide the forces opposing the power to how much power at the crank and you'll get your percentage. the percentage will be different on each car due to the different wheels and tires everybody runs. it's a pretty long process but i'm sure there are things on google that can approximate everything.

 

Well put, I was being lazy and didn't wanna write an essay....LOL

 

Exactly... which means the iPhone or whatever was saying his car made 193hp... at the wheels. If he had of put in 20% loss, it'd show a figure 20% greater than that, giving engine horsepower.

My point was, his car doesn't make 193 hp at the wheels. I know there is variation from manufacturer specs... but a car quoted to make 190 hp at the crank isn't going to make more at the wheels.

 

you also have to factor in how much a persons clutch slips

 

It bases it off of g forces so if your clutch is slipping then you wont get as much g force. It can accurately calculate wheel hp but it will never get crank hp accurately. Wheel hp is what matters anyways so who cares.

 

i know im bringing back the dead w/ this one but my buddy has this program. and after a 3 dyno runs at the local shop, then 3 runs w/ the ifone it was only off by about 3whp on average. the hardest part is just gettin the phone to not move at all.

 

ya that can be difficult. today i flew home and on take off i measured the g's we pulled and it was .22g on take off but there was a cross wind and had like .17g's of sideways. the phone was on my armrest and did not move at all.

 

Guy at Eurojet was talking to me and my friend about it too day, said he was suprised.. it was like 10hp/torque or whatever off cars that they just had on the dyno.

 

anyone know if there's a similar version for the Dare (Verizon's competition for the iPhone)?