I've read every thread here on alignment, but can't find a definitive answer...

AP2 with stock rims and suspension, Azenis 615's 255/40 rear, 215/45 front. Present alignment is stock done about a year ago. I've been at Willow Springs big track twice recently, and while the balance of the car is good, don't feel that it's settling in adequately at higher speeds.
While there's plenty of talk of alignment #'s for AP1 and the UK spec, what would you all recommend for the 615's....I don't care if they don't wear evenly. I bought these tires to have fun , so that's my priority. I still have the stock tires to go back when I trash the 615's. ....all input and experiences appreciated.

Also, any recommendations for a San Fernando Valley/Conejo Valley, CA alignment shop?

thanx,

Mark

 

I'm a nobody with next to zero racing experience, so don't take any of my advice seriously, but I was thinking:

The Falken Azenis RT615's even in 215/45 and 255/40's narrow the front and rear treadwith difference compared to the stock Bridgestone REO50A's, due to the stock fronts incredibly low 6.7 TW.

If the car is loose at high speeds, could this be corrected with a little more rear toe in?

 

just found a scan of the last alignment...what should I change?

Thanks,

mg

 

Wow, I've only got .14 total toe in the rear on my Kumho 225 and 255 steup, so your toe is already pretty high.

Hope someone else chimes in, as I haven't yet got the RT615, but if you're circuit racing and the end is currently a bit loose, I would up the negative camber on the rear compared to the front. While you're at it, I would increase the front as well.

Maybe try this:

Caster: 6.3
F camber: -1.0
r camber: -2.5
f total toe: 0.0
r total toe: .50

This should increase the overall limits, while settling down the rear. Again, I'm going off of what other people said.

 

Decided to go with -1.0 front and -2. rear camber. Caster ended up right at 6.0. Front toe at 0, and rear at 1.9mm per side. Old #'s were pretty messed up from where they were set last year.

So far, just driving on street, the car feels fine. Freeway pretty calm, high speed off-ramps very stable, and car wasn't darty.

mg

 

That should do it!