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Old 06-30-2010, 03:38 PM   #1
323tom
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Alignment question

hey guys I am going to have a alignment done tommorow, I have front camber plates and rear adjustable control arms, I will be setting the front camber from -2 to -2.5 camber and the rear -2.5 to -3

now my question is should I keep the toe and caster to factory specs or?

the reason for so much negative camber is the tires I put on the car are really big in the front and rear for a non m3... 245/35/19 front and 275/30/19 rear... The car will be street driven more then on the track so yes I know the tires will wear out quicker but theres nothing I can do about that unless I want to rub like crazy!

Let me know what you guys think!

Thanks!
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Old 06-30-2010, 05:04 PM   #2
murph1379
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I highly doubt you'll get the 275s on the rear, even with -3 deg of camber. The 245s will fit on the front with stock camber, but ideally you want at least 1 deg more camber up front than rear for performance applications.

With that kind of stagger, and especially that kind of camber setup, your car will push like crazy no matter what you do, so I'd say leave toe and caster at factory settings, setting toe more aggressive won't make the car rotate, but it will chew up your tires.
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Old 06-30-2010, 06:59 PM   #3
323tom
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They already fit with minimal rubbing, there's people with sedans that have fit 275s and I don't plan on having rear passengers
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Old 07-01-2010, 11:06 AM   #4
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Originally Posted by 323tom View Post
They already fit with minimal rubbing, there's people with sedans that have fit 275s and I don't plan on having rear passengers
hmm, I'm one of those people who've used 275s in the rear. on 8.5" wheels. It was a mistake, it rubbed badly, I dealt with it for about 9 autocross runs, and then I fixed it for the next event.

You'd do better, performance-wise, by flipping that combo around, using 275s up front, 245s rear. I did experiment with that, but on 7.5" wide front wheels, it was about a wash with 245s all around. Of course, that's only if you don't have any options on tires. you do. I'd recommend running 255 or 265 square.

M3s sometimes can make use of larger rear tires because they have more power and a lot more aggressive gearing. For the 330, it's all about front grip.
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Old 07-01-2010, 04:43 PM   #5
323tom
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mine is 275/30/19 on a 9.5 inch rear and 245/35/19 on a 8.5, not sure if you seen my other thread in FI but my drivetrain is all m3 inlcuding a stg 2 HPF so I need the wide tires at the back... I wish I could fit taller tires like 275/35 or 40/19 but my fenders would rub like crazy...
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Old 07-01-2010, 08:43 PM   #6
tinkwithanr
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Out of curiosity why do you need to use 19" wheels? If I was going to be putting down that much power I would run 18's or maybe even 17's with some sidewall on them. It will also free up a lot of rotational mass, not that acceleration should be a problem for you.
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Old 07-01-2010, 09:47 PM   #7
323tom
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Because I prefer 19 inch for the street and I will be ordering a set of 17 or 18 inch lightwheight track rims soon : )
Quote:
Originally Posted by tinkwithanr View Post
Out of curiosity why do you need to use 19" wheels? If I was going to be putting down that much power I would run 18's or maybe even 17's with some sidewall on them. It will also free up a lot of rotational mass, not that acceleration should be a problem for you.
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