@Gent
I downloaded the scene myself, and I also had a problem with the car when I started the sim I don't know what makes this happen, but just as Bronie said reloading the scim helped for me.
@Bronie
Thanks for reviewing my car, I will try to fix these issues today and edit this scene, I would like if you would have another look then.
Not to disagree with you sheepborg, but you don't see this type of cars often that will go this fast with only a spring engine, bounce engine whatever. So it's worth showcasing. There is lots of junk in algobox and this is not one of them so it's worth rating. Disagree?