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Old 05-31-2010, 10:08 AM   #1
niko084
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Need some down force I'm guessing on my '02 330ci

It's my DD but I do some track days with it and on the long straight I'm getting up around 140 and the car gets a bit uneasy feeling, to me I think it needs some down force, in the front and back and I'm just kinda trying to find out what functions well and what's for show..

I don't want to spend a ton of money as I said before it's my DD, so it spends most it's life around 75mph, but I would like it to be a bit more stable on that straight.

It's a pretty near stock suspension '02 330ci with the sport package.
Only thing is it has new bilstien shocks, I am planning on a strut bar and sway bars this summer, can't really lower it any further and drive it around here without having to be really careful.
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Old 05-31-2010, 10:16 AM   #2
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I would have suggested H&R or Eibach Sport lowering springs, but you said you'd rather not do that. However, I gotta say that getting your car lower to the ground is the #1 thing to do for tracking. Other than that, you're looking at a front & rear spoiler at the very least, and the body mods can easily run up the $$$ real quickly. Chas

Last edited by ChasCan; 05-31-2010 at 10:20 AM.
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Old 05-31-2010, 10:20 AM   #3
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I would have suggested H&R or Eibach Sport lowering springs, but you said you'd rather not do that. However, I gotta say that getting your car lower to the ground is the #1 thing to do for tracking.
I know and that's what makes me depressed...

If I move to Austin Texas it will get dropped!
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Old 05-31-2010, 10:24 AM   #4
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I know and that's what makes me depressed...

If I move to Austin Texas it will get dropped!
Also nik, lowering your ride will automatically give you more down force. Not as much air under the car & more over the top. Chas
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Old 05-31-2010, 10:33 AM   #5
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Don't put a wing on it for god's sake.
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Old 05-31-2010, 10:37 AM   #6
niko084
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Also nik, lowering your ride will automatically give you more down force. Not as much air under the car & more over the top. Chas
Ya, I know, that's why I mentioned it.

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Don't put a wing on it for god's sake.
I would rather not but I want more stability.


Are the lip spoilers worth anything at all? I think they look clean but have heavy doubts about any noticeable difference.

I considered the CSL, but I don't think it would look very good without compliment from other extensive expensive body mods/
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Old 05-31-2010, 07:03 PM   #7
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What are your alignment specs?
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Old 05-31-2010, 07:35 PM   #8
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What kind of tires are you running? I hit 140mph on my A/S tires which felt very floaty. I've hit 150mph on my summer tires and it felt planted.
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Old 05-31-2010, 10:07 PM   #9
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Putting down force on a car with stock springs is ridiculous.

If you are willing to put a wing on the car then you're clearly willing to make some compromises. Instead of going through the trouble of adding a wing, just accept that springs are the #1 thing you need to do to make the car feel more stable and then drive more cautiously around town. It is not hard to drive a lowered car, even on horrible roads if you just keep your head screwed on straight.

With your Bilsteins you should consider going with some H&R Sport springs if you want to make a minimal compromise and if you're willing to go a step further then order up some Ground Control coilover retrofits so that you can use linear spring rates in the front and rear. I'd think that 350# front and 450# rear would work out well (I don't think that I'd go higher than that with the way your Billies are currently valved).
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Old 06-01-2010, 09:02 AM   #10
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Old 06-01-2010, 11:22 AM   #11
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Tee hee
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Old 06-01-2010, 02:45 PM   #12
niko084
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Alignment I'm running stock numbers still.

Tires, I didn't think about that...
But I was running AS tires... Waiting for some more cash to get my other wheels/tires for summer/track use.

I'll get a tape measure but seriously... ..
My Camaro SS was dropped 1.5" and was impossible to get into a lot of parking lots without bottoming out in the center, I believe it sits higher than my 330.
Bumps in the road are the least of my worries, at least those I can steer around.
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Old 06-02-2010, 08:19 AM   #13
snortdavis
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The Camaro probably stuck out way farther in the front with the pointy nose.

Just Sayin'
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Old 06-03-2010, 01:32 AM   #14
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Just take the driveways and ramps slowly and at an angle and you'll almost never have a problem.

My car is really low and I have never touched bottom with it.
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Old 06-03-2010, 02:56 AM   #15
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Quote:
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Tires, I didn't think about that...
But I was running AS tires... Waiting for some more cash to get my other wheels/tires for summer/track use.
I would try some good tires first before anything. AS tires aren't made for grip. Aren't BMWs engineered to travel at Autobahn speeds? I would think that our cars, if well maintained, wouldn't have any issues safely going 150mph.
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Old 06-03-2010, 03:25 PM   #16
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I would think that our cars, if well maintained, wouldn't have any issues safely going 150mph.
If you have the sport suspension it would be fine - even the non-sport would be ok, but I wouldn't do it.
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