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Thread: Front tire rub
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09-28-2007 #1
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Front tire rub
Front tires rub slightly on big road bumps. Tire is rubbing where tread curves and sidewall meet. Already removed 1 fender bolt and changed 1 to a button head. The car is a 67 Camaro, 2" drop spindle, big block, 1/4" positive camber, 17x7 3.75" BS, 225/50 Nitto tire. Will changing camber negative make enough of a difference or would I be wasting time and money?
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09-28-2007 #2
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Maybe. Camber is normally measured in degrees. Any idea what that measurement is? 0.5 to 0.8 degrees negative camber is usually about 0.125" shim on mine. So if you go 1.5 degrees more negative the top of the tire will come in 0.25" or so.
jpJohn Parsons
UnRivaled Rides -- Modern upgrades for your ride.
UnRivaled Rides recent project -- LS9-powered 69 Camaro
09-28-2007 #3
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Have you done the Guldstrand Mod? If the geometry is stock you're getting additional positive camber when the suspension compresses which brings it closer to the outside fender. If you changed your static camber setting to 1/2° plus run either a taller spindle (ATS), taller balljoint (sC&C) or Guldstrand mod to get negative camber gain it might be just enough.
Red Forman: "The Mustang's front end is problematic; get yourself a Firebird."
09-28-2007 #4
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Try a shorter tire, 40 series! that may help also.
09-28-2007 #5
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A 225/45R17 is only 25" tall and might not look right in the wheel wells. I'd do the other stuff first as those are beneficial for other reasons besides clearance, and if there is still a problem, get wheels with the correct offset.
Red Forman: "The Mustang's front end is problematic; get yourself a Firebird."
09-30-2007 #6
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parsonsj,
You are correct, camber is measured in degrees. I did not realize I put inches. I'm currently 1/4 degree positive. That is what I'm wondering, if I put -1 degree camber will it be sufficient?
class67,
I do not want to change the tire, I like the current look and feel a smaller sidewall will look funny.
amcmike,
Suspension does not have any of the mods that you suggested, so that is something I will need to look into.
09-30-2007 #7
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1/4 degree positive camber is not good for anything. So yeah, go to 1 degree negative. That should bring the tops of the tires in about 3/4", maybe even more.
Good luck, and let us know how that helps.
jpJohn Parsons
UnRivaled Rides -- Modern upgrades for your ride.
UnRivaled Rides recent project -- LS9-powered 69 Camaro
09-30-2007 #8
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John,
Just did some mathematical calculations, I think you are correct. If I move camber to -1 degree the tire will move in at least a 1/4". By the way, awesome craftsmanship on your nova.
ED
10-03-2007 #9
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Added .140 wheel shim. Front tires do not rub while driving straight anymore. Rubbed once while entering a clover as I just released the brake pedal and the wheels hit a bump. If I roll the fender lip just a little I'm sure there will be no more issue. I'll also put the car on a rack to see what are my current alignment specs. Who knows, maybe I'm not at -1 degrees yet.
Thanks guys,
ED
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