I experienced as well how the D812 oversteers. I did some tweaks on the buggy by using D8T hex wheels on the rear of the D812 to add rear track-width to increase rear grip at corner entry as well as high-speed on-throttle steering. Here are some other changes I've made:
FRONT:
shock oil: 40 losi
Rebound: 25%
upper shock tower: #3
lower shock tower: #2
Suspension arm shock position: #2
Sway Bar: 2.2 mm
REAR:
shock oil: 27.5 losi
Rebound: 25%
upper shock tower: #2
lower shock tower: #1
Suspension arm shock position: #2
Sway Bar: 2.5 mm
DIFF OILS (used Mugen brand):
F: 5000 C: 3000 R: 2000
The rest of the set ups are on Ty's set up sheet on Dirt Nitro.
Since then, I was able to run the D812 harder than before.
I ran this setup at revelation raceway last Saturday for Summer series with great result
