Tire pressure S-03

[Klas]

What tire pressure for Bridgestone S-03 215/40/17” and 255/35/18 do you recommend when crusing down the highway and when tracking your car?
I just put them on and have a track session tomorrow probably on wet.
I have a 1991 NSX.

Thanks in advance for any input.

 

[tosugrad]

This probably does not apply, but: I have stock size 16/17" SO3's and run 34/38 for normal highway use.

 

[MvM]

Hi Klas,
I have Bridgestones in 215/40ZR17 and 265/35ZR18 and am using the standard OEM pressures.
On the track I usually will add a little extra pressure unless it is very hot outside. The higher pressure will make the tires roll less on the tire-walls thereby decreasing the chance of a blow-up. Also, do check you rims for any embedded stones and the tires for any damage before take the car out on the track.

 

[2slow2speed]

I have been tracking with S03's for the past 10 track events or so, and I feel that the tires perform the best with the following tire pressures:

215/40 R17 => 36 cold, 44 track hot
265/35 R18 => 34 cold, 42 track hot

I've had my tires go all the way up to 48psi when tracking the car hard and the S03's feel very slippery, going back down to 44/42 helps quite a bit.

Note that the optimal tire pressure might also vary depending on your suspension setup!

 

[nsxtasy]

I have been tracking with S03's for the past 10 track events or so, and I feel that the tires perform the best with the following tire pressures:

215/40 R17 => 36 cold, 44 track hot
265/35 R18 => 34 cold, 42 track hot

How did you reach that conclusion?

I find it highly surprising that you would use more pressure in the front than in the rear. Of all the NSX owners that I have discussed this with, and there have been many - including many using various tires for track use as well as those using various tires for street use - I have never, ever heard anyone who prefers more pressure in the front than in the back.

You didn't by any chance accidentally reverse the two sets of figures, did you?