dyno stuff

[Len Sabatine]

     Dyno Outputs need to be C factored [ corrected to Standard Temp, 
Pressure ]
     @ time of test to avoid pie in the sky Torque and Power #s. The Dyno SW
     should be doing this as default. Tire slip can also generate false 
data. Got
     to watch the variables like a hawk when Dyno Testing. Interestingly , 
1 vehicle
    can be tested on 2 Dynos and come away with 2 differing results , 
beyond the
    error % desired.
    Len

>I've already had better answers than SnapOn has been able to supply me in
>the past two years...thanks guys. Don't get me wrong--I think this dyno has
>great potential--it'll hold back a 750HP Dyno'd engine (biggest one I've had
>on it yet) at any speed--so I'm happy about that. I just can't print off a
>torque and HP graph of any type or sort.
>
>Lyndon.
>----- Original Message -----
>From: Eric Bryant <BRYANTE at ghsp.com>
>To: <gmecm at diy-efi.org>
>Sent: Wednesday, May 02, 2001 1:25 PM
>Subject: RE: dyno stuff
>
>
> > > Clear--perfectly. There's no data to "input" into the MAHA software.
> > > Therefore it is
> > > measuring raw data at the rear wheels. Just having a little
> > > trouble how the
> > > HP numbers
> > > are calculated...
> > >
> >
> > Well, torque multiplication is RPM division.  The equation for HP is:
> >
> > HP = RPM*Torque(ft-lbs)/5252
> >
> > So, if the torque is multiplied and the rotational speed is divided by an
> > equal factor, HP comes out to be the same.  That's what the dyno is
> > calculating.
> >
> > Eric Bryant
> > mailto:bryante at ghsp.com
> > http://www.novagate.com/~bryante
> >
> > --------------------------------------------------------------------------
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>
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