The torque curve per gear is so cool to see... Back in the days I did record my car's engine accelerating on a flat street (and I did it both ways) and then used a fast Fourier transform to find the engine RPM from the recorded sound.
I then plotted that torque curve (it requires knowing how many cylinders, gear ration, wheel size and a few other things and there are a few approximation [like tires deforming with speed, loss, ...] but it's doable) and, sure enough, the resulting curve was very close to the one given in the car's official book.
Yup, back in the eighties car manufacturers (at least some of them) would give you a book with the gear ration and torque curve nicely plotted.
IIRC you only need to record the acceleration over one speed (say the 2nd gear) and then with the gear ratio you can plot all the gears.
It was my first Java app with a GUI! I probably still have the code somewhere on obscure backups.
PaulKeeble · 39m ago
A lot of the games are currently getting throttle mapping to RPM wrong. In Assetto Corsa if you put 20% into the throttle in neutral the RPMs will climb to red line and the throttle position just determines how quickly that happens and its because they aren't doing this correctly.
herpdyderp · 21m ago
Niels Heusinkveld on YouTube has great videos about this!
I then plotted that torque curve (it requires knowing how many cylinders, gear ration, wheel size and a few other things and there are a few approximation [like tires deforming with speed, loss, ...] but it's doable) and, sure enough, the resulting curve was very close to the one given in the car's official book.
Yup, back in the eighties car manufacturers (at least some of them) would give you a book with the gear ration and torque curve nicely plotted.
IIRC you only need to record the acceleration over one speed (say the 2nd gear) and then with the gear ratio you can plot all the gears.
It was my first Java app with a GUI! I probably still have the code somewhere on obscure backups.