AD08R tyre pressures

[DrHammershaft]

Hi,

I have a set of new 195/50 r15 AD08R, I'm wondering what would be a good starting point for pressures. This will be for a track night at knockhill.

Going to start out with 30 front and 28 rear for scrubbing them in on the road. Good idea?

Cheers

 

[aucky]

Try about 28psi hot, so about 23 cold (they will shoot up)

 

[DrHammershaft]

Try about 28psi hot, so about 23 cold (they will shoot up)

Cheers, same all round? I have nothing in the back bar the cage and a whiteline arb

 

[aucky]

Depends what sort of balance you want. I've started putting a psi or two higher at the back on track to give me a little more adjustability

 

[CamMoreRon]

Mine really doesn't seem to like anything below 27.5 at the rear.. I tried 26 and it just didn't feel right! I generally run 27.5 rear and adjust the front around the 28-29 mark. I have high rear spring rates though.. 450lb/in.

 

[krappy]

Couldn't find anything specific on the yokohama.co.uk website but on yokohama.com.au they say 'Set ADVAN Neovas up like race tyres so that your hot pressures, when you come off the track are between 32 and 36 psi.' Just got a set on my 172 and will use this as a starting point when I take them out on track next...

 

[DrHammershaft]

Thanks for all the input folks, I have 30/28 cold just now for road use to scrub them in. I'll do a few warm up laps and then reduce the pressures to suit on track

 

[chris blue]

i started out 30psi all round for track, then continually let them down to 30psi, then, after advice dropped the rears to 28psi and fronts to 26 psi.

They crept back up to 30, so dropped them to 24 (Advice from a professional driver at lydden hill which is a track that has rep for eating tyres) and the grip was fab, and had a couple really good sesh's at endof day

Problem is, when i got home, the next day i looked at the fronts and theyre well mashed. One has a channel gouged down the centre, and the other has its surface all breaking away, mainly on the shoulders. Rears arent tooo bad

So great times, but the tyres are toast.

Gonna have to get a cheaper option, (7mm used road tyres fitted and balanced for £20?) or run tyres a bit higher

 

[-Jamie-]

Run them higher, 32 hot works well in them on mine

 

[JamesBryan]

You've ran them too low, 32/33 psi on the Clio is about right.

The gouge down the centre is probably from rubbing in the arches.

 

[Coops Mk1]

ai, that low is more slick levels, I run my slicks at 26/26 front rear when hot and the semis same as road pressures 32/30 front rear but when hot

 

[chris blue]

Just taken the front two off, and one seems ok ish, and the other has lumps out of it.
Would that one be ok to run on the track? Tread is several mm, just a few chunks on the outer shoulder missing

Thought it was low to let them down to 24psi, but the grip was immense
Cant get thru tyres that quik tho...