i used 80 ft lbs on the standard oem head stud. cool... nothin happen at 1.5 bar booting.
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NEEDED: ARP head stud nut torques!
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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.
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This is what happens to aluminum at 80, pic is not mine.
http://www.miataturbo.net/engine-per...e-miata-54746/
Just some reference info.
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