[ZRacerLE]

Originally Posted by breakskeet

This is not a camber problem it is a toe problem.

Was having the exact same problem as you especially on the right front.

Set my fronts to -0.05 and the wear is much more even. That's NEGATIVE and not positive.

See these alignment specs. I got them from another thread:

This is the feedback I'm looking for. I'll try slightly negative.

Thanks!

[breakskeet]

^^^ You're welcome!
Went through many sets before this. Hopefully I saved you some financial pain!

[ZRacerLE]

Originally Posted by nicktechla

Yes! You just said it all brother.

[breakskeet]

Car may feel a little squirrely on the straights. You will get used to it quickly.

Your wear on the outsides seems to indicate the tire is rolling over a bit. You may actually need more camber.

[nighttowl]

Originally Posted by breakskeet

This is not a camber problem it is a toe problem.

Was having the exact same problem as you especially on the right front.

Set my fronts to -0.05 and the wear is much more even. That's NEGATIVE and not positive.

See these alignment specs. I got them from another thread:

is that .05" toe out?

[ZRacerLE]

Originally Posted by nighttowl

is that .05" toe out?

Surely in, but I'll wait for his response.

[ZRacerLE]

Originally Posted by breakskeet

Car may feel a little squirrely on the straights. You will get used to it quickly.

Your wear on the outsides seems to indicate the tire is rolling over a bit. You may actually need more camber.

Some of what you see is an autox practice on street alignment. Ran lots of runs on that day on street alignment.

[breakskeet]

It is NEGATIVE toe. Picture on the right above. Toe out.

I tried 0.00 toe and that was not enough. Still got inside wear.

[SFV1LE]

Yes with 3R or any track tire on ZLE, you need 2 sets of fronts (4 tires) for every set of rears (2 tires) when tracking the car hard.

[breakskeet]

Originally Posted by SFV1LE

Yes with 3R or any track tire on ZLE, you need 2 sets of fronts (4 tires) for every set of rears (2 tires) when tracking the car hard.

Not with my Toyo 888Rs. I have the opposite now, I get 2 track days on the rears and 4 on the fronts.

I only ran one set of 3Rs with this set up and had better wear on the front than before. The 3Rs are harder than the 888Rs and with 750 at the crank, I melt a set of rear 888Rs in 2 days.

[SFV1LE]

Originally Posted by breakskeet

Not with my Toyo 888Rs. I have the opposite now, I get 2 track days on the rears and 4 on the fronts.

I only ran one set of 3Rs with this set up and had better wear on the front than before. The 3Rs are harder than the 888Rs and with 750 at the crank, I melt a set of rear 888Rs in 2 days.

That's really surprising and interesting, I get the same F/R wear pattern with PSC2. And my alignment is good, always get it redone prior to track days. The front wear seems to be a function of the front weight and chassis design, not many cars put 305 in front to achieve grip like a ZLE.

How do you like R888R on track? I've heard bad reviews with ZL1. I ran R888 on my Evo X and you could get decent lap times for a few laps until they got greasy. The thing I liked with my Evo was the treadwear and rain capability--they have a deep tread. I know they hook up for ZL1 drag racing.

[ZRacerLE]

Originally Posted by breakskeet

It is NEGATIVE toe. Picture on the right above. Toe out.

I tried 0.00 toe and that was not enough. Still got inside wear.

I'll give it a shot. Counter intuitive for me though. I picture the inside of the tires rolling under with negative toe, but I'll take your data over my imagination.

[GunMetalGrey]

I got the BMR Radius spherical bushings installed earlier this year on my Camaro ZL1 and on a 19 corner track technical track that I drive very hard and aggressively on, I'm happy to say that I've made it past 2 track days on the SC3R with no cording and the outsides look like they have less tread and more wear on them than the insides. My front camber is -2.7 although I was told camber has very little to do with why the front tires cording on the insides first. Someone said it was "dynamic toe change" in the corner due to stock rubber bushings. Not sure if that true or not but last track season, my SC3's corded on the insides not the outsides.

Once these tires cord, I'll send pics, but right now it looks like they will cord on the outsides first.
Tire temp is 37psi when hot.

[laynlo15]

My son in law has a new BMW M2 with a bunch of Suspension work and he road raced 2 weekends and Rs and he's ready for a new set. He very aggressive as he also does some instructing also. Front and rears. He said they were 1400 a set for the M2