Q&A Forum
@dmitry-maday, no that difference is too high. Something else is causing it. Do two back to back measurements and see if you get the same (very similar) results. Make sure the engine, drivetrain, tires etc are warm first.
Guys,
Here is version 3.2.135.
I added an option for physically linked brakes under Basic Dyno settings. Turning this option on will ensure the rear and front are getting the same MOI calculated. If the rear and front tires are not perfectly the same size, air pressures are different, etc and the brakes are linked, then one loadcell will read differently from the other, causing the program to believe the MOIs are different. This is avoided with this option.
I also fixed an MOI wizard issue with 4WD dynos when only using front or rear.
Enjoy!
Does the linked brakes setting only effect the MOI calc and nothing else? I tried the MOI wizard on a 4wd car with a centre diff and it gave dramtically different MOI for front and rear, even though RPM was the same on each.
Does the linked brakes setting only effect the MOI calc and nothing else? I tried the MOI wizard on a 4wd car with a centre diff and it gave dramtically different MOI for front and rear, even though RPM was the same on each.
Yesterday I made three measurements in a row. MOI was 10.44. After the first measurement, MOI vocals were +1.65. After the second measurement, MOI showed +0.37. After the third measurement, MOI showed -1.25. I did not correct MOI. MOI remained at 10.44.
Hi,
i'm trying to update to the software from the beta release, and it keeps interrupting setup before the end.
windows 10 pro
@matteozanusso is there an error message or any more info you can give?
@dmitry-maday, maybe the brake is too low in the second run, so the difference between the two runs is too small. Can you send me the saved config file and all the MOI logs then I can take a look (jostein@yourdyno.com)
Guys,
An update to the way the option "The brakes are physically linked" is handled.
This option gives two effects:
1) In this mode the dyno will calculate one total MOI, not individual front/rear MOI (naturally, since everything is spinning in a locked mode), and will assign the same MOI to all brakes (total MOI/number of brakes).
2) You can keep the MOI setting for each roller/hub/brake no matter if you run 4WD, rear only or fronts only. Earlier you needed to change MOI based on whether the 4WD dyno was in 4WD mode or RWD/FWD, this is now much simpler.
Download here: https://yourdyno.com/ YourDynoInstaller_3.2.136.exe
Cheers
@admin “the setup ended prematurely due to an error” … or something similar.
the only option is to exit the setup, then Yourdyno can be started as before. Last time I lost all settings…
Hi
I like the focus on the enertia calculation👍
May i ask if there is a function to implent the loss from brake fan/static losses on the way?
@matteozanusso, send the exact error message to me at jostein@yourdyno.com if it happens again. Exit YourDyno before upgrading.
Hi
I like the focus on the enertia calculation👍
May i ask if there is a function to implent the loss from brake fan/static losses on the way?
Can you explain this a bit more? I want to understand what this means to know if it's something I will have to watch out for once my dyno is up and running.
Hi.
The issue is that the losses in a eddy current brake fan isnt linear. It increases quite alot when the brake is at higher rpm
Its no problem when the losses is measured during coast down. In that way the increasing loss is captured and calculated in the engine hp graph.
If you want to measure the wheel hp it will give you problems because the loss isnt linear. In that way the reading will be quite different depending on brake rpm
Hope its understandable
im not an expert 🙂