BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Wheels + Tires Sponsored by The Tire Rack
  TireRack

KEEP M3POST ALIVE BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER LINK!
Post Reply
 
Thread Tools Search this Thread
      06-15-2011, 10:44 AM   #1
dcstep
Brigadier General
 
Drives: '09 Cpe Silverstone FR 6MT
Join Date: Nov 2008
Location: Colorado

Posts: 4,825
iTrader: (0)

Garage List
2009 M3  [4.00]
Now that I've got a few hundred miles and 16 autocross laps on my 18" Dunlop Direzza/APEC ARC-8 18x10" square package, I thought that I'd report some preliminary results.

The new tire/wheel setup replaces my factory forged 19" wheels with staggard Michelin Pilot Sport PS2s. The car is lowered slightly on Dinan springs, with just under 2-degrees of negative camber front and back. I got around 8,000 miles out of the Michelins, with around 100 AX laps. I have no complaints about the PS2 as a street tire. They're smooth riding, quiet and wore well and evenly. They kept perfect balance through their life and never got harsh in day to day driving. I ran them at 35-psi on street and 35-F and 30-B for AX.

For AX the PS2 were a compromise, particularly in back, sacraficing a lot of acceleration traction and a bit of cornering traction. The 19" forged BMW wheels are also heavy.

Too bad I couldn't do back-to-back AX comparisons to "prove" a performance gain, but the Dunlops were considerably more secure in acceleration, really digging in nicely. Under cornering, the turn-in bite was still excellent (I was a little worried that the wider tire up front would soften the turn-in, but it didn't) and the steady-state corning feels really solid and less slippery than the PS2s. Unfortunately, the near-stock E46 cars that I compete against didn't show up last weekend at the AX, so I don't know if I picked up the 2 to 5-tenths that I needed to beat them or not. The two cars in front of me are lightened and have turbos. No E92s showed up this time (but I've always beaten them).

Anyway, I'm very, very pleased with what I felt at this AX. The car is easily controllable. I had a noob co-driver, that was only 2-seconds behind me and he had no trouble at all adjusting to the car. (He had MotoX experience. Hence, he'll be pushing me befor the summer is out if he keeps co-driving. He's hooked.) Oh, I ran the pressures at 34-F and 29-B, cold. Next outing I may drop the rears another pound or two to see if I gain even more acceleration traction.

On the street, this is as good a combo as the factory 19" forged wheel/PS2 combo. The balance is perfect, the ride is smooth and quiet. I have no rubbing under any circumstances. The PS2 would actually hit the front liners under extreme front dive when I trail-braked on the AX course, but there's no such annoyance with this 18" setup.

Here's the look:


M3 with new wheels and tires by dcstep, on Flickr

and the tire:


IMG_0267_DxO7D by dcstep, on Flickr

To sum up, the Dunlop Direzza is a great ultra performance tire with absolutely no compromise as a daily-driven street tire. Too bad they don't have some 19" sizes. For those interested in 18" setups, I highly recommend them and the APEX wheels.

Dave

Last edited by dcstep; 06-15-2011 at 11:23 AM. Reason: spell
dcstep is offline   United_States
0
Reply With Quote
      06-15-2011, 04:02 PM   #2
STALKER
Brigadier General
 
Drives: 2008 E90 M3
Join Date: Feb 2009
Location: Toronto, ON

Posts: 3,643
iTrader: (5)

Glad you had better luck with these tires.
I could not get them to balance and had a wicked pull. Dunlop even replaced them for me a few times.
__________________

2008 AW/FR E90 M3-SOLD
2013 991 C4S
STALKER is offline  
0
Reply With Quote
      06-15-2011, 04:07 PM   #3
Kasé Zomé
Captain
 
Kasé Zomé's Avatar
 
Drives: faster than my demons can fly
Join Date: May 2011
Location: SoCal

Posts: 787
iTrader: (1)

Garage List
2011 E90 M3  [4.50]
Had these on my Evo X MR. Almost as good as the stockers but lasted waaaay longer. I'd consider getting these again for my M3.

Thanks for the review!
__________________
1998 M3/4/5
2011 E90 6MT ZCP Slicktop (SOLD)
Kasé Zomé is offline  
0
Reply With Quote
      06-15-2011, 04:08 PM   #4
ben@tirerack
M3Post Supporting Vendor
 
Drives: 740i
Join Date: Mar 2008
Location: South Bend, IN

Posts: 839
iTrader: (0)

Fan of Star Specs, had them on my E36. Bang for the buck is hard to beat. And surprisingly good wet performance for such a low void area.
__________________
_______________________________________________



To credit the forum, click through one of the banners in my signature and the top of the page, or call me direct at 877.522.8473 ext 660.
Email:ben@tirerack.com
ben@tirerack is offline  
0
Reply With Quote
      06-15-2011, 04:09 PM   #5
Sean05
Putcha ang ganda...
 
Sean05's Avatar
 
Drives: 08 MR E92 M3
Join Date: Feb 2010
Location: Los Angeles, Brea CA.

Posts: 5,326
iTrader: (9)

Send a message via Yahoo to Sean05
i had that as well on my s2000 love it...
__________________
Sean05 is offline   Philippines
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 03:44 AM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST