Ronan Mc Cabe

I will be running at Road Atlanta tomorrow and have a few questions:
1) What tire psi are you guys starting out with at the track (air temps should be around 55F and I am running sock rims w/ street tires)?
2) Is there any particular area on the car that needs extra tape protection?
3) Any other words of wisdom / experience?

cij911

Are you using street tires ? If so, I'd start at least 5 psi cooler and then check psi after a session. For a street tire, you could also mark the sidewall with tire chalk (to see how much rollover you are getting) and use a tire pyrometer.

If you are using a DOT racing tire, I would start around 25 psi and then tweak with the pyrometer and how the car feels.

Have fun

PS - Your signature (from Sir Sterling) is some of the best advice for any new racer...The other is use the brakes less - get on them hard and then get off and get back on throttle....Many drivers have a tendency to be on the brakes too long, while not braking as hard as they should...Make sure you brakes are in good shape prior to the event and ideally all fluids are fresh.

Ronan Mc Cabe

thanks for advice. Running street tires

justinwrock

I tracked my E55 quite a bit! Found 38-40psi to be the sweet spot for me. Any more, and I would get some pretty nasty wheel hop when I would toss her hard into a corner, and any less, the steering felt all rubbery. (this was on street tires)

This should give you some encouragement:



Is this going to be your first track outing?

Sosa

I would love to come out there a run. If you don't mind me asking what is the cost?

MRAMG1

A good starting point with street tires is 36 f and 32 r, COLD.

AS these cars are pig heavy in the front, you will need more air in the front to try and combat the understeer. Tweak as needed for your driving style, and have some fun.

In My S, I ran 40F and 30R, however I only had about 4-5 laps before the brakes faded, LOL

Long story.

PS: ANYTHING over 45, and you are driving to hard for the car's suspension, JFYI

Jon2007E63P30

agreed, these are a good starting point

desired_speeds

I've heard of people chalking the sidewall of the tire, doing a lap or two them checking the chalk to see how much its riding on the sidewall then adjusting the tire pressure accordingly.

Ronan Mc Cabe

Thanks for all the advice, looks like I will start with 40psi and chalk and go from there.

Event is hosted by HookedOnDriving, $325 for day (approx 5 sessions of 20 mins each).

Will try and get some photos & review etc.

Thanks again for info.

vntgspd

With 55*F weather and a heavy car I wouldn't be surprised to see your tire pressures climb 8-10psi after a 20 minutes session. I would not "start" at 40psi unless you plan to do a few laps and then come in to check them.

I would start in the low to mid 30's and be sure to do 1-2 warm up laps to bring tires and brakes up to temp before hammering it.

Ronan Mc Cabe

Will do, thanks!