[jhautz]

30 minutes will be tough, but with the right setup you might get there on 6000mah.

I run 5s 5000mah on a 1515/2.5D and get around 20minutes exactly in my truggy. For a 20 minute race I would probably want to run 6000mah just to be sure. On 6s and geared conservatively you just might make 30 on 6000. 30 minutes of race onditions is a tough one on a truggy. It becomes an issue of weight with a pack that will comfortably give that.

I might consider an even lower kv motor to try and maximize the run time. The 1515/2.5D is a beast on 6s and you said it was a low traction track so having that much power on tap might actually be a disadvantage and a lower kv will help with the run time.

EDIT: Dont get me wrong... It'll still smoke any nitro out there power wise. I had a 1512/2.5D on 5s in my Revo at one point last year and in a flat out drag race in high traction short grass against a truggy with a Modified Novarossi 528 I ran dead heat after dead heat with him. And that was the fastest nitro truggy I had ever seen. So any 1515 will have more power than that.