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Formulation of AMC cast iron |
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74Bubblefender
AMC Addicted Charter Member Joined: Jun/29/2007 Location: The AMC form Status: Offline Points: 2589 |
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My theory is that the Nickel was used in 401 blocks only
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We are just about to forge new AMC V8 crankshafts.. please check here
http://www.bulltear.com/forums/showthread.php?19564 |
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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When I worked for Thompson Center / KW Thompson tool we recycled nearly 100%.
The chips and scrap from the manufacturing side also got recycled in the foundry.
The only throw away scrap was the unrecoverable stuff mixed with dirt on the floor.
I am unaware of hot the mix was mantained, but we never had a bad run
that I am aware of. We manufactured firearms so it had to be near perfect.
Boris
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Gremlin Dreams
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WARBED
Supporter of TheAMCForum Joined: Feb/12/2011 Location: Edinburg TX Status: Offline Points: 1677 |
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I've had a lot of machine work done over the years and the first I ever heard about different grades of cast iron is when my machinist mentioned the hardness of the AMC block compared to other blocks. He did mention IH and some 350 Chevys being made the same way. I just recently ridge reamed a Chevy 305 and it cut like butter compared to a AMC. Seams like all manufacturers had there different recipes for casting alloys and like chefs kept them a well guarded secret.
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59 American 2dr S/W. 70 390 AMX. 70 232 javelin. Kelvinator fridge ice cold beer storage.
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Aljav
AMC Addicted Joined: Jul/18/2007 Location: Wisconsin Status: Offline Points: 1037 |
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AMC used Central Foundries which is owned by GM. AMC changed sometime in the 70's to a foundry in Canada. The central foundry casting are said to be much better casting. I believe when said to be "better" its just overall quality. Not sure if formulas changed.
Allan |
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69 AMX 9.86 132 mph 71 JAV/AMX and 69 Javelin, .. NAMDRA member #1106
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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The 390s and 401s I have seen have had excellent
casting quality and little core shift. I can't say that about the 304s and 360s. They have been hit or miss. One 360 I pulled out of a Gremlin (no clue as to the origins) was so severly core shifted I wondered how it ran without breaking up. Obviously the 304 and 360 were bread and butter engines for AMC and Chrysler, the 390 and 401 were flagship motors. I am presently building a 1975 401, again little to no core shift. Any clue as to where it was cast? The 502 head castings are nasty and getting a lot of expensive port work. Boris Badanov
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Gremlin Dreams
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Hurst390
AMC Addicted Joined: Apr/20/2008 Location: secret Status: Online Points: 5752 |
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That's makes sense as to why the later 401 blocks seem to be thinner wall...depending on which way the casting number at the rear faces... |
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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74Bubblefender
AMC Addicted Charter Member Joined: Jun/29/2007 Location: The AMC form Status: Offline Points: 2589 |
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They also used a foundry in Racine. The foundry in Racine did at least all the aluminum castings for them. |
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We are just about to forge new AMC V8 crankshafts.. please check here
http://www.bulltear.com/forums/showthread.php?19564 |
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Buzzman72
AMC Addicted Joined: Sep/15/2009 Location: Southern IN Status: Offline Points: 2713 |
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Chrysler bought AMC in 1987. How many '87 and later 304's were built? What vehicles were they found in? [I don't know of ANY...therefore, 304's built by Chrysler must be EXTREMELY rare.]
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Buzzman72...void where prohibited, your mileage may vary, objects in mirror may be closer than they appear, and alcohol may intensify any side effects.
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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360 was used in Chrysler built Jeeps till 1991 as far as I know.
304? Not sure, but I did lump them into the same statement. Boris Badanov
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Gremlin Dreams
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Aljav
AMC Addicted Joined: Jul/18/2007 Location: Wisconsin Status: Offline Points: 1037 |
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I believe that all Central Foundries had a CF on the block in the Valleys
Even Wally Booth said the CF Blocks were a bit better. He dealt with the Canada Foundry for a few of his last blocks. |
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69 AMX 9.86 132 mph 71 JAV/AMX and 69 Javelin, .. NAMDRA member #1106
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