Is there a correlation?

[Bill Verburg]

Originally Posted by j911brick

Maybe somebody can explain this?

I was at a dyno one day and a Honda had a flat torque curve. Pretty much straight all the way across. But the HP curve was as one would expect. Is this even possible with a mathematical model?

Also: I have always wondered: wouldn't changing tire diameter effect the dyno results? Why or why/not?

depends on whatt you mean by expect

hp is a quantity which is calculated from a measured quantity, torque

the calculation is
HP = (rpm x torque)/5250

here is a result based on a totally imaginary engine w/ 200 lb-ft of toque at every rpm from 3200 to 7200, the hp curve will constantly rise, now this never happens so any variation in torque will cause a consequent variation in hp

[j911brick]

Thanks Bill. I probably could have figured it out if I sat down and did the math, but thanks again. Big help.

Originally Posted by Bill Verburg

Sure it's possible

hp is a quantity which is calculated from a measured quantity, torque

the calculation is
HP = (rpm x torque)/5250

here is a result based on a totally imaginary engine w/ 200 lb-ft of toque at every rpm from 3200 to 7200

[Bill Verburg]

Originally Posted by j911brick

Thanks Bill. I probably could have figured it out if I sat down and did the math, but thanks again. Big help.

That graph was posted by mistake, it shows the hp curve of a modified engine from one data set but the torque curve from a theoretical engine, I corrected the mistake