Curious, any of you guys using desktop dyno? I used to have the "2000" version, and while I found it to be somewhat useful in N/A combinations, it seemed to suck for forced induction stuff. I did find it a fun tool to play with though. I see their newer stuff claims to be more advanced as far as forced induction. Anyone?

From guys I work with it seams GT power is the program used for engine design

I use Dyno-Sim 5, while I have little faith in the numbers, it does give you an idea of how things will be affected by cam changes. That being said, I have put the specs in for the last 2 motors and Dyno-Sim was very close.

I use dddyno and dynosim5. I also have a "real" dyno. I've done a lot of builds that I would dyno, then build in dddyno and tweak until I got correct results. I now have a database of real combinations and results. I also built most stock combos in dddyno. Now when I do a software build or modification I have a good baseline to start with and results have proven to be very accurate, except dddyno is always too high on low end torque. But above 4000 RPM you can get it really close to actuals. The cam section of dynosim 5 is very useful.

Bob Lloyd
Full Throttle Marine

Dynosim5 has a lot better supercharger section than dddyno. However it's really difficult to get all the variables correct. Again, what I've done is take actual data, then tweak the supercharger parameters in dynosim5 to mirror the actual dyno numbers. Then you can make changes and get reasonably accurate results..

Bob

Cool, im gonna get the Dynosim5 and play with it

When you get it, if you'd like to give me a shout I can get you some baseline files to play with.