View Single Post
Old 01-29-2010, 07:47 PM   #12
Total_Perf_Eng
 
Total_Perf_Eng's Avatar
 
Drives: Corvette
Join Date: Nov 2009
Location: Las Vegas
Posts: 509
Send a message via AIM to Total_Perf_Eng
well, you are partially correct..

The calculation is based off of rpm at 5252. BUT, the horsepower is NOT wrong in any way, shape or form.

It is the sid to side scaling of the chart. It has ZERO to do with the horsepower calculation. That is hard loaded into the hardware stack of the dyno system, and cant able to be modified.

If you look at the graph itself, the max value on the torque side is 700. The max value on the horsepower side is 600. By doing this, it just makes them cross at a goofy rpm, but has nothing to do with the numbers themselves. The graph is nothing more than hundreds of individual data points, made to have the visual look of a lined graph. But this graph is not an aid in the calculation of the power.

**EDIT* I thought you were saying the horsepower in the graph wasn't real. Now I realize you mean that HP isnt real, its just a mathmatical calculation.. So you are 100% correct, not partialy correct. **EDIT**

Quote:
Originally Posted by bilydean View Post
All graphs should cross at 5250 due to the Horsepower calculation. If it crosses anywhere else, then there is a scale issue or an error.
Horsepower = (Torque x RPM) / 5250. Horsepower isn't real. It is a calculation based on torque.

Dean
Total_Perf_Eng is offline   Reply With Quote