Tire Edge Shredding
07-10-2008, 01:38 AM
#31
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Location: Scotland, Yemen, Australia
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Looks like Fender cuts to me.
I've got the same thing on the drivers side (right side) on my vehicle running 205x55 R16's
I plan to roll the lip when I get home this time.
I've got the same thing on the drivers side (right side) on my vehicle running 205x55 R16's
I plan to roll the lip when I get home this time.
07-10-2008, 01:52 AM
#32
Drifting
That picture has fender written all over it.
case closed. Thank you for posting the picture. It doesn't at all look like the sidewall caved under preshure, but it does look like someone took a razor to it. I was wrong all along....and to think it wasn't a preshure issue either.
case closed. Thank you for posting the picture. It doesn't at all look like the sidewall caved under preshure, but it does look like someone took a razor to it. I was wrong all along....and to think it wasn't a preshure issue either.
-matt
07-10-2008, 09:38 AM
#33
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One pic worth a thousand guesses! Concur with the above posters, thats fender rub. If it was due to the push or over-inflation it'd been chunks out of the tread. Those little slices certainly aren't "shredding." No wonder you didn't feel it. I would have the fender edges rolled.
07-10-2008, 10:53 AM
#34
Drifting
Definitely fender lips catching on the tread. Fender rolling is in your immediate future.
What's the offset on those front wheels? - that might be part of your problem.
As far as the hankooks at the track - http://forums.pelicanparts.com/showthread.php?t=417394
I have about 5000 miles on them including a few autocrosses and 2 track days - last one I ran extra sessions. I have plenty of tread left - almost wish they would wear out faster as I'm moving my streets up to 17" wheels.
What's the offset on those front wheels? - that might be part of your problem.
As far as the hankooks at the track - http://forums.pelicanparts.com/showthread.php?t=417394
I have about 5000 miles on them including a few autocrosses and 2 track days - last one I ran extra sessions. I have plenty of tread left - almost wish they would wear out faster as I'm moving my streets up to 17" wheels.
07-10-2008, 07:04 PM
#35
Poseur
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Guys,--it's the fender,--you need to roll the LF fender. I experienced this around 1983 when I put a set of Yokohama A008s on my 7x16 in Fuchs and the first thing that happened was that. I rolled the fender back and the problem went away.
07-10-2008, 08:37 PM
#36
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Roll the fender, or try getting a bit of neg. camber in the front. The negative camber may also help with the "plowing" (understeer) ... and so would entering a corrner a little slower.
One other thing: even on my race tires (filling the fenders) I can just barely stick my finders between the tires and the fender lip to the 2nd knuckle. If you can't get your fingers up and inside the fenders a little, your spacers are too wide. With those 17's, it's always a gamble on the older 911's.
Oh yeah ... your tire pressure: way too high! If you hit a bump or cross the tracks, does it sound like Thor's Hammer under your hood? Try running 30-psi in front, and 36 in rear for a little while. You won't regret it.
Good luck, and remember: in a corner, in slow - out fast. ;-)
One other thing: even on my race tires (filling the fenders) I can just barely stick my finders between the tires and the fender lip to the 2nd knuckle. If you can't get your fingers up and inside the fenders a little, your spacers are too wide. With those 17's, it's always a gamble on the older 911's.
Oh yeah ... your tire pressure: way too high! If you hit a bump or cross the tracks, does it sound like Thor's Hammer under your hood? Try running 30-psi in front, and 36 in rear for a little while. You won't regret it.
Good luck, and remember: in a corner, in slow - out fast. ;-)
07-11-2008, 11:20 AM
#37
Instructor
Thread Starter
So what’s involved in rolling a fender. I’m guessing some technique to flatten the inner lip. Or maybe something that looks like a small bat rolled along the tire to push out the top of the fender. Is this a fairly normal Porsche shop procedure.
07-11-2008, 01:03 PM
#38
Drifting
You can get a specialized tool that bolts to the wheel hub. See here.
There is a risk that you can crack the paint though, from what I have heard it is best to use a heat gun and lots of patience. I am sure if you search more on it you will know more. I think rim and tire shops probably would have the most experience but I am not sure.
-matt
There is a risk that you can crack the paint though, from what I have heard it is best to use a heat gun and lots of patience. I am sure if you search more on it you will know more. I think rim and tire shops probably would have the most experience but I am not sure.
-matt
07-11-2008, 01:58 PM
#39
Race Car
Use a baseball bat and have a couple of beers first to get up the courage.
07-11-2008, 03:50 PM
#40
Rennlist Member
I have Fuchs 7 and 8 on my Carrera which resulted in some rubbing. Just had my front fenders rolled.....notice I say "had"... I did not attempt it. Came out great.
07-11-2008, 05:37 PM
#41
my fenders are cut they taper from about a half inch at the bottoms to less than 1/4 at the top. Rolling them can chip the paint in places you wont like. If you cut them you just have to run a brush along the edge when your done. And they will cut easy with a new pair of tin snips and smooth them out with a metal file
