Transforming a Mardave to a Schumacher Supastox

LRCCC website

Start with a Mardave set up for carpet racing with a single cell LiPo and a 13.5 turn brushless motor - this one happens to have an alloy rear pod and a differential, and VRX front suspension.

Remove all the electrics for use in the Supastox - you need a low profile servo, so this standard size one was left in the Mardave. The Mardave differential rear axle will fit the Supastox if required.

Build your Supastox chassis - seal the edges of the chassis and other fibre parts with super glue prior to assembling. Note the position of the servo - it has been moved 10mm forward to make more space for the speedo, and turned over to help get an even weight balance side to side. Moving the servo forward will change the ackerman setting, but there is so much bump steer with the kit steering set-up that I doubt it will be noticeable. This one has the optional independent front suspension set-up and a differential included. It also has an adjustable top link to the rear pod to enable adjustments to the anti-squat settings if required, the standard side links have been retained as the car will be used for circuit racing not oval racing.

This shows the independent front suspension and revised servo position in more detail. Also shows the space for the personal transponder in front of the servo. Ball races have been fitted to the front wheels. Note the new position for the aerial mount due to the servo being moved forward.

This shows the extended hole in the chassis for the new servo position - it just removes the original hole for the aerial.

This shows the rear suspension and motor position in more detail. Note the use of a motor spacer plate to move the motor slightly to the left of the car, and the differential in the rear axle. This one is using a 70 tooth 48dp gear and has been rebuilt using carbide balls in the diff. Initially the springs have been fitted in the outside position.

This shows the final chassis built up with the electrics all in position, the Hobbywing 1S speedo is quite large so needs the extra space made by using a low profile servo and moving it forward 10mm. Keep the wiring as short and neat as possible. Note the use of a single saddle pack LiPo with a foam spacer, again to help get the weight distribution even from side to side. (Final weight balance was within 5 grams side to side both front and rear and split 42/58 front to rear)

A side view of the built chassis showing the motor spacer, foam battery spacer and radio receiver in position

The final car with bodyshell sprayed by Julian Beckett

Ready to race - hope it goes well!