For some reason I keep eating front tires...bad!

I had bought a set of used continental sport 255 35 19 with 70% Tread
Ate those in about 3000Miles

Now I have bought a set of used yokohama advan 265 35 19 with 70% Tread
I've pretty much eaten these in 500 Miles

And both sets had worn all the way acrossed with with a SLIGHT bias towards the inside

Ok here are the wheel/tire specs:
Front 19x9.5+12, 265 35 19, 255 35 19
Rear 19x10.5+12, 285 35 19

Suspension setup:
bc coilovers - damper setting at 23 Front 23 Rear
spc front a arm/rear camber arm
whiteline bushings - Front inner lower/front outer lower
hotchkis swaybars - Med setting front and rear
Ebay ball joints

*Noticed the compression rod bushings have a short crack, but not completely blown

Ride height: 1/8" above tire/front and back

Alignment:
front
camber -1.8*/-1.5*
Toe 0.05*/0.05*
Frozen Caster 8.1*/8.7*

Rear
Camber -2.5*/-2.5*
Toe 0.10*/0.10*

Has this happened to anyone else?
anyone know what the problem is?

 

Think I might need to raise the front a little to offset the weight distribution?

 

Oh and tire pressure is 35 psi all around

 

What year is your Z?Sounds like the horror stories of the 03-04 cars.Could not get the alignment right.I ate up 3 sets(warranty covered )before I found a dealer that could fix.
Who is doing your alignment?

 

Bushings?

 

Even with bad misalignment, you should be getting more than 500-3000 miles out of a set of tires. It is interesting that you're getting even wear, not just the inside edge that most people experience. Your front numbers are close to mine and I'm getting 20-25K miles on them and I doubt it's purely tire related.

How often are you getting alignments done? What kind of shop (Sears, Firestone or a shop that specializes in tires/alignment/performance cars?) A shop with an uncalibrated machine is worse than no alignment at all.

 

Is it pulling with the caster like that? I'm off .1 and I can feel it. Get it corner balanced plus alignment but do the compression bushings first. Also check the spindle ball joints.
I have front camber at -3.3 and almost no excessive non-autox wear after 2000+ miles.

 

Laser alignment at ALIGNTECH in santa ana, ca
they do not "specialize" in performance vehicles

But if its done w lasers, how could it be uncalibrated?

My vehicles is a 04 Base model/6Mt

 

***Forgot to ad: got new ball joints

And inner/outer tie rods are good

 

new spindles or did you do ebay ball joints? I need mine done.

 

Car doesn't pull one way or the other.

Car doesnt feel all too solid under hard cornering either

*tranny mount bushing and diffy bushing still good

 

Ebay ball joints.
they were nice and stiff

 

I'm thinking the weight balance then, mine was an understeering mess until balance. Looked good but it was amazing how much the spring adjusters had to be set at different heights to get the balance right.

 

What ended up being the issue with your alignment?
how did they fix it?

 

Was wanting to wait till I change out my stock exhaust system prior to doing the corner balance.
but looks like I have no choice.
I hear its like $100 An hour with an average of $300 Total

 

$255 for my second one. Steering wheel isn't straight, rear links NOT adjusted properly, I don't even think they test drove it. First time they stole my spanners, didn't give back my OEM upper control arms and didn't grind down the bumps on the spindle that interfere with SPL UCA's, that I paid $200 to have done plus the $300 for CB/align.

I'm buying my own Longacre alignment balance setup next time.

 

Which shop screwed you over?

 

If you really want to know I'll PM you but I won't say publicly because they're my neighbors at work. Should have complained first time but took a month before I noticed what wasn't done and spanners missing. 2nd time was in a rush or wouldn't have gone.

Balance is near perfect though, why I'm not completely pissed.

 

The car is lowered, the front compression arm bushings are blown. The car will not hold alignment.

 

K.... back to the tire munchin thread