What do you guys run pressure wise on the 255/275 18" setup? I've been running 32. Basically I based it off the new Toyota supra which has similar weight and balance as the 350Z and comes factory with 255/275/18". Figured those yota engineers did their homework so I wouldn't have to

 

I run any and all tires at 35 psi, good middle ground.

 

35 PSI, all round.

If you're tracking, that's a different story.

 

Varies by tire but I start every set at 40/40 from tire shop then tune pressures down and usually end up right around 38F 36R to help give it a little more slip at the back (in keeping with suspension’s biasing to slight oversteer.)

 

You guys are running pretty high psi then. What kind of tires are you using? I found the bump steer heavily decreases once you get below 33 PSI.

I was pretty sure you need to lower the pressure in a tire when it gets wider and has more volume.
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Really depends on how car is driven. My Z is jus for fun so I run “battle ready pressures” around the clock. No bump steer issues whatsoever.

Bridgestone S04 Pole Position (my remaining sets of wheels wear these) Sumitomo HTRZ3, Kumho PS91, Michelin PSS, Toyo Proxes 1,all like mid-high 30s for best response, grip, and just enough rollover before letting go.

 

That's 35psi on stock sizes FWIW, I may ultimately end up a little higher or lower once I get the 275/305 combo on.