Ok so here's the problem.. It's an 03 cobra with kenne bell pushing 17psi. The car doesn't over heat and it runs great and doesn't blow coolant out of the resevoir cap under normal driving. But when I get on it hard and go from say 2nd to the 4th hard under full boost coolant sprays my windshield and it's coming from the coolant resevoir cap it's just pushing right through it. It's getting very annoying. I already replaced thermostat, coolant resevoir tank and a new cap and burped the system. And today I just had a compression and leak down test done and everything was fine so it's not my head gaskets. So I'm wondering could I possibly be lifting a head? And if so wouldn't the compression and leak down test been bad if I am lifting a head? I need help please because this is getting highly annoying