Hi Ron,

I will start with the easy one first. As you can find out by
hovering the mouse of the red triangle in the spreadsheet, I
describe the stall speed as "The rpm held off the line until the
clutch/torque convertor fully engages". This is because you always
use the clutch to take off, and you will slip the clutch at first
and only let it fully engage at a certain speed. The rpm and kph
that the clutch finally fully engages is the stall speed. If you
normally get wheelspin here then you can put the speed the wheelspin
normally stops here.

If your curves on the traction curve never cross, then it means a
combination of things. Either your engine breathes fantastically
well and the torque never flattens off, or your gears are spaced too
widely apart. It means you will need to rev it out to redline to get
the best time. The best gear shift point calc should reflect this.

As for imperial units, welcome to the new millenium and metric
units :)

I have made some attempt for you US/UK guys. The input and engine
sheets have unit toggles, but the other sheets don't yet. Maybe next
version :)

Cheers,
Wes

--- In exceldyno@yahoogroups.com, "Ron Roberts" <4bluemoon2@...>
wrote:
>
> Hi Wes,
> I haven't played with the dyno in a long time as I was unable to
down load
> it for a while. But now I can again. The newer format seems to
work well. I
> had to figure out how to plug in my own data since that was one of
the
> changes, but once I figured it out it was easier to make small
changes and
> see the results. I have a few questions though in interpreting
data. On the
> traction chart, my gears never cross, but rather each higher gear
falls a
> meter or so per sec^2 lower than where the previous gear left off.
What does
> that tell you about the gearing? Gears spaced too far for the
power band?
>
> Also, can you explain about "stall" It is the first item on the
shift rpm
> chart on the input page.
>
> Just a suggestion: it would be nice for us that are metricly
challanged, if
> we could have a box to click to convert to SAE units. for some of
the
> charts. Yeah,, BOO HOO HOO! LOL
>
> BTW, All that help you gave me with converting torque to
accellaration has
> been usefull, or at least interseting, in tuning my new 2270 T4. I
make
> changes and then clock accelaration every 1000 RPM and can chart
the torque.
>
> Take care,
> Ron
>