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Post by Captain Awesome on Dec 17, 2012 21:20:48 GMT -8
I hope you're using ARMA STEEL cranks. ;D
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Post by sc397 on Dec 18, 2012 5:17:12 GMT -8
Palease... stop me from posting anything up over there. Boy, did I get told by the experts. I guess the only thing to do is throw away the forged and cast cranks I have and just use Armaspheal. The guy that offset grinds our cranks had this to say about Armaspheal " Psfftt". He also said that the AMC 360 cranks are the best cast iron cranks that he has turned. He is the the guy who told me what I want to hear so, I am going to listen to him ; )
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Post by Captain Awesome on Dec 18, 2012 7:13:22 GMT -8
I wondered how "junk" Cast AMC cranks were. A buddy ran for 2 - 3 seasons on a stock used cast 350 crank in a 12:1 355 hitting a 100 shot of nitrous to the tune of 10.40s racing twice a week. He knew he had well over 400 passes on it on the juice. An AMC should do better than that since it's "vastly superior."
So how fast and how much are these guys gonna race to have to worry about forged cranks? I just love how many forged cranks are sitting in car shows. What a waste.
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Post by fast401 on Dec 18, 2012 7:32:07 GMT -8
I'll pick up the cranks from ya Rick.
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Post by 69Rebel on Dec 18, 2012 9:22:33 GMT -8
I hope you're using ARMA STEEL cranks. ;D You mean nodular cast iron? Same shit every other cast crank ever poured in the US is made of? Fuuuuck.
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Post by Captain Awesome on Dec 18, 2012 11:58:12 GMT -8
I hope you're using ARMA STEEL cranks. ;D You mean nodular cast iron? Same shit every other cast crank ever poured in the US is made of? Fuuuuck. You better brush up on your gAyMC, before you start talking crap like that, buddy.
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Post by 69Rebel on Dec 19, 2012 9:49:47 GMT -8
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Post by tsanchez on Dec 20, 2012 9:05:14 GMT -8
Found this on Armasteel
Many years ago, the General Motors (GM) metalcasting division developed an alloy known as Armasteel for use in differential parts, engine crankshafts, automatic transmission stator stator: see generator; motor, electric. shafts, connecting rods and other components.
Armasteel served the automaker well in many critical areas. In the GM Corvair, for example, it was used for differential ring gear carrier/cover assemblies. The material also was used for the crankshaft in the high performance 421-cu.-in. Pontiac engine and the connecting rods in the lightweight Buick/ Oldsmobile V-8 engines of the 60s.
However, confusion about the nature of this material has recently emerged in the casting community. Much of this results from GM's marketing efforts to apply a certain mystique to standard engineering materials. First, Armasteel is not steel but a GM trade name for a grade of pearlitic malleable cast iron. As a 1982 GM brochure explains, it is a ferrous alloy with temper carbon in a matrix of tempered pearlitepearl·ite n. 1. A mixture of ferrite and cementite forming distinct layers or bands in slowly cooled carbon steels.
2. Variant of perlite.
Noun 1. ..... Click the link for more information. or tempered martensite mar·ten·site n. A solid solution of iron and up to one percent of carbon, the chief constituent of hardened carbon tool steels.
[After Adolf Martens (1850-1914), German metallurgist. . It was produced at the GM Central Foundry Saginaw Malleable Iron plant (SMI (1) (Storage Management Initiative) The initiative developed by the SNIA in 2003 to create a single standard interface for storage management technologies used by multiple vendors and networking communities. ), which was closed in mid-2007.
A brief history of the plant was given in the article "A History of Innovation" in the Jan. 2001 issue of MODERN CASTING. According to the article, "SMI was one of the first to develop a melting technique in which cupola iron was transported to electric arc furnaces and 'duplexed,' or treated for metallurgical control and held until it was needed at the molding lines. SMI also developed and introduced pearlitic malleable iron (known as Armasteel) in 1936, which was used extensively for military applications during World War Two and the Korean War and also for the conversion of crankshafts and connecting rods from steel forgings to cast components in the 1950s."
