Hi everybody,
the video of this post is mine and the savage was Serum Bashing Savage that I bought from him! :027:
In effect in the video that you have seen there was audio leg but it's really a savge with novak 4.5 system and 4s lipo, not gearign shift, it has only one gear.
The interruption sound you hear is not shifting gear, it is the novak cut-off that interrupts lipo tension when too much volts are required.
you can get the same but good video here:
http://adicesare.altervista.org/video/
Now I run with a feigao 9XL (about 1850 RPM) and Mamba Max and I think the savage go best, the max velocity (about 55 km/h) is about the same with 9XL and Novak 4.5 but 9XL has more torque.
Moreover, I think the novak HV4.5 didn't run to 4800 RPM cause its less torque.
Much different in running time too.
Novak 4.5 is a 4 turn motor (if I don't remember bad) and it burn more ampere, while 9XL has a very good running time.
Now I'm waiting for mamba monster max, so I can go to 6s to have more volts = more torque, more velocity and more running time.