Head and spring question

[Rollin Coal02]

Im installing a HX40/S400 this week, using stock head gasket and springs, running her light till i can get her in for more parts....BUT here is my question. What do you guys do when running say 70psi of boost. Head studs with the head o-ringed, o ring the head and re torque stock head bolts? and what kind of springs are you guys useing?

 

[J.Keith]

I use 12mm ARP's at 125ft lbs, O-ringed head and at least 3 retorques. Never had one fail yet. Just get the head and block REALLY clean. Springs are a well hashed out subject around here. Maxspool, Hamilton's, F1 Sportsman's....search and read for hours. Rocker studs are very nice also.