I know the range of camber and toe settings for our alignment specs. For the '08 coupe sport the front it is 0 - 0.08 degrees and the rear the toe spec range is 0 - 0.22 degrees of positive toe. Presuming maximum or near maximum negative camber, where is the preferred toe setting for optimal tire wear, particularly in the rear?

 

Zero all around. And don't max camber. Rear is great around -1.5 to -1.8.

 

The middle of those values

 

Thanks. Reasoning behind your responses?

 

Modme is correct, go middle
.04 degrees toe in on front.
.12 degrees toe in on rear

Tire scrub at motion will cause toe to go out, and theoretically become zero while driving.
Your toe will also slightly toe out during suspension squat on turns.
The front is designed for toe out on turns due to engineering of the steering knuckle. Your outside wheels will create a larger arc.
Trying to go more toe out than recommended will become squirly on turns.



When you mention positive toe, thats a reading on the Hunter machine whereas positive means negative.
Negative means positive due to double negative.

 

Tire wear can't wear uneven if they're all going straight. Anything besides zero will wear the tire faster. Good news is these cars also handle great at zero toe. However serious track guys will shoot for about 1/8th positive toe in the front so under braking the tires go to zero toe and the rear I think 1/8th negative so turning the tires go to zero toe. This could all be eliminated though with a full SPL bushing kit front and rear with traction arms, toe arms or spring perch arm, camber arm etc etc.

Edit, wait I think I got those backwards. Toe-in for the front so under braking they go to zero, and rear toe-out for cornering. That should be a + for front and - for rear.

 

Toe out on the rear will cause the car to rotate, thats not an option on a street car.

 

Yes, I saw your explanation in your previous post and I actually understand. In the initial post I wrote positive toe but I understand that it's actually positive degrees of toe in. Which is actually really negative toe, and positive toe is actually toe out. Which is not what I want. Hopefully I have now thoroughly confused anyone who has inadvertently wandered into this thread.

But I have my answer that I needed. Thanks for the guidance.

 

Why I like zero toe and mentioned for serious track guys that's what they like.

 

I specifically mentioned in the first post that I was asking about toe settings to maximize tire wear, not anything at all about tracking the car. But thanks anyway for your knowledge.

 

I know and an answered. Just gave a tad more info.

 

now i'm confused lol.

whether its 1/8 or 0.4 toe in the front,
does the positive toe signify toe out \ / or toe in / \ ?

my thought process: under normal driving conditions, tires will toe out a bit so you want to get a bit of toe in to negate that... therefore positive toe is toe in?

 

Jujubii has basically gotten it right. Always think of the car from an overhead view as if you were sitting in it and the front is where the engine normally lives or the direction of travel. From there the tires both front and rear should be toed in - / \ for a few reasons. First it's inherently a little more stable in how in tracks the car down the road. Secondly since most cars have some form of "rubber" or flexible bushings in their suspension, this will usually cause the tire to flex outward from the front of the suspension's axis toward the outside of the direction of travel. Thus using a little negative toe will often come close to zeroing out while driving. Thirdly a slight amount of negative toe puts an amount of preload on the steering and suspension components while moving. This helps in giving the car better road feel in the steering wheel if the steering gear is designed properly by reducing or eliminating steering/suspension play. That's one of the benefits of a well designed rack and pinion steering system in todays modern cars. And please don't bring up the Infiniti's new electric drive-by-wire steering system. Now why any alignment company "Hunter" decided to change how they referenced toe in as positive when it's really negative is just stupid. The operative word here is "in" and the reference is from the direction of the cars normal travel. It's like how the British decided positive grounds were a good way to wire their cars. We all know where that took them.

Al

 

Depends on the machine. Hunter says toe-in /\ is positive. Others machines say negative which is why everyone, even me gets so confused all the time. I just prefer to talk and hear about toe-in or toe-out since those words don't change.

 

Lol. If I'm on a Hunter I just say its toe-in as positive because you're adding the tires inward which is a +. If you take something away its a loss or negative. Maybe that's their thinking which makes sense to me.

Again for the world just say what your numbers are as in I'm 1/8th or 0.04* of toe-in or toe-out, we'll all understand that saying.