Originally Posted by
My ST-RR EVO
Separate issue now. Our track being run dry and blue grooved. My car is traction rolling everywhere. I can't push it at all... unless it's going straight.
I stiffened the shock oil incrementally up to the thickest oil the hobby shop had, 60wt Losi. ...and the smallest hole pistons I had (1.3x8 down to 1.2x8), cut some droop, lowered the car and went to a stiffer front sway bar (2.3mm to 2.5mm) and heavier springs. With these changes the car was massively better, but it's still not enough.
I'm not sure if raising or lowering roll center would help more or if longer links would help. I'm trying to apply the statement of how a 'low roll center is the most chassis roll (least wheel lift potential)' to my new issue, or if it does. Would more chassis roll make the car more likely to roll over? And also start lifting wheels off the ground since the chassis is rolling over?
Think of chassis roll they way we use anti-squat.
Basically, the rolling motion, side to side, or front to back, is energy being absorbed, rather then sending it to the tires.
More anti-squat uses the chassis energy to push on the tires, rather then squatting.
More chassis roll, absorbs the energy the tires would see as chassis roll instead.
Keep in mind though that sometimes traction rolling can't be tuned out. So if tuning to the max doesn't help, you may need to attack the track differently, try different compounds, sauce, etc. to reduce or eliminate the issue.
Hope this helps.