12-30-2007, 06:04 PM
I ran it back to back with my RB ws7III, the bf.21 felt just as good, with a lot better low end response, it did have a shorter rpm wall on the top end, of course, the ws7III will climb forever, but on a 100' stretch the bf should hang with any of them, the track I will be club racing is medium sized, so it is very ideal for my application.