[Patrick]

I've used my 1515 2.5D on 6s a bit for bashing. It can do ~45mph for a fair while (haven't used a full pack in one go, probably ~15 mins) without really needing to worry about temps, and around 50 if you gear up a bit. That was fast enough for where I've been driving, so I haven't geared up any more, but I'd be surprised if it couldn't do 60mph for a few speed runs, since temps and take off were still good.