PS4S N0 v P-Zero N1

[rianos]

Have had PS4S on my M4 and thought they transformed the car even from the MPSS that came with them and was going to order 4 for my 911 GTS but have noticed the Porsche rated versions only have a wet rating of B compared to A for the N1 P-Zero. Anyone had both that can offer opinions?

Had a bit of a moment in the car which is what made me think of changing, it could have been fuel/oil spilt on the road as I've never had any issues with the P-Zeros before but Ive only had the car a month or so and have read reviews that don't rate the Pirellis in the wet.

[rianos]

Thanks for the replies guys, car has only done 8000 miles but think i’ll go ahead and replace al 4 with the PS4S if this is what the N1 are like in the wet.

[rianos]

Out of interest what would be invalidated under warranty if running none N spec tyres? I assume anything suspension related? If I'm going to change to PS4S I'm debating getting the non N spec versions as they have better wet rating and planning to increase the size from 245 to 255 or 265 up front. From what I can tell the N spec are just the same as the Audi/Merc specific versions so doubt they're Porsche specific as such (they are however cheaper oddly).

[rianos]

IREvans said:

I’m intrigued what improvement you hope find by fitting a non standard tyre in a wider size onto a 991.2...?

To try and get better front end grip as I'm not a fan of the understeer. I have seen you can get 265/35/20 in the PS4S NO rated (presumably rear size for Cayman/Boxster) and was thinking putting this size on the front of the 991.2 GTS might help dial out a bit of the understeer if keeping the same size rears on. Wondering if doing this would. maintain warranty as while the tyres will be wider they will still be N0 and in theory have better front end grip as these are the same size fronts fitted to the GT3 RS.

[rianos]

Just to update this, I got 4 PS4S N0 fitted in the stock 245 305 sizes and the car is totally transformed. MUCH better steering feel and overall grip, particularly in the wet. Front of the car now feels like its planted, drove it round the same roundabout in the wet that the front pirellis couldn't cope with and the michelins were perfect - as much grip as the pirellis in the dry. The crabbing effect has massively reduced/almost gone too but the ride may be slightly harsher (don't care about this). The pirellis still had 6-7mm on the front and 4-5mm on the rear so its not like I'm comparing badly worn tires to brand new ones, the michelins are just infinitely better than the pirellis and transform the car to what it should feel like.