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Old 02-24-2011, 11:11 AM   #2 (permalink)
fjasper
Bookworm
 
Join Date: Apr 2010
Location: Kalispell
Posts: 127

Sylvio 2 - '04 Audi allroad quattro Biturbo 6-spd
90 day: 25.09 mpg (US)

Atlas - '04 Audi allroad 2.7T 6MT
90 day: 25.09 mpg (US)
Thanks: 7
Thanked 29 Times in 21 Posts
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I'll put up a picture or two once I get my post count up. It has a very nice lower engine cover complete with NACA ducts to direct air to specific components, but it (they, actually, there are two) only covers the first third of the belly. There are some vestigial deflectors that look like they could be enlarged to smooth airflow around the front tires.

Audi did a lot of work managing the airflow on the front of the car. It has baffles controlling airflow through the radiator and intercoolers and covers over the engine to hold in heat after it's shut off. Grill block seems like an obvious first step, but I want to find a way to monitor the temperature of the turbos so I can tell if they get significantly warmer. Pyrometer?

The fender flares (and wheels, for that matter) look like they were specially designed to create drag, so I'll have to figure out what to do about them. I think the back ones might make a good place to start a boat-tail taper.

One question I have is this: Would it likely be helpful to direct cooling air so that it exits through the front wheel wells? It's easy to make the air from the intercoolers exit from the front of the front wheel openings.
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