Re: Retorque Heads
It seems to depend mostly on the quality of the fasteners. I tend to use ARP studs/washers/nuts in my performance builds - and they don't tend to stretch much, so they hold the initial torque reading quite well. The readings can definitely be influenced by the usage of a good stud assembly lube (or not) - which really helps with accurate readings and consistent clamping forces.
Also, the head gaskets can influence this as well - as there are quite a few different types of construction. So - it is certainly possible that your torque readings have held up.
I've found with some of the "new studs and hardware" suppliers (non ARP), that the grades of the materials are such that multiple re-torques are usually necessary. This is just an observation of mine . . . nothing scientific about it.
|