25 - 30 minutes maybe? It all depends on how you drive though, so it can be as little as 10 to 15 minutes, but as high as 45 minutes...
For the same price though, you can get the MMM ESC with a Feigao motor... which will run more efficiently and be more powerful. Just something for you too consider. If you go the Novak route though, go with the 5.5 or 6.5 system. The 4.5 system will run way too hot...
Welcome to the forum by the way.