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Ollies930's Avatar
 
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Engine case alloy

Does anybody know what alloy the 930 engine cases were cast from and what heat treating they received?
I do not know if there was a change over the years, but I am looking for info on early 3.3 cases (1978).

Old 10-11-2016, 12:41 PM
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I believe they're aluminum.
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81 Pacific Blue 930 Euro coupe slicktop on a strict diet, Rarlyl8 headers, Blowzilla turbo, Tial waste gate, Full bay I/C, Home made center out exhaust, Leask WUR, MSD 6AL, PLX wideband
Wevo shifter, LSD. Next up, Cams, Heads and port work
Old 10-11-2016, 12:47 PM
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What he's asking is which alloy and heat treat of aluminum. IE t-6, 5053, 6061,2024, etc. It seems in my opinion to behave like t-6 but honestly not sure.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
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Old 10-11-2016, 02:22 PM
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The alloy would most likely be A356, heat treated to either T5 or T6 condition.


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Old 10-11-2016, 02:55 PM
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Ah, makes sense now. Clearly I'm not the one to be answering that or any metallurgy questions.
Back to my corner I go.
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81 Pacific Blue 930 Euro coupe slicktop on a strict diet, Rarlyl8 headers, Blowzilla turbo, Tial waste gate, Full bay I/C, Home made center out exhaust, Leask WUR, MSD 6AL, PLX wideband
Wevo shifter, LSD. Next up, Cams, Heads and port work
Old 10-11-2016, 06:18 PM
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Quote:
Originally Posted by pkabush View Post
Back to my corner I go.
You'd better get back out there and earn my money, 70'sbush, before I have to slap-a-ho'!!!
Old 10-11-2016, 08:01 PM
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If you do any fab work and plan on getting the parts anodized after it's important to know which rod to use with which material if you dont the part and the weld will be different colors.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
2019 Silverado 6.2L
Old 10-12-2016, 05:10 AM
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Just trying to find out what the shear strength of the case material is, so I can figure out what the max torque would be for head studs, before the threads pull out of the case.

Old 10-14-2016, 06:52 PM
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