[F500] 493 - 494 dyno curves

[A. E. Trier]

Hi Jay,

Glad to see that these graphs were published. They are the same ones I
put on the list last year but with no graph lines transposed :-( and the
vertical axis identified as being originally newton meters. The math
whizs' out there should confirm the information now as correct. I found
out about what was wrong with my graphs about a month ago but didn't have
the computer capability to correct it. Anyway, I didn't want to upset Dan
again <g>. Nice job.

Art
 
On Fri, 30 Jan 2004 22:49:10 -0500 "Jay Novak" <jnovak6 at wideopenwest.com>
writes:
> OK guys, I have been trying to get dyno data from Rotax for a couple 
> of
> weeks.  I just got it last Monday by fax.  I finished putting 
> together a
> graph comparing the data of the torque & hp of PRODUCTION STOCK 493 
> &
> non Rave 494.  The data that I received was in metric units, Nm 
> torque
> (Newton-metres) & engine rpm (also had Kw, fuel flow etc).  The 
> faxes
> were Rotax data sheets.  I copied the data to Excel, converted the
> metric torque data to ft-lbs & then calculated the SAE hp.  Take a 
> look
> at graph at the link below & I think you will see that we have two 
> very
> similar engines.  I put lots of notes on the graph defining some of 
> the
> variations in the 2 engines.  I think that they are amazingly close
> above 6000 RPM for being totally different designs. (Reed vs. 
> rotary
> valve).  It is pretty clear to me that the performance will be VERY
> similar in the cars.  Remember these 2 curves represent the 
> engine's
> performance with production exhaust systems & not your typical Aaen 
> pipe
> setup.  It seems to me that with our Aaen pipe setup we have been 
> right
> at 8000 rpm in any case, so the HP on the race track might even be
> closer.  
>  
> I hope that this helps to clear up some issues for many of us.
>  
>  
> http://www.f500.org/rotax/
>  
>  
> Thanks ... Jay Novak
> NovaRace Inc.
>  
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