Throttle Body to Carburetor Conversion - Page 4 -
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Unread 09-25-2011, 02:25 PM   #46
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1987 YJ Wrangler 
Join Date: Mar 2008
Location: corpus christi, texas
Posts: 6,928
i am googling lost wax process. i have no idea what that is

I don't feel like working on anything, at this time.
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Unread 09-25-2011, 07:10 PM   #47
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1990 CJ7 
Join Date: Nov 2008
Location: Ga
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Originally Posted by superj View Post
i am googling lost wax process. i have no idea what that is
Lost wax is a process where you carve the desired item in wax. Then dip the wax carving in a ceramic solution and let that coating harden on the wax. The ceramic and wax is then fired in a kiln. The wax melts and runs out leaving a perfect mold of the desired part.

The mold is then used to accept the desired molten metal (aluminum, pot-metal, bronze, gold, etc) . After cooling, the ceramic shell is broken and removed from the finished product.
418 miles on 19 gallons of gas. Can't beat the BBD !
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Unread 09-25-2011, 08:12 PM   #48
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1989 YJ Wrangler 
Join Date: Mar 2011
Location: Jacksonville, Florida
Posts: 345
Originally Posted by Old4X
How about just make a casting using the lost wax process? Wax is much easier to carve than a phenolic block.

Seriously, there are trade schools that do this and the cast part normally just needs final fitting and de-flashing.

Yes, the wax would be easy to carve, BUT.... The resulting casting would need more than just flash removal, there is a lot involved in making a correct casting. Material flow, cooling, and shrinkage need to be accounted for. The finished casting would then need to be machined in order to create an adequate seal on the sealing surfaces which makes it much more complicated than using phenolic. Phenolic is very hard, but can be shaped using common woodworking tools and techniques. If you start with the correct thickness of phenolic, the seal surfaces are already nice and smooth ready to seal up tightly. Metal casting is outside the capabilities and tooling of most DIYers.
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Unread 09-26-2011, 02:00 PM   #49
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1987 YJ Wrangler 
Join Date: Oct 2009
Location: Lakeland, FL
Posts: 726
I'm going to suggest that if the wiring and a dead ECM are the only issues you have, you might see what jeep clubs are in your area. Someone in the club might be willing to help you resolve your issues (have beer available) and not have to go through changing to a carb. That said I have nuttered my 4.2 and changed to a Weber carb - runs great. Good luck which ever way you decide to go.
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Unread 11-04-2011, 08:50 PM   #50
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1991 YJ Wrangler 
Join Date: Jul 2011
Location: Wahiawa, HI
Posts: 10
Phase 2

I finally received my intake and got it installed. I have the carb in place. Anybody have any good diagrams of how to run the vacuum hoses? My Chilton's manual doesn't have the best diagrams and photos, and since it was previously fuel injected, I don't really have a reference point from before. Come to think of it, a good picture under your hood may be just as good as a diagram.

Thanks in advance.
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Unread 12-12-2011, 08:21 PM   #51
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1989 YJ Wrangler 
Join Date: Dec 2010
Location: College Station, TX
Posts: 217
TexasTrue - how'd you make your adapter? Phenoic?

Anyone else - Anyone want to make/have an adpater? I don't really have any woodworking friends.
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carb , carb spacer , conversion , efi , throttle body

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