Quote:
Originally Posted by Phase
so whats the best way to go about creating a smooth and angled up rear diffuser? id need some clearance and something heat resistant to get around that muffler
hypothetically guessing, what would my CD drop down to by removing the side mirrors, adding rear wheel skirts, and smoothing out the underside and having a rear diffuser? no upper spoiler or boat tailing done
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1) First, you need to scout out opportunities for attachment points.
2) The fuel tank needs to be 'fire-walled' away from exhaust heat.
3) Metallic heat shields can be fabricated and attached to the hidden side of belly panels.
4) The exhaust pipe itself wrapped in fiberglass racing wrap.
5) The lower A-arms of the rear suspension may be able to carry their own belly panels.
6) Everything which doesn't 'move' can have a frame structure attached below, from which the skins are secured. This will also define the upsweep of the diffuser section.
7) Aluminum, directly under the muffler would be immune to its heat.
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8) A dual mirror delete would be in the neighborhood of delta Cd 0.0125
9) Rear skirts netted Covington Univ. delta-Cd 0.0063 ( 2.1% ), perhaps an okay working number.
10) The rear belly section with slow diffuser (2.8-degree) was delta-Cd 0.02 ( Audi & FIAT ) if memory serves me.
If so, we're looking @ an est. Cd 0.2012.
If we were millionaires we could actually know.