HPI Honda NSX-R GT - Calculating its top speed!

I don't have a speedgun, so i resorted to mathematics. It's much more fun calculating the speed like this.
I think i came very close.
One day i'll do the same with my HPI RS4 two-wheel drive Saleen, which has an HPI Nitrostar .15.

Specs:
Car: 1st Generation HPI RS4 Nitro (1995 or 1996).
Engine: O.S. Max .15 CV-X
Exhaust: HPI tuned pipe.
Alloy parts: HPI and GPM.
Drive belts: Tough Racing kevlar reinforced.
Bodyshell: Tamiya (Honda Mobil 1 NSX -R JGTC).
Weight: 1,700 kg.
HPI Carbon fiber shock towers and upper chassis.
HPI 2-speed.
Tamiya alloy servo mounts.
Graupner fuel filter (1650.1)
Home-made polycarbonate underbody with integrated rear diffuser.
Home-made belt tensioner.

Check out my playlists:
https://www.youtube.com/playlist?list=PL0D2ABC5C14CD2C24
https://www.youtube.com/playlist?list=PL45032921D2611053
https://www.youtube.com/playlist?list=PL53D62C8B90F31012
https://www.youtube.com/playlist?list=PLebvXCCd0CFTCrcyKvnciK_lvUtJQ8bgc

Link to my Pinterest page: https://nl.pinterest.com/sparrowracing/
Enjoy and please rate and/or comment!
Please contact me if you want to use this video or parts of it!