Strangely enough, this post appeared in the XRAY X1 forum, referencing advice from Xray team driver Jan Rathiesky
Originally Posted by
cheapskate.brok
Managed to meet Jan and had a chat with him at the recent TITC held in Bangkok early this year. One advice that he gave was lighter tube damping for high traction tracks and heavier for low traction. The idea behind this was to allow the car react according to available grip, a slower transitioning of weight on low traction tracks does not break the grip threshold.
I'm personally running 30k in the side tubes, 1.2 springs and Tamiya soft at the front, meant for the F104/3. They cost USD2.50 with three ratings, 2 pairs each.
Tamiya F-1 Front Spring Set
Tamiya, F-1 Front Spring Sst ,(50509)
Generally, as traction comes up, you go to lighter springs. Lower traction, heavier, as grip allows.
In super high traction, lighter springs let the car roll within the suspension travel. Stiff springs will make the car act more like a door hinge and want to traction roll when the springs reach their limit of roll. In lower traction, stiffer springs keep the weight from transferring too much and break the tires traction, as referred to above.
All of this is subject to limits, but it's a general guide.
As always, make it easy and look at the setup helper from xray. Most of the info is universal.
http://site.petitrc.com/reglages/xra...6_SetupHelper/