Has anyone raced the Duratrax Evader St nitro, any what modifications should I do to make it a perform better.

Nothing. I race an two evader's Nitro and Electric. Which came straight out of the box and onto the track.

My advice to all novices is to back off before the corners. I know that when you crash your mates think it's funny but smooth lines win races.

For a little extra horsepower you can loosen your exhaust manifold from the head. This really makes the standard DTX 18 hammer.

I run mine like this and regually win races.

Try this and see how you go.