eldoj

I am running my 02 S4 in STU this year and am having trouble finding the right tire pressures. Anyone have any suggestions on a starting point for street tires?

Mods: Eibach springs, bilstein shocks and neuspeed rear bar.

Thanks

paul_858

Whoa your car qualifies under STU?

NVR_FLLW

I've narrowed it to this as a starting point. I'm trying a little more in the rears. Keep a log, including weather conditions specifically during your heat(s). Also, re-check/adjust pressures just before EACH run. Chalk tire edges, too. Note: Chalk data is useless once you over-drive the tires. PS - Have Fun!!!

eldoj

for the STU class and I havent chipped it. I've only done suspension mods.

From sccaforums.com

"STU will follow the STX rule set, but will raise the displacement limit for otherwise STX-legal vehicles to 3.1 liters
for forced induction and to unlimited displacement for natural aspiration. To accommodate the greater power of these
vehicles, restrictions on wheel width are lifted and the maximum tire width will be increased to 275 for front or rear
wheel drive vehicles (but will remain at 245 for AWD vehicles). Other than these limited exceptions, the STX rule set as
described in 14.11 applies. This class extends the Street Touring concept to cars including the Audi S4, BMW M3 (E36),
Chevrolet Camaro, Dodge Neon SRT-4, Ford Mustang, Mazda RX-8, Mitsubishi Lancer Evo. 8, Pontiac Firebird, Pontiac GTO,
Subaru WRX STi, Volvo S60 R, and Toyota Supra. Excluded vehicles include the E46 M3 and the E39 M5."

s4wood

I had H&R coilovers and Neuspeed rear sway 19mm on soft setting. BTW, if it means anything..I was able to get 3rd place in CSP in 2000 in my S4..in the very active SF region. Lower pressures from there...as needed.

J4SON

yup, I think its the B6 that can't run there

skabaru

I usually run 39f/41r cold... and adjust from there based on sidewall wearing and feel