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The Tire Rack's Tire & Wheel Forum
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Old 12-04-2012, 10:32 AM   #1
ajai
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Dunlop direzza star lost grip so fast

after one night of hard testing of my coilover.
the front tires grip are like 30% less..
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Old 12-04-2012, 10:59 AM   #2
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sounds like a very scientific analysis has been performed.
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Old 12-04-2012, 12:56 PM   #3
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http://forum.e46fanatics.com/showthread.php?t=957696
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Old 12-04-2012, 01:06 PM   #4
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Tried Dunlop before and never buy again...
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Old 12-04-2012, 01:38 PM   #5
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the tires still have a lot of thread , just that the grip is lost.
The surface of the tire became less smooth.
is there ways to regain tire grip or make the surface smooth again? Since tires is still very new, I don't want to get another set
.
if I exchange the smoother ones all in front, and the bad ones in rear. and try to go up in rear damper ( to fix oversteer)
will that be a good ideA?
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Old 12-04-2012, 06:21 PM   #6
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Tried Dunlop before and never buy again...
The Star Spec Z1 is a badass tire if grip is your goal.

This coming from someone who's a total Michelin/Bridgestone fanboy otherwise.
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Old 12-04-2012, 10:17 PM   #7
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Z1 has great grip ! but only when grip last..
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Old 12-05-2012, 12:26 AM   #8
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Sticky compound tires are not supposed to be smooth. I know you feel that you have to let everyone know about your daily dilemmas with your car but thats what Facebook is for. Stop flooding the forums with nonsense.
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Old 12-05-2012, 09:34 AM   #9
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sounds like a very scientific analysis has been performed.

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Old 12-05-2012, 01:07 PM   #10
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What I was to explain is that I only did about 4 to 5 hard cornering and u turns in wet road. It did power slide a little, but then this little of cornering is big enough to cause the tire to lost grip by that much? That's seems not reasonable. And the tires looks fine. now the car feel like flowing on the road even in dry...
will increase the psi more helps?
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Old 12-05-2012, 01:13 PM   #11
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Maybe you broke a sway bar end link or something. I don't think your issues are tire related.
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Old 12-05-2012, 08:39 PM   #12
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As from what I can see, one side of the car, the front tire have wear at where the sidewall meets the thread. well right where the triangle ar pointing. But the other side have non wear.
I assume tahrs because the turns are all in one direction? And 34 psi might be too low so that when hard corner the side wall meets the road?
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Old 12-07-2012, 01:56 AM   #13
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okay.. I finally know what is werid. I have front camber -2.30
however, the inner tread has no wear, but the outer tread got wear instead. which makes it slippery,
but with neg camber, isn't it suppose to be the other way around,?
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Old 12-07-2012, 05:49 AM   #14
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New coilovers with poor set up equals poor grip, is there damping adjustment with these coilovers and if so were are they set.

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Old 12-07-2012, 02:10 PM   #15
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Yea it got damper adjust. 32 way
I am at 20 front 13 rear
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Old 12-10-2012, 12:19 AM   #16
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Maybe you broke a sway bar end link or something. I don't think your issues are tire related.
^ This happened to me and the handling got really crappy real quick. Take a look under and inspect it.
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Old 12-11-2012, 02:13 AM   #17
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since I have explain before about the werid tire wear, will an alignment do the work? however alignment was done three months ago, will a hard cornering change the alignment ? since my tire is still very new . Just one side of the front outer tread is more wear out
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Old 12-11-2012, 11:19 PM   #18
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Seriously, this thread reeeeeaaaaalllly needs to DIE!!!
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Old 12-11-2012, 11:33 PM   #19
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however if I get it corner weighted, but my suspension is new and now with 30% more metal. But with more metal I got less grip, so my tires wore upside down? But alignment is expensive, my new coilovers have 15% higher ratio of horsepower.
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Old 12-14-2012, 12:01 AM   #20
ajai
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Originally Posted by zhp43867 View Post
however if I get it corner weighted, but my suspension is new and now with 30% more metal. But with more metal I got less grip, so my tires wore upside down? But alignment is expensive, my new coilovers have 15% higher ratio of horsepower.
I booked a appointment to check the sway bar end link and stuff next week. Will update. The shop look at itand think the tires are ok and don't think that's the cause. after checking the sway, I might recheck the alignment too.
I have heard from local BMW ppl, they said bc coilover are easy to get loose on e46, and that might cause the alignment toe to change easily.
when I first got the coilover, I have redo my toe 2 times in a month.
After checked the coilover are not mounted tight enough.....
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