[torsen] Aerodynamic changes...LONG...here we go....
spokes at mail.the-wire.com
Thu Nov 1 23:01:02 EST 2001
First, the background:
I'm working on the rally conversion for my 90q. I love the way it handles on
snow and gravel. I'd be fine with more oversteer in the car, but on
snow/gravel it tends towards neutral/slight oversteer. Of course, put the loud
pedal done and you can get 'er right sideways :-)
This summer...I tried Solo II racing. I like it...but don't love it (like
rallying). Okay, maybe that's not totally true...I'm trying to figure out how
to afford a second car to modify for track. The rally mods (lifted 1.5") don't
exactly cause for great track handling!
On the _track_ the car understeers quite a bit. Like, a whole stinkin' lot.
Now, I know that a lot of it is my driving technique...Gravel technique and
pavement are vastly different...I've discovered! I did, however, allow a very
experienced racer who knew the track and a whole lot of cars drive it. He too
struggled with the understeer.
I would like to reduce the amount of understeer on teh pavement, without having
to vastly change the car for pavement. I know lowering it, throwing on stiffer
springs/dampers and changing anti-roll bars would be great...but that would
counter-act the rally goals. A radical aligment before the paved events would
certainly help...but that would hurt the daily driver aspect (did I mention
it's my daily driver?).
I'm also a student. On a budget. So, we're thinking cheap things to play
with...I mean, this IS the torsen list right? What fun would it be if I just
went out and dropped $2000 for someone elses solution to the problem?
I've read 3 or 4 books on track driving techniques...let's 'assume' the
driver's ability was not an issue. (I'm working on it...)
Increasing front downforce - As I understand it, increasing the front downforce
will certainly help me in the turn-in for the corners, and help the cornering
on faster speed corners. I'd love to playwith/test it...but short of mounting
an adjustable rear wing to the very front of the hood...I can't think of how.
So, I open the field...How can I add more downforce to the front of my audi,
through an inexpensive and adjustable solution. It must be adjustable so I can
test different amounts of downforce.
Assume these things:
1) I can work in wood. (though I don't know how useful this will be)
2) I can work in Aluminum and steel. (no sheet metal brake, but I can get
access if I really need to)
2b) I'm learning to work in fiberglass, but have an experienced person to help
3) Adjustable means 'adjustable within 10-20 min of work'. Super adjustable
usually means more complicated, and more expensive to make.
4) I'm not worried about the finish of the front bumper. I'll drill, I'll
rivet, I'll re-drill and re-rivet. When I find the solution that works, I'll
get a bumper from a lister or scrap yard, and make a permanent version.
89 90q 296,500km
http://home.the-wire.com/~spokes <- Mildly updated Oct 25th.
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