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Old 12-13-2009, 03:43 PM   #171 (permalink)
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Quote:
Originally Posted by Christ View Post
winkosmosis -

Read the last sentence of the first part you bolded in that quote.

" At 62 mph it's only 1/16th psi which is unlikely to generate much force on all but the craziest of aero packages. "

That's 1 lb per 16 sq inches of added contact surface (in plan view) of added downforce. The only real advantage is pushing less air under the car, more out and around/up and over it, into less turbulent areas, so less energy is being used to compress air between the road and the car, and there is less of a venturi effect.

That's cool and all, but you could lower your stagnation point without a lip/chin spoiler or splitter, just by changing the shape of the bumper.

But that small increase in topside downforce comes with a big decrease in underside lift.

Yes you can change the shape of the bumper but a splitter is easy and cheap

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Old 12-14-2009, 09:52 PM   #172 (permalink)
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Hi All,

I have not read through this whole thread (god, and they call Chicago the windy city). But, I did have an 88 Tempo. It was dead solid at 80 mph on the highway, until the front rack mount holes got slotted. That car had allot of low-end torque. So, going around a specific curve, with a hill in it, I would goose it on the up-hill to pull the front end overly in, then let it jump out right into the center of the outgoing lane. I once had a cop follow me on a friday night when I did this. I guess he though I was drunk. But after he slid into the next lane over after following me in that curve, he figured I wasn't. And since this was all well below the speed limits on the roads, he just backed off and looked for real drunks. The bigger problem with that car was the rear lights would get put out by rain leaking in.

Years and years of this, along with a slide into a curb at 3 mph on glare ice, and rust ended up slotting the holes. The steering wheel would require about 3/8's of a turn before the car would start turning. If the car had any aero problems during the 2 years I drove it like this, I probably would not be typing this to you now.

As can be illustrated by the Prius handling cross-wind highway handling difficulties and resolutions, pinning something on aero-lift without careful evaluation of suspension and body stiffness evaluation can be wholely premature...
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Old 12-15-2009, 04:07 PM   #173 (permalink)
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View topic - Back to the drawing board, apparently... :: Tempo - Topaz Car Club of North America :: www.TempoTopaz.com

hmmm... half the suspension is shot, boy wonder only puts one new strut on at a time, it leaves a trail of parts on the road... and it's unstable because of aerodynamic "lift".

The best part is the rant about EM! And... I thought he was going to laugh at me in the ditch?

hmmm...
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Old 12-15-2009, 04:27 PM   #174 (permalink)
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Quote:
As can be illustrated by the Prius handling cross-wind highway handling difficulties and resolutions, pinning something on aero-lift without careful evaluation of suspension and body stiffness evaluation can be wholely premature...
So what is the solution to the Prius handling problems you mention? Thx,
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Old 12-15-2009, 05:02 PM   #175 (permalink)
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Aw, Mikey lost his back pressure!
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Old 12-05-2010, 08:56 PM   #176 (permalink)
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No not really angelus. the problem is in Lifting you need to expend energy IE thats drag. also when you lift you create instability especially if the lift is not even across all 4 wheels. You also make it easier for the car to move "sideways" IE you never ever want lift. ever :-)

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