One thing you'll notice about the pro version of the ZD Racing EX16 is that it has these beautiful small scale aluminium oil filled shocks, they look amazing. Sadly whoever assembles the ZD racing cars has led them down badly because the suspension is set up poorly from the factory. It can however easily be fixed and I'll show you just how to do that in this guide
This is the third of a 3 part series of tuning guides for the ZD Racing EX16. The others can be found here:
I'll address 3 suspension fixes in this article: Filling the shocks with oil, suspension geometry and droop screws. Read on!
Correcting the oil level in the shocks
As I said in the into, the shocks on this car are beautiful, especially at this scale. It is an absolute tragedy then they they put barely any oil in them!
These shocks came with a ridiculously low oil level that provided no dampening. With this corrected as per above the dampening is much better meaning the car should have better traction expecially over imperfections on the road surface during cornering. A much needed improvement that hopefully ZD racing improves on. Check the dampening now below:
Adjust the geometry
I'm not going to get stuck into suspension geometry here - the topic is vast. What I have shown below is an option to improve the travel and performance of the rear (IMO)
Adjust the droop screws
Droop screws provide an adjustable stop point for suspension extension and in doing so provide a reliable ground clearance. I'm really please that this car not only has that provision but even includes the grub screws, they just need adjusting. For a strictly road car I like to set a ride height where the drive shafts are roughly parallel with the ground, maybe a touch lower.
Test the balance by lifting the car off the ground with battery out. Place the front wheels down then gently lower the rear and check if both wheels touch the ground at the same time. If not see which wheel is too low by eye and adjust to suit. You can see above my left rear is touching the ground before the right - the droop screw on the rear left needs tightening a little.
You can obviously make these measurements more sophisticated but this should be fine for this type of car.
Suspension is set up poorly from the factory and so making these changes yields a significant improvement in handling. Once you have the basics done as shown here, you can then adjust to suit you own needs.
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