F-Zero like racing game advice needed

How do you think the physics are programmed in F-Zero? This is what I have so far:
https://dl.dropboxusercontent.com/u/277813713/Web.html

When you strafe and turn into the strafe you pick up speed. I don’t know what do about that.

Also turning too quickly slows you right down, how do I conserve momentum on turns?
I had “take momentum from side and add to forward” but that caused problems with strafing, were strafing would speed you up

The physics of F-Zero on the super Famicom (or Super Nintendo) and on N64 were not implemented as in a standard physics module like Unity’s one. Japaneses are known for favouring gameplay / manoeuvrability over realism. So chances are that to mimic F-Zero physics, you will have to move away from certain aspects of standard physics.

You will find some people that seem to share the same interest as you in this thread:How in the world were the physics in F-zero X done? - Unity Engine - Unity Discussions