Owned my 2012 991s for four months now and love every moment I get into it. Just wanted to say hello to everyone I been reading all your posts for sometime now. Picked up this one at Hendrick Porsche fully loaded except for full leather and the high end audio.

This 991s is my 4th Porsche since 1974 last one was 2007 boxster. Which leads me to ask one question about these p zero tires. My boxster had continentals and that car tracked so well on any road service with no steering wheel adjustments to keep it straight. But with the 991 tires I'm always making slight steering corrections. So I guess my question is does the boxster have better road manners or are the continentals better that the p zeros.

Also anyone considering the sprint booster buy it had it in my boxster and it's amazing for what it does and my 991s will get one soon.

Thanks all and glad to be part of the this post.

 

Congratulations on the 991 and welcome!

You're probably making more steering adjustments with the P Zeros because it's an even more aggressive tire.

 

Welcome to the club. I am continually impressed with the 991 chassis. Post some pics when you get a chance!

 

I have both a 13 Boxter and 14 911S with Pirellis and the 911 doesn't track any different than the Boxter.

 

That's good to see that you have both with zeros this probably means that the continentals may just track better on the road than the zeros. My boxster wasn't even an S and that thing was great to throw around hard at 11k and they were all used up.

 

Congrats and welcome to the forums!

 

From one '12 991s owner to another, welcome, enjoy and drive it in good health! On certain highways at above 75, the back end goes side to side and it is unnerving. Found out it is the combo of the rutted road frm trucks and the width of the tires.

 

Welcome to the 991 forum! Hope to see some pics of your ride soon.

 

I doubt that tire brand makes too much of a difference in what you are describing. Before you run out and spend the $$, check your tire pressures. The dealers seem to fill them with max speed/max load pressures around 40 pounds in the rear. Then they gain some pressure even in normal driving and the car feels the way you describe it. Try the lowest setting (e.g. "comfort") from the manual for the rears and 3-4 lb less in the fronts and see if that helps. I run 32 front and 35 rear cold and they grow a bit and never trammel, wear evenly, are comfortable and most important also work best. The OEM P-0 are a very good fit to the 991. I replaced mine with Michelin Super Sports and prefer them, but both are outstanding.

Re Sprint Booster: I have not read here anything convincing about it from a customer as opposed to a seller. The 991s is close to maxed out as stock- consider the the extensive mods in the power kit (and the new GTS) cost about $10k is parts to get 30 more hp and slightly shift the torque curve.

 

Congratulations and the best of luck with your purchase; I'm sure you'll love the 991s.


IMO, the Sprint Booster isn't necessary with the manual transmission, especially when "Sport Mode" is activated. The pedal is very linear and has no hesitation whatsoever. However, that being said, I'm not sure if you'll realize an improvement with the PDK. Again, the Sprint Booster adds no power or torque, it simply remaps the "drive by wire" and provides more linearity.

 

Had a Z3 in Germany that was lowered with 3 piece wheels wider than stock. When I bought it, it tracked poorly (very twitchy on the Autobahn) with Pirellis on the front... but... the guy I bought it from had just changed the rear tires to Nokian and left the Pirellis on front because they didn't look too worn out visually. Because the tires all looked good, I was going to change all kinds of old suspension bushings and crap upon the suggestion of some BMW forum members. I just didn't believe that I needed to do that just to make my car track properly so I bought new matching tires for the front even though they "looked" to be in good condition. As soon as I put the new tires on, the car tracked perfectly.

Not sure if it had anything to do with the tires being Pirelli, but I doubt it. Probably just coincidence, but If I were you, I'd take a look at your front tires and make sure they are good to go. Like I said above, visually, I never would have thought the tires needed to be changed to make the car track straight.

 

Thanks, My tires have just 4500 miles on them. I find the post above on the tire comfort level
Setting interesting I'm going to give that a try and see what happens. Thanks for your input.

 

I put a Sprint Booster on my 2014 Wrangler, because the programming of the drive-by-wire throttle made power delivery deplorable. Made a huge difference. But I can't see where there's any need at all for that on a 991 -- or any Porsche I've ever owned or driven for that matter.

 

you might be right about putting one in a 991 but in my 2007 boxster 2.7 it made a world of difference. It felt like a different car.