Algodoo

what about reverse?

If i had time, there would be a reverse gear

I read 102 HP @ 400 RPM and brake after 450 RPM, how did you measure 530 HP??
It seemed weird that the engine braked above 450 RPM so I made a manual reading and got 85 HP @ 600 RPM. Try manually / use my dyno

The scene is good though.

Also, you can make the scripts much simpler and less laggy by using keys.isDown("key"). For example, if you want to make the throttle work with the "up" key, you can use keys.isDown to detect that you are pressing the key, and e.other.angVel to detect the velocity of the ignition circle (which has the same speed as the crankshaft). so go to the spawn script and write

density := (keys.isDown("up") ? 1000:(e.other.angVel < -10? 0:1))

And you're done. Zero scene.my variables used in the throttle