Hello Everyone!

I use this program called Virtual Dyno for a lot of my data reading. It takes datalogs you record using durametric, or other datalogging software such as UMW's or Cobb's, and makes a "Virtual" dyno run.

The runs look like this:



And here is my current turbos (TiAL HTA 3073) overlayed with my stock k24's at 1.35 bar running meth.




It's a very fun and interesting tool for seeing what theoretical power your car is making. I've found it to be extremely accurate (within 10-15% of my real dyno runs).

I really want to see what numbers other are making, so I decided to make a guide to get you guys rolling!


Step 1: Install

- Virtual Dyno isn't made for Porsches, but it can be configured to read our datalogs with a little tweaking.

- You can get Virtual Dyno on their website here: http://www.virtualdyno.net/ Just click the big "Download Now" button in the top right, and the download will start.

- Find the downloaded executeable and go through the installation. If you have trouble opening the software, make sure you have the latest .net framework from microsoft. (Windows update should give this to you if you haven't updated in a long time... Shame on you!).

- Once you open the software, the windows should be blank, and look like this:





Step 2: Configure Settings

- Navigate to File -> Options. These are the main settings for what the dyno graph will look like, and what units are used on the axis'

- There are a lot of settings to fiddle with in Virtual Dyno, but heres how I have mine set up:

Graph Tab:





Dyno Tab:





Columns And Profiles Tab:

- This tab is very important. This is the name of the columns in your datalogs that stores specific data. As you can see, mine are already set-up for names of durametric data values. If you don't know what your data columns are called, open your datalog and check.

- You can Check the "AFR" Box and "Boost" box to have virtual dyno graph those below the main graph.





Step 3: Adding A Car in the Car editor

- Virtual dyno uses pre-set car data to save specs on cars. This data is used in the Program's algorithm for determineing horepower/torque. If the vehicle is heavier and drags more, it would produce bigger numbers than a light/aerodynamic car moving the same speed.

- Navigate to File -> Car Editor. This opens the custom car editor.

- On the left, you can see there are a lot of preset cars. Unfortuneatly there are no porsches. We have to add our own specs into a new custom car. Fill the boxes up with your car's specs. I found a lot of this data online. Googleing things like "996 Turbo Gear Ratios" does a good job at getting us our results.

- For the tire diameter, you can use an online tire size calculator. Don't guess on this one. Your numbers will be WAY off. Mine is set to the size of my 315/30/18 rear tires.

- Once all the data is input, click the "Save as Custom" button. Find a location for the custom profile, that wont change. If you move the file, the program will forget your car.





Step 4: Add a new Profile

- A profile is using the car data in conjuntion with other variables. To put it short, its another weird feature they added for no reason. But we need one anyways.

- Go to Profile -> Add profile.

- You'll see the small "New Profile" window open. At the top, click the black text (Or just leave it) to rename the profile. Select the car preset we just created from the dropdown menu. Since its a custom profile, it will be under the "Custom" category. Enter any remaining data such as Occ. Weight (Occupant's weight). No need to select a gear. We do this once we upload a run.

- Click the Save Profile Button.



- In the bottom right hand corner of Virtual Dyno, click the "No Profile Selected" Text, and then click on the new profile you created.


Step 5: Getting Datalogs Ready for upload

- We're close, but theres one more thing we need to do before we can upload our data. We need to make sure our data is in the right format. Virtual Dyno won't take data in any format other than (.CSV). If your datalog isn't .CSV, you need to use a program like Word, or Open office to convert it.

- Another important thing is your data being trimmed. If your log is mostly driving data, you can get weird results. I usually trim the data down to JUST the pull from start to finish. This makes EVERYTHING a lot cleaner and neater.


Step 6: Uploading Our Run!


- Now that we have everything configured, we can load our run. Naviate to File -> Load Runs.

- Find your .CSV datalog, wherever it is on your computer.





- Open the file up, and you should see the data appear in Virtual Dyno.





