Tire pressure for my situation

[SaberX]

I wanted to get the "tracker's opinion" on what my tire pressures should be for my track event tomorrow. Is just an untimed HPDE so I'll be driving at 7/10.

My rear tires (245 - RE730) have about 50% tread and the fronts(205 - RE730) have about 70%.

It may also be just a tad bit wet tomorrow, b/c the weather is a bit iffy here in Seattle.

I want to maximize grip and keep my rear end in line (safety before speed). This will be my 3rd track event and I'll have some instructor time in the morning since its been about a year since I've been on this track. Any advice?

 

[NSXDreamer2]

As you know I had used Kumho MX on my car last year, and at the last event of last year, it was soaking wet in the morning.

What I did was that I was starting to use the cold pressure 34/37 for starter.. (I usually run 34/37 hot on dry track.) Then check and adjust the pressure after each session accordingly.

You are using different tires and having suspension mod, I don't know if my preference will work for you. My thought was that since you had definately been driven in wet roads and I would just maybe decrease one or two psi, starting out even for the first session... then adjust it to your liking. Generally more tire pressure at the back will make the car understeer more. Again, I had never driven RE730 on track nor with it on nsx, I don't know how it does in wet condition...

My take is, make sure you have enough tread to dispatch water, then just focus and drive. Even I hate the water going into the interior (if window's needed to be down) I kind of enjoyed driving nsx on wet track... It will give you a lot more confidence on everyday Seattle driving. With instructors on board, you shouldn't be paranoid about the wet track nor tire pressure... Just ask, they will let you know what's the best at the situation.

 

[PaulL]

If it's damp and you'll be driving at 7/10ths, you could easily start with typical street pressures.

Then depending upon the track, you could just check to see if you're rolling over the tire edges at all and bump the pressure up a bit.

If you want to arrive with more than enough pressure, and only have to bleed it down, then I would guess that you wouldn't need more than 5 psi above normal.