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      11-13-2019, 11:18 PM   #67
bentom2
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Originally Posted by ZM2 View Post
Hoping to see this heads up vs the Yoko A052. Iím looking for a streetable arrive & drive tire that has more grip, better manners, and more consistency than the 71R on hot days and thru its life.

Not too much to ask for, right?
Iím interested in the A052 for DE track use as well. They appear to be asymmetric, non-directional, which would be nice for tire rotation on a square setup without flipping on the wheels. Flipping tires here is shockingly expensive and Iím not sure itís worth it. Just paid $165 out the door over the weekend to have a set of RS4s flipped. I prefer to arrive and drive, so running directional tires backwards in the Pacific Northwet isnít a great option either.

Iím running 2.8f 0 toe, 1.9r .18" toe on stock suspension with camber plates.
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      11-14-2019, 05:51 PM   #68
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I ran NT01's on track and have since not found a DOT tire i like better on track (other than Hoosier A/R7's). Ive since ran Pirelli DH slicks.
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      12-09-2019, 03:36 PM   #69
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Thoughts on the Toyo R888Rs: Have them on my 2020 M2 Comp with Apex EC-7 wheels in 9.5 & 10.5 x 19 shod with 265 & 295 R19.

The camber at 2.85 degrees in front and 1.8 rear is perfect. My tire wear and temps across the tread were very consistent - just a couple more degrees of heat in the outer shoulders, which is to be expected - 140-145 was what I measured over the weekend after spirited runs. I was aiming for 36 psi hot (seems to like it there). The car reports pressures 2 pounds less than my gauge, which is interesting. I trust the gauge more than the car.

A few years back, running the R888s on a V8 R8 I was NOT impressed. They always seemed skittish and I never had any trust in them.

My first track event with them on my present M2C (now R888R) wasn't overly confidence inspiring either. They were heat cycled from Tire Rack but I wonder just how effective their cycling is.

I don't know if it was just getting that first weekend of running them in or if it's Arizona Motorsports Park's (AMP) surface or temps (although temps were not chilly at all) that gave me the lack of confidence with them or what.

Went to Buttonwillow a couple weeks ago and WOW, what a change! After getting them warmed up and run a few laps I am very impressed. Sticky sneakers!

The do NOT like cooler temps (especially with lower pressures - was being very lazy and didn't adjust them from 28 cold to what should have been 32-33 for the first session of the day). I actually had the front end just flat out let go and went four wheels off with a student riding shotgun. Car behind me said it looked like I hit ice.

Once up to temp they were very predictive, gave great feedback, especially on the edge, and when they did break free it wasn't a sudden "oh shit" moment (like Pirelli P-Zeros on the street), they just did what I asked and came back with proper throttle/brake/steering input.

I'd chosen to run with the Toyos for my first set of track tires on the M2 because they run quite a bit less (and are a bit easier to find) than the Pirelli Trofeo R, figuring that I'd get some seat time in the car with these and then switch to Pirelli but after the weekend at Buttonwillow, I'm going to stick with these for at least a second set.

I have an HPDE this Sunday at Bondurant's (Wild Horse/Firebird - what ever you may know it as) track and am looking forward to seeing how they work there.

I'll report back next week sometime with more thoughts.

Overall, though, I'm quite impressed with the present R888R offering from Toyo. They work quite well.

I'm still curious as to longevity - have been marking each session to keep track of the life they have on this car.
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Last edited by K-Fab; 12-10-2019 at 06:22 PM..
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      12-10-2019, 02:09 PM   #70
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Thanks for the write up and sharing your thoughts. Good stuff.

Itís actually not surprising the gauge gave you higher temp than pressure sensors mounted to the rims. The car will tell you air temp by the rim and if you measure thread temp you measure the contact patch directly which should be higher.

How did you measure? Using remote IR tool?
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      12-10-2019, 06:29 PM   #71
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Quote:
Originally Posted by 5.M0NSTER View Post
Thanks for the write up and sharing your thoughts. Good stuff.

It’s actually not surprising the gauge gave you higher temp than pressure sensors mounted to the rims. The car will tell you air temp by the rim and if you measure thread temp you measure the contact patch directly which should be higher.

How did you measure? Using remote IR tool?
Ooops! That was supposed to be pounds (have edited). The car reports the tire pressure two pounds less than my gauge. I never paid attention to the temps that the car reported now that I think about it.

I have a Longacre gauge with probe similar to this: Longacre Gauge
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Last edited by K-Fab; 12-11-2019 at 10:34 AM..
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