Originally Posted by
RedBullFiXX
90% of the setup is tires.
The rest is fine tuning.
With that 5.5t motor, you will need a lot of rear grip to maintain stability under hard acceleration. Both from the track surface, and from the tires.
Diff Action setting.
Locked:
The spur should not slip under acceleration.
To test this, hold both wheels, and try to move the spur with your thumb.
It should be very difficult to move, if at all.
Smooth:
There should be no grinding, or gritty feel when you rotate the wheels, spur stationary.
Free:
The drag from the motor should be enough to keep the spur from moving, while diff action is maintained.
The pod should be perfectly free without side damper or springs installed.
no bind, no drag, just perfectly floating.
Check for side shock-ball ends bound up too.
Those can only snap-on one way, or they will not fit right.
Ok, tightened the diff properly, the car were much better on throttle. Also changed the upper arm mounts from 10 to 5 deg. Still it was extremely edgy and undriveable. The tires seemed balanced. No front push nor slip at back.
Tried to turn down steering balance from 70 to 60 to 50, yet undriveable. Hmm, maybe a slower steering would help?
-St punch from 35 to 0
-St curve from 10 to -20
Finally it seems to be stable, will do some more research on this, but now somewhere near good to go
(I have a KO Helios w/spektrum module, bought used...)
Took of tweak bar & shock, no bind in pod. Also gave sidesprings two turns preload from tweak bar, so I could do a little adjustment. Put coins on front wheel, some adjustments in side springs, and the both drop at same time. Will do the full tweak out later. This site seems like a good tutorial: markpayneblog.blogspot.com/search/label/How%20to%20Tweak%20Out%20a%2012th%20Car
The side balance is not 100% but quite close...
