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Old 11-05-2017, 08:46 AM   #112
Deep Six
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Drives: 2013 FRS / 2013 427 Vert
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Quote:
Originally Posted by nikitopo View Post
Some figures on skidpad lateral acceleration:

Scion FR-S with stock tires: 0.89g
Scion FR-S with Dunlop Star Spec's (215 size): 0.94g
Scion FR-S with Dunlop Star Spec's (235 size): 0.96g

Subaru BRZ 2017 with stock tires and revised suspension: 0.90g

Porsche Cayman S 2014 with stock tires: 1.04g

Sources:
http://www.roadandtrack.com/car-cult...ransformation/
https://www.caranddriver.com/reviews...rm-test-review
https://www.caranddriver.com/reviews...al-test-review



I'm not very familiar with skidpad testing but I am surprised that the tire upgrades didn't yield more significant improvements. Probably needed alignment and suspension changes to take advantage of the bigger, stickier tires.


Now as far as lap times go, I am certain that huge improvements can be made relatively inexpensively. I bought my car used from a friend of mine just as an experiment to see what could be done on a budget. Went to Roebling Road repeatedly to evaluate the progressive changes. This track is 2 miles comprised of primarily fast sweepers.


Completely stock with 10,000 mile Primacy's and upgraded brake fluid the car ran 1:30 and tires were the overwhelming limiting factor. Slow but it was fun.


Cheap coils, with moderate camber changes and 225 RS's yielded 1:26


Using 245 R7's, much more camber and zero rear toe along with header and E85 tune and the results were amazing. 1:20:4 which is really damn fast for a car spec'ed this way.


I think the cost of mods at that point was around $5K but the car could now more than hold it's own against Caymans and many others.
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