I know, there is the app of a dynometer but I think we need a dyno. Like this: There are 3 versions. The dyno for front-wheel drive, all-wheel drive and rear wheel drive. It would be interesting if there is an update that will have this or someone make it.
Use the search feauture at the top right of the page to see if your topic has been talked about before. Dyno has been requested a few times and the dev showed some screenshots of an WIP dyno in the developer section an while ago. It has a few issues and bugs that they have been trying to solve and so far we haven't heard anything new about it for an while. It's uncertain if we are going to get it for a while or not as the game has bigger priorities.
Hopefully the dyno will see the light of day at some point.. that's one of the biggest props that I wish that could be in beam right now.