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asterix_the_gaul said:'These tyre filling pressures apply only to the tire makes and types approved by Porsche.'
I.e. If you are not running n-rated tyres different pressures may be applicable..
crash7 said:32/34 hot - Yoko recommend not going above 34 with AD08R.
DerbyJim said:crash7 said:32/34 hot - Yoko recommend not going above 34 with AD08R.
You use Yoko AD08Rs on your Porsche? How do you find them in comparison to, say, Michelin Pilot Sports?
I have the AD08Rs on the Lotus, absolutely love them and was wondering if I could go that way with the Porsche as well!
crash7 said:DerbyJim said:crash7 said:32/34 hot - Yoko recommend not going above 34 with AD08R.
You use Yoko AD08Rs on your Porsche? How do you find them in comparison to, say, Michelin Pilot Sports?
I have the AD08Rs on the Lotus, absolutely love them and was wondering if I could go that way with the Porsche as well!
I find them excellent with performance closer to Michelin Cups than Pilot Sports, dry grip is perhaps just short of what you see from Cups, but wet grip is better.
When all things are considered, wet & dry grip, predictability, cost I think you will struggle to find a better all round duel purpose (Road & Track) tyre.
Demort said:Tyre pressures should be set from memory at 20 degrees tyre temp .. so to be spot on a road test then adjust them .
I would agree with say 3 psi lower but more than that and i feel , although i could well be wrong , that you will get uneven tyre wear .. that would be rather expensive .
I can say from experience that low tyre pressures can make a car feel anything from excellent to unstable .. i guess there is a sweet spot but either way then close to the original pressures is what i would have to recomend .
I work in bar so depending on what wheels / tyres you have fitted it should be either 2.5 bar or 2.5 front and 3.0 rear , your original setting would seem to be wrong and a geo should be done with correct tyre pressures .. its kinda basics 1 O 1 on a geo adjust to have correct pressures .
No offence young man.. id hate to cause that .
996ttalot said:Demort said:We basically run 2.5/3.0 depending on the tyre pressure as well. But it has to be set at 20c e.g. when the tyre is cold. The problem is that it doesn't take much driving for them to creep up above 20c.
You are not suppose to run less than 0.5 bar below those.
Then you have the difference between half load and full load and so on.
If you car is sitting outside overnight in these temps then for each 10c less you should expect the tyre to be 0.1 down.
And don't rely upon garage forecourt tyre gauges - they vary too much. Our gauges are calibrated each year but we check regularly each gauge against the others to ensure they are fine in between.
Other factors such as tyre condition and age are going to affect how the car feels as well as outside temps.
Ken
0.5 bar is 7 psi, which taken off 36/44 is.....29/37. Given the part-load rating on the previous table is 31/39, I reckon 30/38 is spot-on for my car (which I only really ever drive in alone)!