19" Track Pressure

[Flat-Six]

Anyone have a good starting point (from experience) for 19" cold track pressure (19x245; 19x275). Ballpark is fine.

[Estoril]

Which tires? It matters.

[Flat-Six]

Hankook Ventus V12 for now. Once I get the alignment stable I'll start looking for better tires. I am not looking to stress over 1-2lbs at this point, just hoping to find something in the middle.

[K-Dawg]

There's a pretty wide variance in recommendations for street pressures, and with the few people that track 19s, I don't think you'll get much definitive advice. Start with your normal street pressures and go from there.

Research what to look for and the affects of pressure changes, so you have an idea of what changes you need to make.

[Estoril]

I'd start at 30-31 psi cold. Then manage to 36-37 hot square. Give them a lap to warm up and watch the wear triangles. Measure hot - adjust cold. Tell your Instructor that you need his help to find the right hot pressure based on performance and track temperature.

[Flat-Six]

Yeah I’ve been running 30ish cold shooting for upper 30’s hot. I was curious what others were running. Been running in intermediate so no instructor. I really don’t push it just enjoy driving my pace and was trying to avoid all the tire monitoring, but it guess I prob need to start. Thanks for the response.

[Estoril]

Yeah I’ve been running 30ish cold shooting for upper 30’s hot. I was curious what others were running. Been running in intermediate so no instructor. I really don’t push it just enjoy driving my pace and was trying to avoid all the tire monitoring, but it guess I prob need to start. Thanks for the response.

I'm an instructor and I monitor my tires constantly - even though I already know the cold and hot targets and I'm adjusting for temperature. Attention to tires shouldn't be seen as an inconvenience. Changing temps and weather suggest changes.

[eacmen]

I'm an instructor and I monitor my tires constantly - even though I already know the cold and hot targets and I'm adjusting for temperature. Attention to tires shouldn't be seen as an inconvenience. Changing temps and weather suggest changes.

100 percent. Check your lugs, check your pressures, check your pads. Get in this habit! Do a quick inspection of your car before every session, could save your life.

[cobra]

Those V12's are not very good tires. I ran them for a lot of miles and switching to PSS completely transformed the car.

[Flat-Six]

Thanks. Yeah, I go thru all the suspension and CV Joint bolts cking torque prior to event, as well as cking Pads and rotors for cracks. I do ck the lug nuts after each run, but I have not been cking the tire pressures after each run, but I will start this weekend. I've been setting them Cold low 30's ( Fr 30, Rear 32) and they are upper 30's by the time I am able to ck them, but that's after a slow cool down lap without touching brakes once checked flag is waved, then a lap or two around the infield. I may try and come in to hot pits and ck them mid-way thru a session to see how they look.

Maybe the question that I should be asking it what kine of HOT temps should I be looking for?

Yeah I know the V12's have early limits, but they are fine for now.

[eacmen]

Use chalk. Make a chalk line on the edge of the tread. Any piece of the tread that hits the road will come off. You want to use all of the tread with none of the sidewall.

When i ran nitto 555(?) 19” the hot pressures were mid 30s.

Switched quickly to 18s

[bigjae46]

For lug nuts...DO NOT check them throughout the day. Check them in the AM and be done. Every time you put a torque wrench to it you are adding torque to the fastener. If its torqued properly...it won't come loose.

You'll see about 6-8psi of pressure creep depending on track temps, ambient temps, moisture content in the air in the tire, and driving technique. If you are on stock camber then you can run higher pressures to counteract the dynamic camber change which will destroy the outside of the front tires. I used to target 39-40 psi hot in the front.

If you can add camber, 36-38psi hot works for just about any street tire. Figure about 28-32 psi cold.

[Flat-Six]

Thanks. I should prob add more information to
my post for clarification. When I ck the lug nuts in between, I let them cool first as I never ck hot, and I set torque wrench about 10lbs less as during the day I am cking for major loosening, not trying to re-torque to spec. But understand what you are saying, and thanks for all the information.

tim.

[Obioban]

https://www.michelinman.com/auto/why...s/trackconnect

I will be doing my first event with these in 2 weeks, and am super excited. If you don’t want to think about tire pressures, this is the move— it tells you what adjustments you should make per corner at the end of each session.

mid session it tells you if you’re under driving or over driving your tires, to keep them in their optimal temp range.

Won’t work with your current tires, but next round…

[Estoril]

I will be doing my first event with these in 2 weeks, and am super excited.

On Lightning?