GT4 tyre pressure’s for track day advice?
GT4 tyre pressure’s for track day advice?
Author
Discussion

Hcarbike

Original Poster:

12 posts

165 months

Sunday 12th May 2019
quotequote all
Hi.
Iv not long had my gt4 and I’m doing a my first Trackday at brands Indy on Tuesday. Can anyone offer any advice with tyre pressures for the track?

Thanks.

Hcarbike

Original Poster:

12 posts

165 months

Sunday 12th May 2019
quotequote all
Hi.
Iv not long had my gt4 and I’m doing a my first Trackday at brands Indy on Tuesday. Can anyone offer any advice with tyre pressures for the track?

Thanks.

Edited by Hcarbike on Sunday 12th May 00:03

BubblesNW

1,711 posts

207 months

Sunday 12th May 2019
quotequote all
Once they are up to temperature I would try either 31 all round or 31 front 32 rear.

frayz

2,807 posts

183 months

Sunday 12th May 2019
quotequote all
Assuming you're new to track days, please excuse me if not.

You'll need to take a pressure gauge and a tyre inflator as you will be letting air out of the tyres as they come up to temprature. This will need to be added back in as the tyres cool and you need to drive home.
Also make sure you take a wheel bolt socket and torque wrench to check your wheel nuts before and after every session.

Try the oem pressures 31/32psi front and rear and then check temps/wera and adjust accordingly.

Have fun, saty safe smile

TDT

6,131 posts

143 months

Sunday 12th May 2019
quotequote all
BubblesNW said:
Once they are up to temperature I would try either 31 all round or 31 front 32 rear.
Yep. 31psi or 2.1 bar all round, once everything is up to temp and settled is nice.
Might take a couple of short runs to get the balance.

Porsche911R

21,146 posts

289 months

Sunday 12th May 2019
quotequote all
What it says on the door shuts for a novice, , you might have to do 2 bleed downs to get stable pressures, if you have Dunlop’s good luck, if you have cups, 2 bleed downs should last you all day.

Don’t do it pre track time it kills your tyres, so many people let 10psi out their tyres beforehand , it’s bad practice and damaging to your very expensive tyres to go out with low PSi. But a ,lot of people do it.

I do 2 laps as sighters to get to grips with the layout again or any new track curbs ,changes, come in and bleed down, then do 5 laps come in and bleed down again, that’s pretty much it.

Check tyres after lunch and for going home, if they are a bit low after lunch , just don’t push hard for a few laps until back upto pressure, but they don’t drop that much I find.

Again don’t take too much advice on forums, people run all sorts of geo and are at all sorts of levels,some stay out for 5 laps some 20 laps, keep it simple, the oem geo is dire on track anyway, so you will be fighting or driving round that as is. Only way to set correct pressure is to have a mate in the pits with a pyro, nothing else inc advice works hence why I said stick to the door shut pressures.

Above all have fun and if you like it get a geo and buy a pyro, then you can set what’s right for you which I find are the best pressures :-)

Spyder75

194 posts

86 months

Sunday 12th May 2019
quotequote all
Thanks for the info. What’s a pyro? I assume it’s used to measure the surface temperature of the tyre?

JRZed

46 posts

243 months

Sunday 12th May 2019
quotequote all
OP be careful at Brands, I thought they had fairly tough noise restrictions and the GT4 is pretty loud at full chat (in a good way, but not so friendly to the noise meter). Keep the sports exhaust off perhaps.

TDT

6,131 posts

143 months

Sunday 12th May 2019
quotequote all
JRZed said:
OP be careful at Brands, I thought they had fairly tough noise restrictions and the GT4 is pretty loud at full chat (in a good way, but not so friendly to the noise meter). Keep the sports exhaust off perhaps.
Yep, experienced this. Keep the sports exhaust off, and short shift. They’ll usually give you at least one warning.

But main thing is just to get out there and enjoy the event, and post up about your experiences here.

Hcarbike

Original Poster:

12 posts

165 months

Sunday 12th May 2019
quotequote all
Thanks everyone 1 some really useful information. I have done a few Trackdays in other cars and bikes just not something as special as this. Looks like the weather is ok at the moment which is a bonus. Thanks again.