Vance,
> No elegant way to save copies of the graphs. I use
> the windows screen capture feature, then trim it in MS paint.
Try snagit at www.snagit.com ... you'll will like it.
Don
"Navarrette, Vance" wrote:
>
> Don:
>
> I have dyno 2000, and I like it quite a bit.
> Let me begin by saying that it *CAN* be pretty accurate,
> but in general it is much better suited to comparing
> different combinations than making predictions.
> I had to tweak the simulation quite a bit to
> get a combination that matched the factory rating on
> the TR6. Once that's done, you can plug in different cams,
> compression, exhaust, etc and watch what happens to the
> power curve.
> Some things it doesn't simulate:
>
> 1. Ignition timing; optimum timing is always assumed
> 2. Fuel mixture; no way to see impact of a rich or lean
> mixture.
>
> Some limitations:
>
> 1. Best results are obtained with seat to seat cam
> timing numbers. Not all manufacturers make
> these available.
> 2. Best results are obtained if you have flow numbers
> for your intake and exhaust ports at 0.050"
> lift increments. How many people have that
> information?
> 3. You must select from a long list of carb/intake
> options. Couldn't find "Dual Side Draft" carbs
> as an option anywhere on the list.
> 4. It's helpful to know how many CFM your carb is rated.
> Couldn't find the CFM stamped on the ol' ZS anywhere.
> Made up a number based on the 1.75" bore.
>
> Within these limitations, I fiddled until I got a
> combination that matched the factory rating within 2
> HP. From there, it was cake to swap cams and exhaust
> systems looking for power. You can also see the impact
> of advancing or retarding cam timing, and using higher
> ratio rockers.
> The other thing that I like about the simulator is that
> it gives you a true sense of how difficult it is to answer
> the question "Which cam is best for my car?" There are sooooo
> many variables that affect the outcome, and you appreciate
> that fact after playing with this simulator for a while.
> The user interface is very simple, and it has never
> crashed or misbehaved.
>
> General comments:
>
> No elegant way to save copies of the graphs. I use
> the windows screen capture feature, then trim it in MS paint.
> It doesn't come with a good selection of cam tables, although
> you can purchase a set of cam tables that have specs on
> just about every cam ever made. It is no big deal to enter and
> save the specs by hand, but it would be nice to have catalogs
> available from a pull down menu.
> There is a feature where you can ask the simulator
> to optimize your engine for peak power, torque, etc within
> a certain range of parameters. The closest thing you'll ever
> have to a cam guru. This feature is computationally intensive,
> and on my 1GHz PIII computer had to run overnight to evaluate
> one combination. Takes a while to plow through several combos
> you would like to optimize and then compare.
> All of these issues may have been fixed by now. My copy
> is over 2 years old at this point, so take it all with a grain
> of salt.
>
> Ciao,
>
> Vance
>
> ------------------------------
> 1974 Mimosa Yellow Triumph TR6
> Cogito Ergo Zoom
> (I think, therefore I go fast)
>
>
> -----Original Message-----
> From: Don Malling [mailto:dmallin@attglobal.net]
> Sent: Wednesday, January 15, 2003 6:52 PM
> To: 6-Pack
> Subject: Dyno2000
>
> Any opinions out there on Dyno2000?
>
> http://www.motionsoftware.com/dyno2000prodpage.htm
>
> Don Malling
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