Hi our T4'20 Stock racers,

I have done a lot of testing with stock motor on ETS carpet in the Hudy Arena lately to have some good starting set-ups for high-traction tracks.
Attached is my set-up sheet which works really well and is also very easy to drive.


I want to give some extra feedback for better understanding.

I like to use the bushing in the top deck, as it makes the car very stable and allows me to push a lot. In Modified class, I prefer to use the bearing as it gives more steering. I really like the shocks lowered to the bottom holes on both the front & rear shock towers, as it gives better cornering speed and also makes the car more stable in chicanes. I tested the graphite brace on the steering and I like it a lot, as it makes the car steer very smoothly with the same amount of steering. So if you drive in high-traction conditions and you feel the car is stopping a bit… use the graphite brace. I raised the rear arms by 0.5 which makes the car much easier to drive over chicanes, too. I like to use PSS in the front as it makes the car smoother and more stable in long sweepers. On the motor mount, I did not use the screws in front of and behind the layshaft, as it makes the car more stable and generates more traction. But be careful with this setting since the motor mount flexes more which makes the spur gear more susceptible to breakage in crashes.

I have used 8K oil in the diff. It is very important to use the correct quantity of the oil. For this set-up I have used 1.6g of oil. It always use HUDY Air vac to remove all the air from the diff oil. It is also very important to refresh the diff after approximately two races. Even when the oil is not leaking from the diff, the freshly built diff makes a big difference in car's handling as the car is more stable and has more steering.

Also do not be afraid also to test and to use harder diff oil. The new T4’20 generates more traction than the previous version and also has more steering so harder differential oil will help you to increase cornering speed and stability of the car in high traction conditions.

Tire preparation is very important, and I sauced the front & rear tires with HUDY red additive about 8 minutes before the start of the race. When traction increased, to make the car more stable after the start – mainly for the finals – I increased the additive timing to 10 minutes for the rear and keeping the front at 8 minutes. When the rear tires are sauced for longer, the car has slightly less steering but it is also more stable and does not tend to oversteer which makes the car easier to drive mainly in chicanes.

The choice of body is also very important. In my opinion, the Twister body from Extreme Racing is the best body for most the traction conditions at this moment. Many drivers say that the body looks exactly the same as Dogsbollox, but on the track you can feel the difference. The Twister has same amount of steering as Dogsbollox but is more stable and easier to drive through chicanes. The standard Twister wing works really well, but when the traction is high and track has many 180 deg. hairpin corners, I prefer to use the Hellcat wing as it free ups the rear of the car.

Source:

M. Hudy