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-   -   17x9 or 18x9 for track? (http://forum.e46fanatics.com/showthread.php?t=710838)

Defjam 10-05-2009 04:41 PM

17x9 or 18x9 for track?
 
Hi all,

I'm starting to setup my old BMW for not only daily use but track use 6-8 times / year. I'm starting out by replacing the suspension with AST 4100 and new tires / wheels.

I've been looking at D-Force either in 17x9 or the 18x9 sizes. Any advice / experiences with these? What tires would you recommend for good track performance and decent real world use?

-Def

n2Bimmer 10-05-2009 05:13 PM

Whatever is cheaper. Also if you dont plan on using a HUGE BBK then the 17's will do just fine.

mrshelley 10-05-2009 05:39 PM

I'd stick with 17X9. There are plenty of used Hoosier tires out there that work great on a 17X9. They are 225/45/17. I sell my used ones for $100/set and they last most BMW club racers for a few weekends. I know of at least one Koni team that has those tires stacked to the ceiling.

murph1379 10-05-2009 05:46 PM

why would you put 225's on an E46? Way under-tired.

Go 17x9 and 255/17's. Unless you're competing, the extra cost of 18x9's to fit 265's isn't worth it.

PEI330Ci 10-05-2009 05:56 PM

Quote:

Originally Posted by murph1379 (Post 10717996)
why would you put 225's on an E46? Way under-tired.

Go 17x9 and 255/17's. Unless you're competing, the extra cost of 18x9's to fit 265's isn't worth it.

Just currious, what qualifies you to disagree with Mr.Shelley's recommendations?

Please take that as just a question.

tiloulou330i 10-05-2009 06:26 PM

Those are the same people who install 19 inch wheel thinking they're gonna gain performance.

murph1379 10-05-2009 06:31 PM

Actually, my question was stupid because I know the answer, they run 225's because they're rules-limited.

The E46 is heavy, and needs more tire than that, especially if not stripped. 245's at a minimum. I'd run 285's on the track if I could fit them. I run 265's for autocross because that's the largest I'm allowed by rules. (which is good, because fitting much more would be a stretch)

I used a set of 255 star specs for a track weekend earlier this year and they were brilliant. When I let my instructor drive, he said they felt like his R-Comps. 255's will fit all around even without careful spacing or lots of camber.

Also 225's won't take full advantage of a 9" wheel. 245-255 will fit perfectly, 265 being a hair wide for 9". I know some of the track guys like to put a skinny tire on a huge wheel, but that's usually (AFAIK) because they're limited by rules on tire width, and a wider wheel will still help for a skinnier tire.

SpeedDemon 10-05-2009 06:42 PM

+1 for 17x9 with 255/40-17 tires if it is a dedicated set of track wheels. Go with 18x9 with 255/35-18 though if they are going to be used mixed street/track since you'll probably want a slightly larger wheel for aesthetic reasons. 17" is perfect for performance though.

n2Bimmer 10-05-2009 07:16 PM

Im going to try my 255's on the front, no spacer, 1.2 neg camber. See what happens.

vaio76109 10-05-2009 07:52 PM

For DE use go with 17x9s because they're cheaper initially and 17" tires are cheaper.

SpeedDemon 10-05-2009 11:24 PM

Quote:

Originally Posted by n2Bimmer (Post 10718400)
Im going to try my 255's on the front, no spacer, 1.2 neg camber. See what happens.

-1.2 camber... why not more?

paintpro21 10-05-2009 11:48 PM

Both sizes are good. It just depends on your budget, or if you had breaks you needed to clear. 17x9" with a square 255/40/17 setup would work great. You wouldn't have to roll fenders, and spacers wouldn't even be needed up front unless you ran r-compounds.

Here's a 255/40/17 on 17x9's all the way around on a lowered car with no other mods for reference (no camber plates or anything else done to it besides springs). If you wanted to be a little more conservative you could go with 245's all the way around. that is an ultra easy setup, and would probably make for a lightly more convenient daily driver tire size. Although I don't think I could really defend that arguement if the 255's fit without issue.

http://i23.photobucket.com/albums/b3...pro21/apex.jpg
http://i23.photobucket.com/albums/b3...ro21/apex3.jpg
http://i23.photobucket.com/albums/b3...ro21/apex6.jpg
http://i23.photobucket.com/albums/b3...ro21/apex5.jpg

paintpro21 10-05-2009 11:51 PM

Quote:

Originally Posted by n2Bimmer (Post 10718400)
Im going to try my 255's on the front, no spacer, 1.2 neg camber. See what happens.

It's going to work no problem. You and I talked about this already ;)

n2Bimmer 10-06-2009 10:33 AM

Quote:

Originally Posted by SpeedDemon (Post 10719597)
-1.2 camber... why not more?

1.2 is for Daily use. Track use is above 2.5. Currently im working on getting more neg camber.

SpeedDemon 10-06-2009 10:41 AM

Quote:

Originally Posted by n2Bimmer (Post 10721297)
1.2 is for Daily use. Track use is above 2.5. Currently im working on getting more neg camber.

All you have to do is sacrifice caster

n2Bimmer 10-06-2009 12:25 PM

Quote:

Originally Posted by SpeedDemon (Post 10721341)
All you have to do is sacrifice caster


yup and maybe the mason bar :cry:

aggieE46 10-06-2009 01:57 PM

I'm running 255s up front with no spacer, no problem.

vaio76109 10-06-2009 03:02 PM

Quote:

Originally Posted by n2Bimmer (Post 10721807)
yup and maybe the mason bar :cry:

Why would that effect caster?

n2Bimmer 10-06-2009 03:30 PM

Quote:

Originally Posted by aggieE46 (Post 10722294)
I'm running 255s up front with no spacer, no problem.


Well you have coupe, its a little harder on a sedan

n2Bimmer 10-06-2009 03:31 PM

Quote:

Originally Posted by vaio76109 (Post 10722671)
Why would that effect caster?


Not the castor but camber, Since the Mason race bar is one piece i dont have any room to move the camber plate studs to gain more neg camber.


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