Do this in quick bursts as to test whether the slipper slips or the diff. Test roll the car backwards on the rear tires only down your legs towards your knees while holding the spur.Tighten the rear diff as a function of the required slipper setting if a tight slipper is required.I would describe the rear as "loose to medium" and the front as "medium". In general, with my latest setups where I have been seriously loosening the rear end up with a higher RC and hubs moved back, I run the rear diff a little tighter, and the front tighter than the rear.With the higher rear roll center, and hubs moved back, tighten the front a bit to help tame rotation and steering feel.The best way I can describe this is having the rear as loose as you would ever run a 2wd if you ran stock buggy, and the front even looser. Traditionally, the front should be looser than the rear. Both diffs should be tight enough that they "do something", but not much more than that.With traditional setups, run the diffs loose in general.This is a platform weakness in my opinion. The rear of the car should be redesigned IMHO to place the rear further in the camber gain curve at ride height and in a better rear roll center starting point.I have since went to higher roll centers via the use of FR and RR shimming, as well as additional washers on alu hubs, and low mount ball at the inside link.When I went from a 1.2 to a 1.3 sway bar, the rear became MORE stuck, which is a definite indication that it was rolling too much and steering came from the rear end washing out (rolling over).The rear of this car car lacks camber gain in general and the rear roll center is very low in "standard configurations".With my newer "much higher" rear roll centers, I doubt the reaction will be the same any longer.Basically, the more droop the rear end has, the more hooked up it is on power and the less the car wants to turn.A change from 26mm back to 25.5mm rear shock length provided a noticeable increase in on-power steering.With the original "two low" rear roll centers.
Rear droop greatly affects on power steering and rear traction in general.Removing front droop makes the car have noticeably less on power traction-more so than I was expecting for even a 1mm change.The car is noticeably more forgiving with more front droop and tends to get upset far easier with less front droop when landing "whipped" or when over driven in general.
What it may provide in stability in high speed situations, it returns in the form of less steering in slow off power situations. Be very careful when removing droop from the front.Front droop greatly affects low speed steering, forgiveness, and rear traction.I am very happy with this setup and will be leaving it alone to expose it to various levels of traction and track conditions to see how it fares. The return to the 1.2 sway resolved this. The front diff tightening tamed rotation, but the car was still loose when unloading from a high speed corner. I then worked backwards on changes until I determined that a simple tightening of the front diff a bit paired with a return to the 1.2 sway bar felt best. After going all the way back on hubs, 3mm under the hub ball stud, a low mount with no washers on the inside, a 1.3 sway, RF 3 notch shim, RR 2 notch shim, I got the car to finally become too loose in the rear.
The direction I have taken was to continue raising the rear roll center with washers and RF and RR shims (increase notches), moving the hubs back, and trying stiffer sway bars. The "long car" can be pushed so much harder without the track punishing you. The reason for this is my dislike of the -2mm front/rear arm modification, which affects stability on our bumpy track significantly. Lately I have been on a mission to dramatically reduce rear traction, of which I seem to have previously had an endless supply, to add rotation and steering ability. This means the car must be able to handle the bumps well, while being able to rotate freely and get on power quickly. Kyosho ZX5FS2SP - Wayne Schroeder - Fastlane Raceway - Blue Spring -Īt fastlane, the track can get quite bumpy in some places, while being very smooth in others.
0 kommentar(er)
