[Nonfractal]

Yes 
it's possible to have too much grip 
But
That doesn't normally result in the car tipping over.
Understeer (car just fails to make the corner) is the symptom of too much grip.

You are not suffering from too much grip, just "car setup" woes

Chris's suggestions above are all worth pursuing. 

Also:
Get the chassis down to 1mm off the track. High ground clearance can trigger roll-deslots
Ensure your front axle has minimal vertical movement.
AlanW

https://www.slotforum.com/threads/causes...st-1809354