overheating
 

i havea 95 civic hatch and built an ls vtec with si b16 pistions. at first it was all motor then i aquired a revhard turbo kit that i installed 4 months ago. i know my compression is high even at 6.5 psi but it ran fine till 2 weeks ago. i can drive all day and even play slightly in the boost, but under full boost it runs hot afterwards and blows some water out of the overflow only under alot of boost. i thought the stat was sticking, but it wasnt, changed radiators and used continous fans to no avail. could the boost be forcing through the multilayered gasket, but the gasket not failing under normal driving? theres no coolant loss after 200 miles with no boost, PLEASE HELP!