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The Star Specs were by far the best move you have done thus far. The 615s get greasy very quickly especially in 70*F+ weather, and they are not very communicative at the limit and the grip after the tire is sliding is pretty low. The SSZ1 and AD08 make a lot more audible noise than the 615 and give more feedback at the limit as well as have more grip once the tire is sliding. I will say however, that the 615s do make a lot of grip, noise, and grip when sliding in very cold climates, but anything warm (let alone hot) they are very vague. The SSZ1/AD08 are also about a couple seconds off of R-compound tires. On a Speed World Challenge Touring Car, the AD07 (which is about a second slower than the AD08 on a 1-2 minute track) was just over a second slower than the Toyo R888 R-compound tire. Although I won't make the claim the AD08 is as fast as the R888, it should be within a couple seconds of the R888 at most tracks.IMO that is the suspension over the bushings.Maybe invest in a Recaro RPF1 or Downforce NSX-R replica seat?As stated above, R-compounds really aren't much faster than your current tires. I also disagree somewhat that R-compounds will slow your learning curve. Just like your Spec Miata rebuttal, your high grip street tires (or R-compounds) will make your cornering speeds higher and lap times better just like a SC NSX will because of its greater performance over a SM.
The Star Specs were by far the best move you have done thus far. The 615s get greasy very quickly especially in 70*F+ weather, and they are not very communicative at the limit and the grip after the tire is sliding is pretty low. The SSZ1 and AD08 make a lot more audible noise than the 615 and give more feedback at the limit as well as have more grip once the tire is sliding. I will say however, that the 615s do make a lot of grip, noise, and grip when sliding in very cold climates, but anything warm (let alone hot) they are very vague.
The SSZ1/AD08 are also about a couple seconds off of R-compound tires. On a Speed World Challenge Touring Car, the AD07 (which is about a second slower than the AD08 on a 1-2 minute track) was just over a second slower than the Toyo R888 R-compound tire. Although I won't make the claim the AD08 is as fast as the R888, it should be within a couple seconds of the R888 at most tracks.
IMO that is the suspension over the bushings.
Maybe invest in a Recaro RPF1 or Downforce NSX-R replica seat?
As stated above, R-compounds really aren't much faster than your current tires. I also disagree somewhat that R-compounds will slow your learning curve. Just like your Spec Miata rebuttal, your high grip street tires (or R-compounds) will make your cornering speeds higher and lap times better just like a SC NSX will because of its greater performance over a SM.
