On top of the info provided I'd also look into tire pressures and the proper compound for the track conditions.
There is a list on there form for each tire compound and it's optimal range.
http://forum.projectcarsgame.com/showthread.php?57541-Project-CARS-2-Tyre-Pressures
The cold tire phase in PC2 is slightly over done when it comes to understeers/oversteer/grip.
But in ways semi realistic.. from my RL Karting experience I usually struggle with understeer followed by corner exit oversteer through high speed corners for the first few laps until the tires heat up.
2-3 laps in PC2 usually gets them up to temp and on par with other titles....ffb is subjective.
I find to get the best experience out of pc2 it really depends on using the right compound/psi combo and being able to maintain that optimal range during an entire stint.....the dynamic track/weather also effects the temps throughout a lap.