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Blog - GT40

These are some work in progress images of a few different GT40 projects.

GT40 headers and megaphones

GT40 427FE Header Scan

3D scanning a Ford 427 FE engine and GT40 header

First up, headers, megaphones, and an engine were 3D scanned for reference in CAD. This is an early scan we did with an older scanner on stainless tubes.

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3D routing the tubes in Solidworks

Using the 3D scan as a reference the header tubes were drawn up to keep as close as possible to the original design. The original had some issues which were corrected in CAD. They were also optimized for equal lengths and for 1D CLR CNC bending where possible.

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Designing weld fixtures

Weld fixtures were designed with keep away areas to accurately position and weld the components together consistently. An engine mock fixture was made to assist in fabrication and back purging while welding. The bright green collector reference plate bolts both to the 427FE engine and the mock engine fixture to hold the runners in their correct positions.

3D printed test runner upturn3D printed GT40 test upturn

3D printed test parts

In the tight areas we 3D printed the upturn runners to verify fitment and clearance to the chassis. These 3D printed upturns also help verify the chassis notches are in the correct positions for future builds. Once all of the tight areas were confirmed, parts and fixture files were sent to manufacturing.

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Weld fixtures arrived

Weld fixtures were assembled and verified with existing parts. The long fixture is the collector / megaphone. The large image is the engine mock with the 8 tubes positioner.

Tubing arrived

Bending these requires about 4 inches between bends. Many of the tight or compound bends will need to be cut and welded.

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