44PSI tyre pressure really!

[papamantra]

Hi

I know The Germans rarely get anything important wrong but according to my manual and the handy gold sticker under my petrol flap it says the tyre pressures for my 1990 s2 cab should be 36 front and 44 rear.

Is it just me that finds that a tad high?

Ant

 

[MartinRS2K]

I've just done 1500 miles round Europe in my 944 Turbo with 34psi front and rear and it drove perfectly with 2 occupants and luggage in the boot.

 

[GlennS]

The Porsche Factory Workshop Manual printed in 1991 revises that tyre pressure recommendation for the MY90 S2 cars to 36 front, 36 rear (optional 44 rear).

I ran the rears at 44 for a while and found the rear crashed and banged and skipped around a lot. It is much more compliant at 36 rear and handles typical British roads better.

 

[Neil Haughey]

You want to know high, I cocked up last year in testing and forget to set my tire pressures before a test session. Car felt great but was sliding around like crazy and slow. Came in and the tire pressures had gone up to 60 psi!.

I probably shouldn't admit to that as it was on brand new slicks []

The 44 psi is for very high speed running on the autobahn. I would stick to somewhere between 34 and 38 psi for UK road driving.

 

[ChasR]

ORIGINAL: Neil Haughey

The 44 psi is for very high speed running on the autobahn. I would stick to somewhere between 34 and 38 psi for UK road driving.

Are the latter figures for all round, or for the rears only?

At least one didn't lower their pressures to 30-32 all around. How the Michelin PS2s on the front could have done a few more miles if they had not been overinflated by the PO...

 

[Masher]

I'd been advised to run 30psi all round on track which is what I've done and it feels OK - comments?
Cheers
Mick

 

[edh]

ORIGINAL: Masher

I'd been advised to run 30psi all round on track which is what I've done and it feels OK - comments?
Cheers
Mick

Sounds about right (see the other thread as well..) Track tyres tend to run slightly lower pressures. I think I go for 32psi (hot) on the AD08's and they wear pretty evenly.

 

[Eldavo]

Michelin recommend 32psi hot for Pilot Sport Cup tyres. I'm going to run this on track and am now running 34psi cold all round on road - I was running 32F and 34R on road.

 

[frankydoom]

1989 Cab says 36 psi all round cold from the label in the filler cap on mine.

 

[Masher]

Thanks guys,
Mick

 

[Neil Haughey]

Yes 28 to 32 hot for track depending on the tyre. We tend to set cold pressures fairly low sometimes down to 23 psi but that is only to manage the temp and pressure increase for the race or session duration. For track days you can just start at somewhere near 30 and just bleed back down to the hot pressure after a short session.