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S4/A4 B5 Aerodynamics. Can anyone point me to a website

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Old 08-26-2004, 11:14 PM
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Default S4/A4 B5 Aerodynamics. Can anyone point me to a website

where I can find aero drag (Cd), lift and frontal area on 2000-02 S4 sedans and 2002 RS4 Avants?

Please post the website addy here.... I am especially interested in lift figures.
Old 08-26-2004, 11:24 PM
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Search the forum here. S4 cd .32-.31 with frontal area of 2.03 m^2. RS4 .34 frontal area of 2.04 m^2
Old 08-26-2004, 11:38 PM
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DYO, dont confuse him with that mumbojumbo!
Old 08-26-2004, 11:41 PM
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Default You lost me Sir. Bob at stratmosphere? BuffaloNogaro hater?...........

My favorite "tuner" quote, now deleted:
"If you had purchased our kit you car would still be a nice 2002 S4 instead of a big pile of blue garbage." Bob@strat. describing BuffaloNogaro's car. - Mini Midget S4mig.
Old 08-26-2004, 11:54 PM
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Default Thank you! I experienced severe lift ....

at Bonneville Speedweek last week, on wet salt, resuting in wheelspin @ 172+mph and haven't been able to get any answers from AoA/AudiSport as of yet. I had an indicated speed much higher through the entire flying mile, and need to sort out a solution that will keep me in the production class.

Any idea where I might find front/rear lift figures?
Old 08-26-2004, 11:54 PM
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Thanks so much!
Old 08-26-2004, 11:58 PM
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Try searching here some more maybe.
Old 08-27-2004, 03:22 AM
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Default Do you have the bottom shroud on or off for your setup?

A few years back I was goofing off with mine after an oil change and thought I noticed front end float well into the triple digits(nothing like you hit though). The next time I did this it seemed much better with the shroud on, but it was fairly new at the time and had an aftermarket suspension(placebo maybe?).
Old 08-27-2004, 05:13 AM
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Default How was your cars rake set? front down? tail squat under accel wouldn't help you any.

I'm not sure what your class rules are, but I'd try to get the front end down as far as would be safe. What wheels are you using?



How hard is that cluster to obtain and make work? Just a recode? My center display is dead and I'm looking for an upgrade Thanks!
Old 08-27-2004, 05:34 AM
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Yeah, I'd like to have the tach side just to be normal again.


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