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NEEDED: ARP head stud nut torques!

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    #16
    i used 80 ft lbs on the standard oem head stud. cool... nothin happen at 1.5 bar booting.

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      #17
      Just to chime in... it is highly not recommended to crank 80 ft lbs to an aluminum head.

      I did mine to 60 ft lbs using the factory steel washers (have more footprint than the ARPs/ wider), so far no problems under full boost.

      ****

      This is what happens to aluminum at 80, pic is not mine.

      Click image for larger version

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      http://www.miataturbo.net/engine-per...e-miata-54746/

      Just some reference info.

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        #18
        Nice pic. I think everyone should use what ARP recommends; 60 ft/lbs with their lube and clean threads.

        Edit: Just looked at the first page, 60 is for the mains, 65 for the head studs.
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