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My half home made 232 intake :P |
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farna 
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Moderator Lost Dealership Project Joined: Jul/08/2007 Location: United States Status: Offline Points: 7106 |
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 Posted: Apr/15/2012 at 2:50pm |
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You mentioned using sand to make the cores -- that's about as good as it gets with sand. I agree -- a little filing and some filling and you should be good. Might want to get some "lead" body filler. It's really just a soft solder with no lead content any more. Eastwood sells it. That will probably be best for the filler, but I don't see why you can't use a good Bondo. It's an intake, it's not going to get real hot. With Bondo it will have to be painted though. With the "lead" body filler you should be able to leave it natural.
I don't know what you could make the core from that would be smooth. Would be perfect for die casting, but I don't think you want to spend $10K or more to have a steel die made. What about plaster? Would that hold up with molten aluminum??? Edited by farna - Apr/15/2012 at 2:51pm |
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Frank Swygert
American Motors Cars Magazine www.amc-mag.com |
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nali
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Joined: Oct/30/2008 Location: Montreal , Can. Status: Offline Points: 844 |
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Posted: Apr/15/2012 at 5:29pm |
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amchornet1970 : I don t want to use a scoop. It may be nice on a Gremlin, an AMX, but I m really not sure it s ok for an Ambo 66 4 doors :) And I want the car to look like a mild custom. I ll find a way to make it fit. Maybe using other injectors than the TBI. The problem is the carbs are made of zinc, so they can t be welded .
farna: the "cores" are used to leave the holes. They are made with a mix of sand and linseed oil, baked at about 400 for about 1 hour. The mix becomes hard with heat. The rest of the mold is a mix of sand , bentonite clay, and a bit of water. I ve made casting better than this one. The defects are because the molten alu was a bit too hot. So it made moisture bubbles. I knew it, but it was the first time I made a so big part, and wanted to be sure all would be filled. The final part weight 2.3kg :) Maybe I ll cast another one, not as hot. Look at this part, it s 1 1/2 " and even if there s some pitting, it s not so bad. So it can be done.  A plaster mold can t be used for 2 reasons. The first one is when you pour alu, air as to leave the mold to make room. The mix of sand and clay is not "airproof", it s like the little stones in aquarium to provide air and bubbles. The second reason is that plaster always keep humidity. So when you pour molten alu at 660 celsius / 1200 F, the water vaporise, expand and you have a nice bomb, or a volcano. Make your choice :) |
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66 Ambassador 232 Supercharged in project
Olds Delta 88 1979 Buick 38 Coupé . |
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nali
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Joined: Oct/30/2008 Location: Montreal , Can. Status: Offline Points: 844 |
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Posted: Apr/19/2012 at 2:29am |
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66 Ambassador 232 Supercharged in project
Olds Delta 88 1979 Buick 38 Coupé . |
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farna
Supporter of TheAMCForum
Moderator Lost Dealership Project Joined: Jul/08/2007 Location: United States Status: Offline Points: 7106 |
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Posted: Apr/19/2012 at 11:16am |
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Chromed by a shop, chromed at home using a DIY kit, or chrome-like powder coating?
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Frank Swygert
American Motors Cars Magazine www.amc-mag.com |
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nali
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Joined: Oct/30/2008 Location: Montreal , Can. Status: Offline Points: 844 |
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Posted: Apr/19/2012 at 12:25pm |
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Just polished in the basement while watching a movie.
I will powdercoat them clear, I have a Eastwood powdercoat gun. It s less shinny after the coat, but require no maintenance. Or Diamond Clear also from Eastwood. It s nice, but difficult to use, it runs easily. |
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66 Ambassador 232 Supercharged in project
Olds Delta 88 1979 Buick 38 Coupé . |
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nali
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Joined: Oct/30/2008 Location: Montreal , Can. Status: Offline Points: 844 |
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Posted: Apr/25/2012 at 1:42am |
 
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66 Ambassador 232 Supercharged in project
Olds Delta 88 1979 Buick 38 Coupé . |
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Thikstik
AMC Addicted 
Joined: Mar/20/2008 Location: Alabama Status: Offline Points: 1078 |
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Posted: Apr/25/2012 at 5:07am |
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Wow, very very nice!
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75 gremlin x, jeep 4L headed 258,Clifford cam, intake,header. 390 holley. I want a 282 VAM motor!
AC/PS/PDB. 72 AMX , 304 2bbl, 3speed, now disks...probably will sell, want an automatic /AC. |
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Amc Hot Rod
AMC Nut
Joined: Dec/22/2010 Location: Littleton Co Status: Offline Points: 219 |
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Posted: Apr/25/2012 at 10:22pm |
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Thats awsome. I like it.
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1973 Hornet 390 4 speed
1973 Jeep Commando 401 1970 Javelin SST Ram Air 1968 Rambler Rogue |
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nali
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Joined: Oct/30/2008 Location: Montreal , Can. Status: Offline Points: 844 |
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Posted: May/03/2012 at 9:00pm |
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Not sure many Renix intake had so much love :P
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66 Ambassador 232 Supercharged in project
Olds Delta 88 1979 Buick 38 Coupé . |
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4.0 Rambler
AMC Apprentice 
Joined: Nov/26/2007 Location: Illinois Status: Offline Points: 184 |
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Posted: May/03/2012 at 9:15pm |
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This is very cool project!
Edited by 4.0 Rambler - May/03/2012 at 9:16pm |
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1970 AMX
1969 Rambler |
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