Thanks for the info!

 

a very basic question, but the definition is missing

is torque given for crank or wheels?
power is marked as WHP so it is at wheels
but what about torque?

 

Both values are derived from time vs RPM in your log file, So both are measured in actual full mass of the vehicle, which would be wheel horsepower and wheel torque. Hope that helps.

 

Just to be clear.


It is the torque at the wheels, but converted to engine rpms. So it is numerically lower by the drive ratio (gear ratio and final drive ratio).


The actual torque at the wheels is higher by the drive ratio.


Put another way, drive train losses have been allowed for, but torque and power are only consistent if engine rpm is used to connect them.


Confusing?

 

thanks for both answers
i think i get the point regarding torque at the wheels converted to engine RPM

drive train losses are not measured in any way by virtual dyno, so i would be strange if engine power or torque would be reported

the reason I am raising this question is the torque value I am getting from my e9
it should be something like 550 Nm at the crank, and virtual dyno shows 450 Nm (smoothing 5), while the power is reported at 310 WHP (still too high but by 5%)
the road is not perfect (smoothing 0 shows it), but is seems that peak boost of 30 PSI inflates the figures

 

As long as the pulls are being done on a flat road and not down hill you should trust the numbers the program is telling you. Also be careful not to overpower your setup either if its still a stock internal engine.

You shouldn't really need to use no more then smoothing 2-3. and from smoothing 2-3 to max smoothing there shouldn't be more then a 10-12whp difference.

 

after several runs at 2 different boost settings I can confirm this
lower boost gave the same numbers as MAHA dyno (reckognized dyno in Europe),
but the atm pressure and temp corrections were necessary

30 PSI of peak boost falling to 20 PSI at 7,X RPMs is the limit, and so are the numbers for power and torque at the crank: 400HP/550Nm, this is the typical setup for "oem" engines here

 

Hi,

Just tried to install VD from the website version 1.3.5 .. setup installs but when i double click the icon

a window appears saying " VD has stopped working " windows is checking the compatibility.. Window disappears.

I am using Macbook pro with windows 8..

Any one knows whats happening ?

 

It is an issue with Windows 8 it seems. I had it working at the beginning, then a few updates came through and it won't work anymore.

 

I hope some one finds a solution about this problem.

 

You could try right clicking the desktop icon, going to properties, then compatibility mode tab and trying a different windows version. I am still on windows 7 myself, So i wont be much help other then that.

 

Anyone found a solution to make VD work on windows 8.1 ?

 

I just opened VD to see if it worked for me (on 8.1 as well), because I didn't remember having any issues with it. I was at version 1.3.2, and upon starting it it updated to 1.3.8 and seems to be fine. I'm guessing you're also trying the most recent version?

 

Hi Eric,

Yes i am downloading the latest version . Doesnt work no matter what .

 

Can anyone share VD 1.3.2 setup or any version earlier than 1.3.8 ?