A rear diffuser is not effective without a rear spoiler, and the SCCA limits the size of the spoiler in EMod to 10" high at the center, and it can't overhang the bodywork. I took some measurements and ordered some bent .125 aluminum from Tailor-Made manufacturing.
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| I started off with some poster paper and spent so long cutting, fitting, cutting and fitting that I could hardly stand up straight afterwards. |
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| Once I was satisfied with my template, I transfered it to the piece of aluminum and cut it out with the plasma cutter. There was still a lot of fitting, grinding, cutting and fitting with the aluminum to get it sitting right. |
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| Here it is before being fastened on properly |
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| The end plates act as a support and keep the spoiler at a 55 degree angle. Why 55 degrees? Well, I Googled a lot of spoiler angles for autocross and 45-55 degrees were typical. |
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I have to remove the bolts on the side to open the hatch but the only thing under there is the rear shock and sway bar adjustments.
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| It turns out that my spoiler endplates exceeded the 100 square inches that the rules allow, so I trimmed them back. |
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| Since I could no longer use the end plates to fasten the spoiler in place, I made these adjustable rods to hold it at the angle I want. |
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