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4x4 Fun Buggy Build - Fun Buggy Burnout

It's Not Done, But It's Still Fun
By Fred Williams
Photography by Fred Williams
4X4 Buggy Build Front View Weld
In case you missed it, I'm... 
   
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4X4 Buggy Build Front View Weld
In case you missed it, I'm building a buggy with the guys from Poly Performance. It's taking forever and a day, but that's because we only work on it during free weekends. We also always seem to choose the more difficult designs for each component.
4X4 Buggy Build Sheet Metal Mounts
In last month's issue, the... 
   
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4X4 Buggy Build Sheet Metal Mounts
In last month's issue, the front and rear suspension was pretty much dialed in, but we still needed to mount the shocks. Any normal fabricator would bend a tube and weld on a set of tabs to bolt the shocks onto, but we decided that some trick sheetmetal mounts would be cool. The 0.090-thickness chromoly sheet was used, and it was all TIG-welded to the mild-steel DOM tubing.
4X4 Buggy Build Sheet Metal Bend
Each piece of sheetmetal is... 
   
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4X4 Buggy Build Sheet Metal Bend
Each piece of sheetmetal is first made out of a piece of posterboard and bent to determine the best fit. Then it is cut out with the bandsaw and if need be bent with the press. In order to strengthen the pieces we also cut holes and used the Light Racing flared-hole kit to dimple some of the sheet.
4X4 Buggy Build Triangular Piece
To strengthen the mounts we... 
   
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4X4 Buggy Build Triangular Piece
To strengthen the mounts we added a second triangular piece where the bolt goes through the plate. This helps spread the load and prevent buckling of the material.
4X4 Buggy Build Seat Mounts
With the front shock mounts... 
   
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4X4 Buggy Build Seat Mounts
With the front shock mounts done, we moved rearward and worked on the seat mounts for the Mastercraft suspension seats. First we bent up this plate that covers the Atlas transfer case and 700R4 automatic. Note where we had to clearance the plate around the shift rails and how the outer seat mounts bridge the gap from the boxed substructure and the rock rails.
4X4 Buggy Build Die Grinder
In order to get the centerpiece... 
   
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4X4 Buggy Build Die Grinder
In order to get the centerpiece to attach to the tubes cleanly we needed a curve cut into the sheetmetal. Using a die grinder with a heavy-grit sanding drum, we quickly removed material and left a nice curve that matches the tube.
4X4 Buggy Build Welder
Since we are working with... 
   
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4X4 Buggy Build Welder
Since we are working with both thin mild steel and chromoly material, a lot of the welding is being done with a Miller Synchrowave 200 TIG. This is a great entry-level machine that can also serve well in a full-blown fab shop. Some exciting features are that it is also a stick welder, it has pulse control that helps lay clean strong weld beads, and you can adjust the AC balance to fine tune the weld-cleaning action and penetration on aluminum.
4X4 Buggy Build Tig Weld
Drew Burroughs, who runs Poly... 
   
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4X4 Buggy Build Tig Weld
Drew Burroughs, who runs Poly Performance's fab shop, TIG-welds part of the center seat mount. Notice how his left hand feeds the weld bead more rod while his right hand holds the torch. The Synchrowave comes with an air-cooled Weld-craft torch, but if you are doing production work or welding a lot of thick material, you may want to upgrade to a water-cooled torch that comes with a pump and runs water through the torch handle.
4X4 Buggy Build Welding
The TIG torch is usually controlled... 
   
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4X4 Buggy Build Welding
The TIG torch is usually controlled by a foot pedal, which can be tricky when trying to work up on top or underneath your truck or chassis. Check out this shot where Drew is welding and using his knee to control the foot pedal since he had to squat down under the chassis. As with anything, welding gets easier with practice, and TIG-which necessitates using both hands and one foot or knee-requires a lot of practice to master.
4X4 Buggy Build Ram Assist
Fully hydraulic steering can... 
   
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4X4 Buggy Build Ram Assist
Fully hydraulic steering can be very reliable off road, but when dealing with other unpredictable drivers on the street, a conventional box with ram assist offers what I feel is a larger safety margin. I decided to go with a ram assist from PSC Motorsports up front because I hope to drive the Fun Buggy on the street some day. (Yes, I know that sounds crazy, but I have a plan I'll reveal in a future issue.) The steering box is an Xtreme Duty Jeep CJ box, which in the unlikely event of a failure can be found at any parts yard in East Topeka to keep us moving.

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