Tyre pressures ( again )

I know, it’s been asked a million times, but I can’t find details.

What pressures should I be running for road & also for track?? Mine is an S2 with AO48s. I’ve had conflicting bits of advice, but wondered what the consensus was.

Cheers for your opinions.

Try here:

http://www.exiges.com/ubbz/ubbthreads.php?ubb=showflat&Number=182617#Post182617

Thanks for that. I take it pressures need to be less for the fronts??

I run the same pressure all round hot as it is simple for me to remember :wink:

I know J(SR)ohn had a thought on that and it wasn’t equal.

[quote=C1RVY]I know, it’s been asked a million times, but I can’t find details. What pressures should I be running for road & also for track?? Mine is an S2 with AO48s. I’ve had conflicting bits of advice, but wondered what the consensus was.
Cheers for your opinions. [/quote]

There’s no one correct answer here. My advice is to use other people’s recommended pressures as a starting point. Try going up 2psi at a time then another 2psi and repeat. Then reset and try going down 2psi at a time. It’s hard to tell a difference of 1psi but +2 then +4 then +6 is noticeable.

Try different rates front and rear.

Find out what suits your car and your driving style best - trackdays are a great place to experiment.

Repeat the experiment in dry/damp/wet conditions.

Also check the tyre temps after each trial. Check on the inner, middle and outer part of the contact patch - if the middle is higher then the tyres are probably over inflated and vice versa. Compare the inner to the outer…

… I’m sure you know there are whole books devoted to this stuff but there’s a few starter-for-ten thoughts for you.

HTH

also monitor tread depths over time if tyre wear is an issue for you…
wearing the edges = more pressure required
wearing the centre=less pressure required
…staves off the time for replacement

Thanks a lot guys, appreciated.

Tyre pyrometers rock!
We have bought one for our club use (6 members)
And now no more questions left.

Easy way to monitor & get pressures right, is to use the triangles at the edges of the tyre tread.

Gotta say unc. You are right (once again) …
But not many people are aware of this … me included ,until you showed me at Anglesea…
…respect you old codger x :slight_smile:. Luv ya…

Go on then, share

Ian

For max “contact patch” use the triangles:

Bloody hell. Easy when you know how,eh?

Ah, so they are not just the pointer to where the tread depth indicators are then? Never knew that…
Nice to learn something new every day :smiley:

So if you are wearing to the top of the triangle you’ve got the pressures right?

Yep… well it works for me anyway! :smiley:

The old boy, aint ‘quite’ as dim as he looks!! :wink:

That’s the nicest thing you’ve ever said about me, Sean - ta :smiley:

Yep… well it works for me anyway! :smiley:[/quote]

But how do you know that the wear was not from a previous day (which could have been hotter/colder/different)? Do you mark above the triangle at the start of the day?

[And before anybody says, I am as dim as I look!]