100mph HPI Vorza
;is 2010 build wasn’t originally destined for 100mph; all we
wanted to do was see how fast we could go with an HPI Vorza
Flux RTR buggy and o;-the-shelf parts, which was expected
to be about 85mph. ;e stock speed control allowed for
6S power, but a 2650Kv motor replaced the 2200Kv stocker.
Gearing was upped, the drivetrain was reinforced, and the di;s
tuned for even power distribution. ;e Vorza had more power
than traction but easily topped 86mph, with more speed on
tap. Why not shoot for 100mph? With the addition of Imex
foam tires to prevent tire ballooning, the ballistic buggy did the
ton on the El Mirage lakebed—complete with moon discs on
the wheels, like a proper lakester.
;ere’s a lot of tire spinning torque in that motor, and that
was used to turn the drivetrain, with a very large 24-tooth
Mod 1 pinion gear. ;is gear was used to get the highest
gear ratio possible without having to modify the chassis.
A big 2650Kv brushless motor was used to get the
buggy up to speed. ;ere’s a lot of cooling, thanks to
the machining that was done to the can to increase
its surface area. ;e motor mount was modified
slightly to make the drivetrain as smooth as possible.
Normally 1/8-scale buggies sit about an inch o ; the ground, but when you’re trying to reach speeds of
100mph, you want to get it as low as possible to make it more aerodynamic.
Foam tires with 0.040-inch-thick aluminum caps were
eventually used to get the buggy up to 100mph. ;e caps help
reduce turbulence and drag around the wheels, which made
the buggy go faster.
SPEED BUILT FOR