It's easy to think you can buy power, but the reality is that driving skill is the true differentiator in pan car classes. You just cannot mask bad driving with a fat wallet!
At the GT Nationals you can see just about every combination of motor and speedo in the top 20. On any given day if one driver finds the sweet spot of their car and the track, they will beat any other car that isn't on the sweet spot.
For mere mortals there is more speed to be found from a good LiPo and good driving than almost any speedo/motor combo. Get a good timing/gearing set-up from a good driver using your motor and speedo, slap it onto the car and see what happens.
The Hobbywing speedos seem to have an edge on throttle feel and acceleration - at the top end they are all the same. As I like to say, the HW speedos 'blink' faster than others!
Nothing will substitute for a good LiPo. I have been through four 'cheap' VapexTech cells, three of which go like the clappers and one of which is noticeably slower. The good ones are excellent, but after about ten runs the bad one just dropped out. Given to a club racer they would never know the difference - racing against the best it is a clear half-lap slower over six minutes.
I agree with Stu, that combo is as good as any. As Stu found out, giving them a good LiPo to feed off is the key to a car that "is seriously quick." In the end, almost any combo in the hands of Mark Stiles or Adam Catchpole-Walker will make us mere mortals look slow - just learn to drive fast if you want to go fast!
