Tire Rack AutoX, 1st in class!

handyman

Nice job! What size RE-11's are you running? What wheels?

spearfish25

I'm running 265/35/19 up front and 285/35/19 in the rear on the sport 19" Rays. Cossie has gone crazy and put 285s on the front, which definitely is beneficial for the really tight turns in autoX. However, I think the car's balance is perfect with the 265/285 combo on fast sweepers (well suited for road courses).

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2013 Cadillac V-Wagon, RIP Z

cossie1600

They could have gone faster on the course, too many slaloms I am just jealous as I didn't get over 48mph in the last autox.....

I have only done one event on the new setup. I can't say for sure how much faster I am as everyone I ran against with last year got new A6s. The only thing I can say for sure is that you will still get the plow, but the difference is that the backend seems to have a lot more rotation at lower speed. The car was still stable enough at the higher speed corners. We had 2 figure 8 at the last course, the backend actually stepped out for the first time on these tires. I think the 285 is slightly faster in terms of raw time, but the car just FEELS better.

What psi did you run?

It looks like you have aftermarket suspension on the car, so our feel might be different.

spearfish25

We did 16 runs (yes, awesome). For the first 4, I let the PSI drift up from 35/35 to 37/40. Traction really dropped as the pressures climbed. I bled back down to 32/35 and that gave me my best time of the day. The rears were rolling to the indicator perfectly, the fronts were about halfway down the triangle...maybe from a couple plows.

The only suspension changes I have are front and rear sways and 15f/20r spacers. The improvement with the sways in slaloms is profound, while the spacers make a much more minor improvement but make the car feel more planted.

I agree...you can still make the car plow. But if you brake appropriately and trail brake to get good turn-in bite, the car rotates beautifully. It's a great feeling when the car follows your intended line.

I'll post up two hairpin videos...one with a bad plow and one with a perfect dive through the corner.

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2013 Cadillac V-Wagon, RIP Z

wstar

Nice run there, thanks for representing for the 370Z

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7AT Track Car!
Journal thread / Car setup details

handyman

Thanks for the info! One more noob question, what do you mean by this:

spearfish25

You'll see there is a little triangle on the sidewall pointing towards the edge of the tread. The manufacturer suggests that this is the limit of where treadwear should be occurring (beyond that, your driving on the sidewall). It's a poor man's quick way of knowing if you're rolling the tire. A better way to judge pressures is to measure tire temperatures across the tread with a pyrometer.

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2013 Cadillac V-Wagon, RIP Z