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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Jun-16-2017, 11:15:49 PM   #1
///ALpineVert
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Default Your Autocross Setup?

I've got an autox tomorrow, I'm pretty new to it, still learning how to drive better.

For those of you that autocross what setups do you run?

What tires? For me it's OE 18, Sumitomo htrz 3 front, PSS rear. Stock sizes.

What tire pressures? I've been all over the place. I start at 36f, 38r.

Where do you like to sit seat adjustment wise, lower or higher? I usually sit lower, can't really see the hood. I'm going to try and sit a little higher tomorrow.

Any swaybars or other upgrades but keeping it in the street class? Nothing for me.

Coupe or vert? Vert

Subframe reinforced yet? No.

What class are you in? F Street Novice. This should be universal. I wonder if it's based on your local club.

Thanks for your replies!
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Old Fri, Jun-16-2017, 11:50:32 PM   #2
TboneM3
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Default Re: Your Autocross Setup?

I think the first step would be to not run mixed tires.
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Old Fri, Jun-16-2017, 11:56:18 PM   #3
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Default Re: Your Autocross Setup?

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Originally Posted by TboneM3 View Post
I think the first step would be to not run mixed tires.


+1...

Sumitomo on front and pss in rear? The thing will probably not want to turn...
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Old Sat, Jun-17-2017, 12:16:36 AM   #4
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Default Re: Your Autocross Setup?

Get equal tires and just learn how to max out your car from that. AutoX has a lot of helpful participants to talk setups and talk driving. When you begin to max out with your M3 can do, then you'll really appreciate every mod you add to make your setup even faster. It'll also make you hero of the group because you'll actually know what you're talking about instead of just doing everything before.
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Old Sat, Jun-17-2017, 12:34:12 AM   #5
///ALpineVert
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Default Re: Your Autocross Setup?

Quote:
Originally Posted by BTB View Post
+1...

Sumitomo on front and pss in rear? The thing will probably not want to turn...


Trust me, I know this. I bought the car last year and the PO had just installed a new set of POS sumitomos, I know they are terrible from previous experience but they were new. The Rtabs were bad, I didn't know this at the time of purchase and ate through the rears in 5k miles. I had PSS installed in the rear. The fronts had so much tread that I couldn't justify fronts knowing I had to spend over 1k on a clutch. I replaced Rtabs and got an alignment, then took care of the clutch.

I'm dealing with what I call "wife capital". I only have so much I can do at once. I'll have the fronts replaced this fall with PSS.

My main goal with this thread was to get a little dialogue on autox in general. The people in our local club are great and give good advice.

I'm interested in what this community does with their setup.

Understeer is a ***** for me right now with my current situation but I can live with it. It's still fun and I'm in the top 3 out of 20 or so novices. Still learning how to drive at the limit and every time out I'm better.

Cheers!
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Old Sat, Jun-17-2017, 12:44:56 AM   #6
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Default Re: Your Autocross Setup?

At least you can accelerate like a bat out of h@ll. You just can't turn while doing anything at speed. LOL

Sell the front tires and put some PSS back on. You might even find a deal on Craigslist if you're patient. Crap is crap and if you have a couple $$$ extra then dial up your experience of what the M3 is all about and don't waste your years of driving just to use up a less than stellar performing tire. You can't buy back 2-3 years of "dealing" with it but you can make a choice today to correct it with a very minor economical setback which will actually turn into more an investment because of the safety you've gained with the overall experience from autoXing now.
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Old Sat, Jun-17-2017, 12:48:11 AM   #7
///ALpineVert
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Default Re: Your Autocross Setup?

I get it, they are on the list.
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Old Sat, Jun-17-2017, 12:55:02 AM   #8
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Default Your Autocross Setup?

Quote:
Originally Posted by ///ALpineVert View Post
I get it, they are on the list.


I think the only way to add traction to the front is lower air pressure to more get more tire footprint on the ground. But you risk softening the sidewalls so much that now you lose lateral stability and potentially rolling the tire.

Removing the front sway bar will help to soften the front up for more grip at the cost of extra roll so you have to ease your lateral transitions as the front could "wallow".

Maxing your front camber by removing the little bolts/pins keeping OEM camber in check may help a little as well.

It's hard to fix that because of such a dramatic tire compound/design difference.

You'll only be as fast as the slowest setup axel you have and if you've already felt like you maxed out with timing, then your next step is addressing the weakest link and go from there.
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Old Sat, Jun-17-2017, 01:14:49 AM   #9
///ALpineVert
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Default Re: Your Autocross Setup?

Quote:
Originally Posted by rovert604 View Post
I think the only way to add traction to the front is lower air pressure to more get more tire footprint on the ground. But you risk softening the sidewalls so much that now you lose lateral stability and potentially rolling the tire.

Removing the front sway bar will help to soften the front up for more grip at the cost of extra roll so you have to ease your lateral transitions as the front could "wallow".

Maxing your front camber by removing the little bolts/pins keeping OEM camber in check may help a little as well.

It's hard to fix that because of such a dramatic tire compound/design difference.

You'll only be as fast as the slowest setup axel you have and if you've already felt like you maxed out with timing, then your next step is addressing the weakest link and go from there.


Thanks. I'll try a couple of pounds lower tomorrow. I think the PSS fronts are coming sooner rather than later.
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Old Sat, Jun-17-2017, 01:28:48 AM   #10
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Default Re: Your Autocross Setup?

Take the DSC off and use the throttle to rotate the back of the car to correct the under-steer
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Discussing Your Autocross Setup? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)