- If you get an error saying something along the lines of missing data, you've done the configuration wrong. You need to go back to File -> Options, and make sure the data values are named/input correctly!




Step 7: Refining the data.

- If your data looks weird, or your numbers are inflated majorly, you may have some things wrong.

- In the log area on the left under "Opened Runes", make sure the correct gear is selected. Selecting 4th gear for a 3rd gear log will cause crazy numbers. Don't we all wish our 4th pulled like our 3rd!?

- Another issue can be data cropping. You can use the sliders at the bottom of the open runs to crop the data based off of RPM. If you have a huge spike at the start or end of the data, cropping it off can give much better results.

- Last but not least is smoothing. In the top right, you can choose what level of smoothing the graph undergoes. Level 0 is raw data, which is shown as crazy mountians and peaks. Smoothing 1 and 2 are the most accurate. If your data looks weird, you can switch to smoothing 0 and see if theres a single point of data much higher or lower than the rest. This is a bad run which has wheelspin or some other interfearing variable.


Step 8: Publishing data.

- To save a graph for posing on the forms (Post in this thread!!!), you can right click the dyno graph and go to "Graph To File". This will make a .jpg of the graph for posting!





Step 9: Brag to fellow forum members about your crazy runs. No downhill guys! Thats 80whp!! Haha...


I hope you guys enjoyed my guide. I didn't cover all the features, such as re-scaling the graph and such. You need to play around to really see all the stuff it can do!

I would really appreciate if anyone whos doing this would post their results, to turn this into a virtualdyno data/graph thread!


Cheers,

Taboopc

 

Thats pretty cool!

 

Come on BHT! Lets see your graph

If you shoot me a datalog I'll graph it for you too.

 

It has to be a datalog? Not a vbox file?

 

Has to be some sort of log that has atleast RPM and Time.

I also need to know the gear ratio of the gear in the pull, as well as the tire size.

 

OK. I'll send you a log.

 

Cool... I do the same thing using the vbox charts but it is a LOT of work and needs quite a few runs to get an accurate reading

 

Doh.... I didn't convert to csv... very good program though

Is 20 sqft right for 996 Turbos as well as GT2 for the front area ?


Oh ooooooooo this shows my car making a lot more torque than I measured myself... no wonder the engine was gone haywire. This is a run on May 1 when I had a minor boost leak and was down on measured power so my winter runs must have been near that 700+ ft-lbs of torque area on weeny K24s on E70 fuel







January 2015 in 35F temps

fixed for Mustang dyno

 

This is neat - I'll give it a shot.

 

Sick how great this program is... you can also log and chart all of the TPS, knock per cylinder etc

Here is my Jan 2015 run where thr torque got way up there showing some knock etc

 

Wolf- you should use the "Mustang Dyno" in options when you post graphs.

Everyone should use "Mustang Dyno" so we can all get a similar scale.

Your graph is exactly why I have my engine tuned a little differently. I have the torque flat in the midrange by tapering the boost upwards.

 

I will change the pics above when I work out how to change dynos

 

No need to change the above pics mate, just for future reference.

You can find the Dyno settings in File -> Options, and then the "Dyno" tab.

 

yeah got it... charts above in Mustang dyno format

Thx

 

I tried to configure it before but no luck, so congrats! good job!

Loaded 3 runs with 2 different tunes and results were

0.8bar 405whp virtualdyno; 520hp crank dyno Superflow 800
1.8bar 725whp virtualdyno; 830hp dyno; supeflow800; lower timing tune
2+bar 704whp !!!! vdyno; 916hp superflow800; higher timing tune

the last setting was used to break 4s 60-130mph


I guess because of the MAP sensor limitation the vdyno can not show real hp for higher boost than 1.55bar unfortunately... this should be the case for Todd's car too, I would be curious to see, but I am quite sure the result will be lowered a lot as the app thinks we run only 1.55bar tops

I will try later to add manually the correct boost into the csv file and see how the results will change