Maybe, a slightly larger side wall is advantageous, since it might increase the longitudinal contact patch.
I did notice though that TeslaTexasRacing is on 285/30 R18 but with Hoosiers.
A few people here have been discussing the possibilities of getting wider wheels and tires under the Model 3 for track/autox use. So it is about time to start a public thread to see if the community has any good input. What we know fits: 18x9.5+35 with 275/40-18 19x10+30 with 275/35-19 The...
teslamotorsclub.com
In order to fit them, one needs 18x10.5 ET25 rims and significant camber.
In the front and rear the camber can be set using after market upper control arms such as these?
MPP Corkscrew Model 3/Y Front Upper Control Arms - Mountain Pass Performance
The ultimate rear camber adjustment tool to opmize performance on track or optimize feel and reduce tire wear on the street. Lifetime warranty.
unpluggedperformance.com
One option that could also work would be 295/30 R19 in the front and 335/30 R18 in the rear - if 335 would fit at all, of course (possibly not without significant fender rolling).
Hoosier A7 tire specs. Find specs for Hoosier A7 tires in every size available on the market.
tiresize.com
The higher grip in the rear could be offset with a stiff rear sway bar.