
THE EXPERTS SPEAK
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SBDT: There is more than one possible reason for this, but in general, the lower speed
handling is controlled by the springs, sway bars, and the higher speed handling is domi-
nated by the aerodynamics. In this case, stiffen the rear springs or antiroll bars to ad-
dress the low-speed understeer, and increase the rear wing to combat the high-speed
oversteer.
What are the different Aero adjustments and their effects on the car?
HR: You can work with the wing in the back and a smaller or wider rear diffuser. In the
front you can adjust the inner wing in the bumper.
CB: Ride height, Rake (difference between front and rear ride height), Wing setting, and
size of gurney.
Low ride height = more downforce.
Higher rake - downforce balance moves to the front.
More rear wing - more rear downfore, more drag--> less top speed
Bigger gurney - more rear downforce, more drag--> less top speed.
SBDT:
Front Splitter - Adds front downforce. Basically there are only two
splitters. One is for high-speed Monza (low drag / less downforce) and the other is for
everywhere else. The splitter isn’t used to fine tune the aerodynamic balance but rather
sets the basic approach to the aerodynamic setup. High-speed = 1. Normal = 2.
Rear wing
- Fine tune your aero balance. There are 12 wing adjustments. With a front
splitter setting of (1) use wing settings of 4-7. For a front splitter setting of (2) use wing
settings of 9-12.
Ride height - These control the underbody downforce, which is considerable on the GT
cars and a lot less on the NGT’s. The ride height and the “pitch” or “rake” of the car
(difference between the front and rear ride height) control the amount of downforce. In
general, you want the ride height as low as possible, plus a slight forward pitch for maxi
-
mum effect. To achieve this on-track usually requires the rear ride height to be 20-25mm
higher than the front when setting it in the garage. The NGT’s can get away with 15mm
difference. Having a “pitch up” condition will cause the car to lose a lot of the underbody
downforce, so avoid this. Additionally, if the car comes down and touches the track, the
air underneath will “stall” and you’ll abruptly loose all underbody downforce!