Box2d very sepcific setting requirment

I’m creating a simple IOS toy and I’m planning on using box2d because I’ve used it before and the collision detection / reflection is really optimized. Anyhow, for my purposes I really don’t need real physics and especially don’t want any damping. The purpose of the toy is musical in nature, so timing is important. Basically a ball interacts with polys. The polys are static shapes and are just there for the ball to bounce off of. Think pinball, but for music creation, so the ball cannot ever lose velocity because that would alter tempo.

I haven’t found a simple solution with changing any or the parameters for set phsyics. Anyone know what maybe I need to adjust to get my desired result or any helpful suggestion?