[lemans411]

i have a 535 pontiac with cometics and arp studs. i have had issues with the heads lifting when i get around 20 psi of boost. when i check the studs they are loose... i have retorqued the heads many times and it seems the center stud that runs through the center 2 exhaust ports is always the loosest . followed by the outer bolts that run through the outer exhaust ports.... i guess im trying to figure out if they are just stretching or working their way loose . i torqued them right before the last race i went to and it seemed ok but really how many times do i need to retorque em before they stay? i assume your motor is dry decked? maybe i should o ring it and be done ... id be thrilled if i could get 25- 30 psi out of mine id be running 8's in a 4100lb car weeee!!!!!!!!