DynoSim Software

[Anonymous]

Has anyone used this software? I put the information in for a stock 250 and found the hps and trq are not the same as advertised. I get 113hps @ 3500 and 194trq @ 2000. The head parameters are from 79zeph's post "My 200 Flow Project update......".
Using his data for a fully modified head plus 9.5 Comp, a street cam, 500 cfm carb, header and muffler, I came up with 235hps @ 5000 and 276trq @ 4000. The cruise hps and trq are 124hps @ 2500 and 261 trq @ 2500.
What do you think?
Ken

 

[Bort62]

In my experiance, those programs will give you abou a good of an estimation as a few guys in a garage with a few beers.

In other words, hit or miss.

 

[Anonymous]

I use Desktop Dyno whenever I'm putting a new combo together and have found it very helpfull.
With my SBChev buildup I reckon the results were very close in reality to the computer, and it definately saved me from overcamming that engine.
I'm currently using it to put together a Aussie 221cu I6 and apart from having to select a V6 as the base engine, I believe the results its projecting are on par with what I should expect (here's hoping).
The important thing to do with these programs is to put in as much info as possible, try to find the standard flow numbers for the head you are using etc, as I have found if you leave it to the default settings of the program it'll use much better figures than are really possible.
In your case I'd be suggesting this is what the program has done as those figures are very high.

 

[matt1967]

yea, I used it for my 200 Turbo engine. used it along with George at Clay smith to pick the cam, and figure out the numbers. which should be just over 300 HP at the crank, spinning 5k RPM's, given what Dyno 2000 came up with. I'm going to put it on a chassi dyno when it's done, so I'll see how accurate it will be

 

[Anonymous]

I have used it to create a roller cam profile for 393W, that is going in my truck. I get home this weekend, and will have my 250 running. With a stock head, 2bbl carb, header and a little compression added, the 250 should have gained a few peak hps, ~39 @ 4000rpm and 41 lbs trq @ 2000 rpm. All I have to do this weekend is finish putting the create together.
Ken