track day and tyre pressure
31 July 2009, 09:51 AM
#1
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track day and tyre pressure
just need some pointers i am off to beford tomorrow for an open pit lane day
i recently did a driver training day at carlimits were i had to put 50 psi in my tyres is this the same for a track day or do i leave them as is
tyres are 215 / 35 / 18 good year eagle f1's
cheers
i recently did a driver training day at carlimits were i had to put 50 psi in my tyres is this the same for a track day or do i leave them as is
tyres are 215 / 35 / 18 good year eagle f1's
cheers
31 July 2009, 10:58 AM
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I'd say keep it same as road, but make sure you check them on regular basis as the temperature will seriously increase the pressure. So let air out to go back to 30-33psi as requiered. Make sure you pump them up back to normal once cold.
Last time at bedford I forgot to check and ended up with 55+psi at the front.
Over inflating your tyre like you did for car limit has the advantage of reducing grip (smaller contact patch) and at the same time reducing side wall usage/damage (less tyre roll in corner).
As a general approximation, more PSI means better handling but less grip, less PSI is obviously the reverse. You can use that as a way to correct the balance of the car (oversteer/understeer)
Last time at bedford I forgot to check and ended up with 55+psi at the front.
Over inflating your tyre like you did for car limit has the advantage of reducing grip (smaller contact patch) and at the same time reducing side wall usage/damage (less tyre roll in corner).
As a general approximation, more PSI means better handling but less grip, less PSI is obviously the reverse. You can use that as a way to correct the balance of the car (oversteer/understeer)
Last edited by Xia; 31 July 2009 at 10:59 AM.
31 July 2009, 11:16 AM
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yeah i would say pretty much same as above road car with road tires run around 28psi track use i put my r888's to around 33-35 psi and come into the pits every 20 mins just to let the brakes cool check and adjust tire pressures, better safe than sorry if its your first track day especially open pit lane be sure to pit regularaly and when you do pit dont apply the handbrake coz you will cook your brakes, just leave in gear. have fun
31 July 2009, 11:23 AM
#4
I put mine up 10% over my usual road pressures.
If you are using the full 3.6 mile circuit you may find 3 to 4 laps enough to start with! Because it's so long, it's not easy to learn the corner sequence - I still didn't know it completely, by the end of the day!
Don't forget that the oil temp. will increase a fair bit (mine was at 120c after 3 laps) Just something to remember!
JohnD
PS Don't forget the noise check BEFORE you actually enter the venue!
If you are using the full 3.6 mile circuit you may find 3 to 4 laps enough to start with! Because it's so long, it's not easy to learn the corner sequence - I still didn't know it completely, by the end of the day!
Don't forget that the oil temp. will increase a fair bit (mine was at 120c after 3 laps) Just something to remember!
JohnD
PS Don't forget the noise check BEFORE you actually enter the venue!
Last edited by JohnD; 31 July 2009 at 11:27 AM.
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