Integrating tork over rpm?

["Graydon D. Stuckey" <graydon@apollo.gmi.edu>]

On Thu, 8 Feb 1996, Hans Frisak wrote:

> I have made a table for the audi S4 turbo, which has 350 Nm @ 1950 rpm and
> 230 hp @ 5900 rpm.
> 
> Rpm     Nm      Hp
> 1000	200	28
> 1500	260	56
> 2000	350	100
> 2500	345	123
> 3000	330	141
> 3500	315	157
> 4000	300	171
> 4500	292	187
> 5000	288	205
> 5500	280	219
> 6000	269	230
> 6500	240	222
> 7000	215	214

Where did you get these numbers?  Were they published somewhere?

	I have always thought that to get a really good picture of the 
potential effectiveness of an engine, we aught to integrate the torque 
curve over the RPM, to get a feeling for how much power the engine makes 
over it's entire operating range.  This would really show up the broad 
torque bands of low rpm turbo motors, and the peaky VTECs, and 2-strokes 
would start to lose their appeal.

> rpms, and a hefty 170 hp at 4000. Whether it has 230 or 240 hp at 6000 rpms
> doesn't really matter as long as the power is what it is at all other revs.

Good point.

Later,								
Graydon D. Stuckey								
graydon@apollo.gmi.edu								
Flint, Michigan   USA
'86 Audi 5000 CS Turbo Quattro, GDS Racing Stage II				
'85 Mazda RX7 GS 12A-leaning-towards-a-13B-soon