Hello all:
I heard Charles of HumbleMechanic on YouTube explain that as part of PDI (pre-delivery inspection) the technicians reduce tire pressure, and that the cars are transported and stored by VW (and, presumably, Porsche) with higher tire pressures to avoid flat-spotting.
Anyone familiar with this? Do you know what pressures are involved?
I'm looking at another month of storage right now before we take our car out. I was wondering if it made sense to pump the tire pressures up, maybe 55, 60 psi.
I have had problems with flat-spotting on another car that was stored for about five months.

 

the conventional wisdom is that the pressure should not be higher than the maximum stated on the tire sidewall.

 

I stored mine since early December 2021 and set at 34 front/38 rear. I just checked them this morning and they are at 32/36.

 

I inflate mine to maximum PSI listed on the tire. 50 PSI.

 

Typically between 45-50. Max is 50 on my tires. Tires also will loose a small amount of pressure by sitting.

 

I didn't inflate at all. I stuck to "take it out for a drive once per month" and it seems to have worked fine for me

 

Add 10 to 15 PSI for storage to what you would normally run on the streets.

 

That is what I do for mine, I also put mine on their side on a tire dolly, so they are not sitting on the rubber. With no weight it does not really matter, but that is what I do.

 

And your first drive out of storage will normally remove all traces of flat spotting…..

 

Not true. It's even printed in the Owner's Manual. I've been storing Porsches since about 2006. Right around 55 psi.

The reality is, modern tires really don't flat spot anymore, and if they do, it's completely reversible upon a good heat cycle.

It always amuses me just how long it takes to bleed the air in the spring. Especially the big fat 21" rears.

 

I'm glad Porsche started putting this info back into the Owner's Manual. For several years, it was gone.

Good example here:

Winter storage tire pressure - Rennlist - Porsche Discussion Forums

 

It's right there. 58 PSI.
That's what I'm going to do.
I think normal recommended pressure is 45 psi rear, so it's another 13 pounds.
I'm not sure about locking the car. Not sure why that's necessary in my own garage.

 

Less parasitic draw on your battery. Only way for the car to enter sleep mode.

During winter hibernation I secure all the car keys in a barometric safe, and turn off most all the insurance (State dependent).

 

Ohhh, and don't run 45 psi in the rear during the driving season. Try 36-38.

 

^ Wow, this is a bit much. How long do you "hibernate" your sports cars?