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Old 01-21-2016, 04:58 PM   #25 (permalink)
BGTV8
A True Z Fanatic
 
Join Date: Dec 2009
Location: 03350 Australia
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Drives: 09 Nissan 370Z M6
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Diffuser needs a curve, not flat-plane. You are trying to replicate the top surface of an aircraft wing. You "need" outside fences aligned fore/aft with the longitudinal centreline of the vehicle - just inboard of the tyres, so that "wash" around the inside of the tyre does not create turbulence in the diffuser

Would probably help to install maybe 3 or 4 more strakes to channel air as well.

I'll post a photo of mine to make this verbiage clearer.
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