Wear on outside of tires - suggest suspension upgrades?
 

Hi all,

Had my first HPDE course and noticed that my tires (Michelin PSS) were exhibiting quite a bit of uneven wear toward the outside. I'm running camber bolts up front right now (-1.3). I noticed that my friend's twins were all running less wear than mine (guessing the extra grip from the PSS giving it more roll).

Was wondering what mods you guys would suggest to combat this issue / increase camber. Wondering if it's worth spending money on camber plates / RLCA or just save up for proper coilovers that come with plates. I have my eyes set on Ohlins R&T but not sure I want to drop that kind of money right now. The other option is that I could just put stock wheels/tires back on for now and save my PSS from getting chewed on the outside.

Appreciate any advice / comments you may have. Thanks!

could be case of overdriving the car/tires


do you have any video of yourself driving (specifically your hands)


while more camber and stiffer anti roll will always help, driving beyond the limits of the tires will have them wear down sooner.


did you log your pressures and tire temperatures? Which track was this and how long were your stints?


doing 15 hard laps on street tires is bound to burn through the rubber much faster than doing 3 sessons of 5 with only 1 or 2 being aggressive laps.

A lot of what I've been reading on this forum says that ~2 degrees of camber gives you the best wear pattern

^ to many variables. There is no magic number that fits every tire, spring, swaybar, ride height, track situation.

-Hot tire pressures when coming off track?

-any suspension mods other than the camber bolts?

-As 7thGear said, video preferably in car?

Next time log tire pressures, and if possible tire temperatures at at least 3 points across the width of the tire (inner shoulder, center and outer shoulder).

If you're overdriving the tires you'll get similar wear to not enough camber or too little tire pressure, but the data will look very different.

Thanks for the suggestions guys - I've got footage, will upload tonight. Suspension is stock other than camber bolts (set at roughly -1.3 all around). It was my first time out on the track so a lot of it definitely has to do with driver experience / perhaps over driving.

It was at the new Mosport DDT, ~15 minute sessions.

Between sessions, I was reading ~37 PSI.

stiffer side wallz! :p

More negative camber is the answer.

I agree with above, could be overdriving, could be wrong pressures, could be lack of camber. Could be a combination of all.

Also pics of tires before and after event please.

Will post tonight. Before pictures - tires were new, possibly ~300KM of city driving.

How long after you got out of the car were they reading 37 psi: immediately, some time later, just before going back out again?

Read 37 probably ~45-1 hour after a session. Probably should've been more diligent during the day to take readings right after.

Yeah, if you want to stay on top of tire temps, you check them immediately after you come in, if only to record them and then come back later to adjust them. On a course as twisty/turny as DDT is, they could have been as much as 8 psi higher out on the course than they were when you checked them.

Hey guys, here's some pics. For info, these were essentially new coming in to mosport DDT. Lapping done in 15 minute sessions, 5 sessions in the day. Tires were 33 psi cold in the morning. Video footage of driving to come (with steering inputs)

http://imgur.com/MumbHTN.jpg
http://imgur.com/ZAHrxe7.jpg
http://imgur.com/Kq0R2UN.jpg
http://imgur.com/OR6e76i.jpg
http://imgur.com/6lwbCsA.jpg
http://imgur.com/rB6gUvr.jpg


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