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105005 Posts in 12267 Topics by 4728 Members
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61  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: January 08, 2013, 06:25:08 AM
#2 mold line at Tonawanda cast small blocks - they could have (and were at times) shipped to Flint for solid lifter application.  All cylinder iron (both plants) was the same spec.   We did some really unusual alloying for some siamese bore race blocks.  Special alloying just wasn't done in production though - too hard to keep track of with 2,500 tons of iron being poured per day.
62  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: January 07, 2013, 02:37:55 PM
At Tonawanda we never alloyed production castings with nickel.
63  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: January 07, 2013, 07:16:25 AM
It would take a lot of typing to fully answer the metallurgical control question.  Suffice it to say that the primary alloying & adjusting elements were Carbon, Silicon, Manganese, and chrome.  "Base" iron was melted and the alloy composition was adjusted in the hot metal cranes as they were filled from the holding furnaces (in front of the cupolas).  Further adjustments were made at the individual molding lines.  There were only two basic types of iron.  Blocks & drums required a higher chrome for wear and/or tensile (class 30 iron).  Carbon, silicon, and chrome were further adjusted at the mold lines (as the metal was poured into the pouring ladles) for additional strength, and casting feeding requirements.  Gray iron producers were cupola melters back then, so Manganese was used to "tie up" excess sulfur in the iron.  Foundry metallurgy was essentially controlled/analyzed by eutectometers (carbon & silicon analysis via cooling curve) and chill samlpes (carbide tendency).  The full lab with spectrometer, Leco, wet lab, and mechanical testing was located at the forge (next door to the foundry) - connected via pneumatic transport tube.  Believe me - that's the "cliffs notes" version!
64  Camaro Research Group Discussion / General Discussion / Re: building a garage on: January 02, 2013, 06:55:04 PM
Lancaster, PA area - best to contact me through email.
65  Camaro Research Group Discussion / General Discussion / Re: building a garage on: January 02, 2013, 07:15:09 AM
Any members who want to stop by are always welcome.  I love to talk to "car guys" & the refrigerator always has a a few beers in it!  Cars in this building are:  3  copo Camaros (one Yenko), Plum Crazy Hemi Challenger, 427/400 Corvette,  MIV AC Cobra (in SAAC registry), Z11 bb Pace Car, & Mustang GT convertible (daughter's first car).
66  Camaro Research Group Discussion / General Discussion / Re: building a garage on: January 01, 2013, 05:22:41 PM
Can't you see the "Coors Light" on the refrigerator door?  Under the Ford sign.
67  Camaro Research Group Discussion / General Discussion / Re: building a garage on: January 01, 2013, 09:37:42 AM
more

68  Camaro Research Group Discussion / General Discussion / Re: building a garage on: January 01, 2013, 09:36:00 AM
Wow - looking at all of the great ideas - I wish that I had waited to build my building!  A few somewhat uniqe features of mine - Clean Burn waste oil boiler that heats the building through hot water coils in the concrete floor.  Clean Burn unit & compressor & media blast cabinet are located in a seperate mechanical building.  Work bay has a work pit that is also heated with floor coils & ventillated.  Upstairs is an apartment for guests, missionaries, etc.

69  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: January 01, 2013, 09:14:35 AM
Great pic JohnZ!  That RR track went right by the front of the foundry and continued on (switched) over to the Chevrolet Forge.  All 3 plants were on the same property.  The G&A plant was across town.  Switch yard was across the street from the 3 plants.  We lost more then one ZL1 over in that switch yard!
70  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: December 28, 2012, 04:53:51 AM
"Their casting operation may have been efficient but the rest of Chevrolet was a mess. De Lorean devoted much of his 1974 book to the train wreck he took over in 1969. He turned it around; many people believe he was one of the best auto execs ever."
   I actually got to meet John De Lorean at the St. Louis Assembly Plant.  Real visionary, extreemly smart & personable - even took time to show us around the new company plane that he flew in on.  He dressed completely in white that day - looked like the man from Glad!  His ego finally got the best of him - IMO.   
71  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: December 25, 2012, 04:09:05 PM
Typical repairs were cosmetic welds on the valve cover rail for heads and on the intake rail on blocks - they often accumulated in finishing.  Sometimes hand stamping of castings that were missing a part number or date digit.  Also grinding of excess iron that would prevent castngs from going through auto grind equipment.  Scaling of cosmetic mold penitration - stuff like that.
72  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: December 25, 2012, 02:25:53 PM
The duration of Christmas shutdown varied with the casting demand.  The foundry was pretty maintenance intensive, so we tried to schedule a week shutdown in melt/mold to accommodate big projects.  The finishing/inspection area would generally work a limited crew through shutdown to catch up on casting repairs & rough casting backlog.  Also, personnel would be available to ship castings out of inventory to the motor plant.  Ugh - that's a real flashback - digging pallets of blocks out of snow/ice!  Under normal production though - the castings flowed pretty quickly to the motor plant (which is the topic of this thread).
73  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: December 25, 2012, 12:14:22 PM
Yep - the plants were on "rock & roll" back then.  We were pouring 2500 tons per day at Tonawanda MCP.
74  Camaro Research Group Discussion / General Discussion / Re: BLOCK CAST DATE VS PAD STAMP DATE on: December 25, 2012, 06:46:22 AM
The best time possible at Tonawanda = 30 minutes on the pouring loop to shake out on lines 1 & 2 (block lines) + 4 hours in the cooling court + 20 minutes through blast, grind, chip & inspect.  The door to the Tonawanda Motor Plant was only about a 50 foot fork truck ride from the end of both block finishing lines.  Sometimes the blocks were pretty warm when they arrived at the motor plant.  At that point, the block could go right to the motor plant machining line.  So...it's clearly possible for a casting to be produced and assembled the same day.  We weren't "just in time" in those days though.  Most casting waited on pallets in inventory que.  If a block fell off of the conveyor in the cooling court it would sit up there until Christmas or Summer shut down.  So a casting date could be many months before build date.  The Flint motors would be pretty difficult to be cast & machined the same day due to the trucking required between Saginaw & Flint.
75  Camaro Research Group Discussion / General Discussion / Re: Z10 on Ebay on: December 24, 2012, 09:42:13 AM
Curious - did April Camaros with factory stereo get the early style kick panels?  Maybe, due to low volume, GM didn't change the kick panels with factory speaker provision to the new style?
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