MACE
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What grade is that aluminium?
Think it'll hold up to fastener torque + vibration without losing tension?
Looks the part either way
6061-T6 grade of aluminum. 7075-T6 would have been better but is not really needed.
Heaps of alloy girdles around with no problems, even ones from factory with good reason, primarily to dampen any instantaneous shock loads that take place. Lancing the peaks off these loads eliminates, or significantly reduces the likelihood of any cracks forming within the block assembly itself, in addition to reducing the caps from moving also.
Sure aluminium has a lower yield point then a high carbon or chromium steel, however it’s not going to be it’s mode of failure, defection under load will given the lower young’s modulus of elasticity.
However with the material, thickness coupled with the fact that the girdle is not only supported by the main studs, but also the full parameter of the sump mounting face, we’d have to pushing some impossible power figures or something catastrophic would have happened.
Only one way to find out I guess if the choice was the right one
Some additional, interesting reading on the topic for people interested in it
Hold.V8 6061 T6 Alloy Main Stud Girdle
Main stud girdle material specs? (source??) - PerformanceForums
Bit like thatI would have been happy with 300rwkw out of a V6. this guy went to town and is now the envy of every holden v6 lover. now when someone says ad 2 cylinders, we can say why would you slow it down
Steve speaking of your great handy work. couldn'tnt get that plenum off to fit the inlet manifold gasket. so i took it to my mechanic and he was amazed at your work. he stood and looked at this gasket for 3 minutes very impressed.
Keep us posted with how you go with that spacer. If you need it machined down happy to help as mentioned in a PM
Cheers,
Steve
