Ok so i know its been like 3 months and I haven't been able to play since but based on watching other people's mistakes, I come to the conclusion that downshifting is the problem. I only have paddle shifters so maybe it is too rough on the downshifts or too many downshifts in too little time. I will have to try something out next week.
These cars can make 300 Km/h and have only 6 gears, jump from gear to gear, especially in the lower ones, is pretty big. You can't downshift like crazy, like you do in modern F1 mods for example. If you do, the rear axle will lock and spin is the only outcome. Wait for RPM to decrease enough, and you can downshift safely.
Or you can increase differential settings. P. S. Those who don't use all pedals and Hshifter are missing out lots of fun.
Well that is what you do when engine braking is too hard, you cancel it by some application of throttle. Braking in straight line as much as possible helps too. With cars like this, I like to skip gears when downshifting. Just blip is not enough. You have to use every tool in the disposal if engine brake is too interfering. The blip, waiting of rpm to drop low enough, straighten braking path, brake bias, downforce increase/balance, dampers and suspension to control pitch, hardening front, softening rear rebound damping, differential preload and coast lock increase, wheel alignment. Engine braking has always fascinated me. As much as I know it is possible to control amount of vacuum that causes engine braking. I wonder when it is only that much what engineer can do to battle engine braking torque, and why. Also very interested if by some chance engine braking could be used to some degree as braking power addition, although it obviously makes driving fast more demanding, and more challenging for a driver. In my personal opinion it is best when there is just a tiny bit of locking at the rear when braking, besides adding some braking power it often also helps to rotate the car a bit more in the curves.
@mantasisg the engine helping you take the corner with that extra torque oversteer is one of the best feelings I can have driving.