Ok, I've been boosting for about a day now between 5-8 psi sometimes it spikes to 10 anyway the car runs fine for about 5 mins at normal temp bossting at 6 psi then bam temp gauge goes all the way to red. I checked the coolant its good, overflow tank is good, dosent appear to be any oil in the coolant but i do have a slick liquid coming form my valve cover seat it dosent look like oil it feels like coolant but y would it be coming form the valve cover. anys uggestions? the car just started doing this since boost which has only been a day

 

have you checked your thermostat? is your fan working? what kind of radiator are you using? an efficient way to check a blown head gasked would be to open the radiator and see if you see film or an oil substance. as far as the head, check your seals on where everthe leak is coming from.