As heat treatment technology was refined and moved from coal fired batch ovens to continuous gas or electric atmosphere controlled ovens, so did the manufacturing approach and available grades of Armasteel. The resulting four Armasteel grades listed in the GM brochure were referenced by hardness and strength ranges.
The addition of heat to steam of reduced pressure after the steam has given up some of its energy by expansion through the high-pressure stages of a turbine. followed by an oil quench and temper (tempered martensite).
The confusion over Armasteel also arises from malleable iron becoming less popular over the years. As ductile (nodular) cast iron started to gain acceptance as an engineering material, much of the former malleable iron work (malleable dates back to about 1900, while ductile was invented in 1948) was converted to ductile cast iron. Malleable iron is more difficult to cast and requires the lengthy heat treatment operation to create the temper carbon. Ductile iron can be made directly from magnesium as an alloy treatment addition to the base iron. In addition, most of these Armasteel grades now can be made as-cast with alloying additions of copper or manganese to the base metal.
If you are looking for a replacement alloy for Armasteel, look no further than standard ferrous materials. Any malleable cast iron produced with proper controls will be similar, if not identical, to Armasteel. Ductile iron equivalents also are available for all four grades of the alloy.
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Post by spud on Dec 21, 2012 12:50:02 GMT -8
thats all unsubstantiated bullshit unless billd or a certified 100% gay gaymcer tells me otherwise. I must request you refrain from quoting actual facts it's bad for the hobby! FUCK! DAMMIT! SHIT! DANCURTIS!
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Post by sc397 on Dec 21, 2012 18:52:55 GMT -8
58 JCJeep401: Wow what a crazy cam! There is a distributor gear right in the middle of it and it is about 6" longer than a stock one. The lobes are all spaced funky too. Typical, I have to modify everything to make it work right. WTF, do I have to grind my own dam cams now!? Wut, it is a cam for a six banger? Oh, guess I will send it back to Scummit.. Strokers: Man, I need to build these expensive toys in to engines and get them out the door! Got a plan in my head for javtwotone's 390 replacement mill...yep, gonna build a 397 cubic inch 360 with that pos NON-Armaspheal cast iron crank. Stay tuned..
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Post by sc397 on Dec 22, 2012 19:32:33 GMT -8
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Post by javtwotone on Dec 23, 2012 8:46:37 GMT -8
On that stroker, where do the extra 14 ci come from? bore, stroke, both?
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Post by sc397 on Dec 23, 2012 9:28:27 GMT -8
Ahhhh, at least SOMEONE is paying attention. 4.155" bore 3.66" stroke using NASCAR rods and 1.850" journals.
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Post by sc397 on Jan 13, 2013 18:52:26 GMT -8
Progress: 8. 390/401 Jeep Guy: Block is preped, cam bearings installed 53. dcheek45: Plumbing done by javtwotone, mandril machined by Stickshifter. I guess I had better get at thiose heads. 54. NEJoe's390#2: At the machine shop. 55. MySC/360...360. At the machine shop. 56. team5050... 426 stroker street engine. Crank is done. 57. javtwotone 383 stroker: Crank sent back to the machine shop... He forgot to widen the journals. All is good, he will fix it. 58. JCJeep401: All machined and ready to assemble. Need a cam. 60. 67RogueXCode: 343 block, 360 crank: Needs assembled 62. 401_1974_Javelin_: Solid lifter 401. Short block machined. Need heads. 63. JTruck383: Pistons in house crank is at the machine shop. Need to prep a block 64. BC390: 68 390 street engine. At the machine shop. 66. NEJoe's390#3: At the machine shop. 10: MY MACHINE engine: Installed the intake tonight. Offenhauser Power Baby! (Or, lack there of) 67. MN401: Pistons in house 68. Rick's429. This will be fun. I have a .060" over 401 block that needs to go bigger to clean it up. I have a 390 crank stroked to 3.785". I also have a small pile of go-fast parts. I think this should propell the Wet Hornet quite nicely : )
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Post by javtwotone on Jan 14, 2013 16:07:23 GMT -8
Will be interesting to see how the cheek motor looks with the "budget" chrome brackets
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