Quote:
Originally Posted by Jason@SportsCar
All of the upgrades in your list will be killed by the 17" wheels, to big and heavy, a 15x7 with a 195 or 205 would be quicker. That said, none of it matters, a Yaris with bolts ons like you describe will never beat a stock MX-5. Look no further than the Solo Natls results, STF can't touch ES or CS, and that is what you are effectively trying to do.
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I dont understand the stf es or cs business. Are those different classes? Im just trying to put up a faster time and do whatever it takes. The 17 that I have are heavier than the 15 inch wheels i have but i have wider tires on the 17s i feel like i have more grip with those wheels tires. The tires that I'm currently running are GT Radial Champiro UHP1 205 /45 R17 88W XL BSW.