Quote:
Originally Posted by wookwook
yeah. so wrapping my brain around the torque and hp. So torque is measured and HP is calculated using RPM with a variable factor of 5252. That is how they are linked. The how one reads the chart is "how much work is it taking (HP) to make the force applied (TQ) to the contact patch on the tire", using 1-1 which 4th gear on M6 is 1-1 with the obvious inherent errors, like factory calibration for tire size, air pressure diameter, slippage, etc. but its close enough for our purposes. You can get much higher TQ readings using more leverage with lower gears, but usually in reporting stuff, its assumed your talking 1-1.
Also you may not get the right result if you are trying this on a level surface. You have to use a good incline so all the work of the engine is required and can be measured. That's why on my dyno run, I could smell some rubber burning off the rollers. I found a spot that is about 3000 ft of steady incline with an on ramp so I can start from a slow speed in 4th, and get the full pull to about 5k before it gets dicey.
|
That's some good explanation right there. I'll add if your auto 1:1 is 6th gear but the way the auto is geared your closer to actual pavement to tire in 5th gear.