Motor Torque, where is it measured?

Can you give us any specifics? The more we know the better we can answer.

Dyno measurements can also be tweaked to BS in many different ways. It's also possible to back calculate from boost and air-flow to work out just now much "correction" has been added.

If you want a really accurate dyno. Go hit the Otira Viaduct in the highest possible gear and tell me your vehicles weight and speed. Some helpful civil engineers gave me the exact slope so from the speed and weight I can tell you how much power you're putting to the ground.

Quote:

---

Originally Posted by Dougal

.....

If you want a really accurate dyno. Go hit the Otira Viaduct in the highest possible gear and tell me your vehicles weight and speed. Some helpful civil engineers gave me the exact slope so from the speed and weight I can tell you how much power you're putting to the ground.

---

But not how much you are putting into moving air (increases as the square of the speed and for most vehicles represents a large proportion of the power expended above about 60kph) or heating your tyres.

John

Quote:

---

Originally Posted by JDNSW

But not how much you are putting into moving air (increases as the square of the speed and for most vehicles represents a large proportion of the power expended above about 60kph) or heating your tyres.

John

---

Wind resistance is very easy to quantify (Cd, A, V etc), it's accounted for in my calculation sheets.
It's for measuring how much power you are putting to the ground, there is no practical use for knowing how much drag is in each tyre tread.