the fact that the R35 runs a twin-clutch manual makes it capable of being even faster than it should be at the track given how much it weighs (that, and the very well thought out weight distribution)
any circuit (or even drag) racing that involves lots of gearchanging sees the 35 saving crucial tenths over a manual every time you change gears. not much per change, yes- but over multiple corners, and say- multiple laps- for an enduro, it really starts to add up in a major way. shame it takes away a pleasant layer of interaction that any enthusiast enjoys while driving (ie- changing your own gears at a direct mechanical level, with the ability to skip from say, 5th to 2nd in one motion if you want, rather than sequentially). it's not all about how fast you can maul a racetrack
as for power, well- how much do you want to spend? I'm sure the VR38 is capable of some fairly startling amounts of power given enough re-engineering (even more than the wildest RB's to date), but the cost would be off the planet. every serious upgrade for the 35 is big-ticket, and probably will be for a fair while yet