Advice on Tyre Pressures - Please

[Porsche Driver]

Have just bought a 1989 Porsche 944S2 with the following tyres on it but no recommended tyre pressures anywhere in the paperwork!! Can anyone advise...

Front Tyres are Federal Super Steel 595 215/40 R17 83V

Rear Tyres are Federal Super Steel 595 235/40 R17 90V

Hope someone out there can help......

[bite-me]

There is PSI's for your car on the petrol flap,
however the tyres fitted are non standard

try contacting Porsche for recommendations
or contact the Tyre manufacture for an idea, and you may need to play with values

HTH