On my stock Brembo wheels 19x9. I upgraded from the stock junk Pirellis 255/40R19, to:

1st. steep. I upgraded to 275/40R19 Michelin Pilot Super Sport only at the rear, car felt great with this upgrade.
2nd. steep. F&R 275/40R19 Michelin Super Sport, Great handling! But increased a bit the grove follow on the road, the car still is able to be under control, just you need to be aware of this.

Now I want to experience Extreme Performance Summer Tires probably they will only be available in 275/35R19's. Which do you recommend based on your experience for DD and some track (curves) work?
-Bridgestone Potenza RE-71R
-Dunlop Direzza Zll

 

I really think you need to switch out to 9.5 or wider wheels to take full advantage of the grip of the wider tires. There are good options in 285/35-19 category which is pretty much the same heights as the stock Brembo setup at 27"

You can get Potenza RE11, RE71, BFG Rival and Kumho Exta XS in that size. From what I've read (meaning no personal experience) the RE71 is the best performance in that category, but I'll be going with the Rival or the RE-11 next due to price.

If you do go with 275/35 you have to take into account the effect it will have to further shorten your effective gearing with 3.73 rear end. But if you're OK with loosing 2-3 mph in each get before hitting redline, I'd go with the ZII Star Spec. Some of my coworkers who track their cars speak very highly of this tire.

 

Hi 5.0Monster,
I think you are right. The last time that I was on the track I noticed that with my 3.73 gear, reaching up to the redline rpm, my car was being limited, so I had to trow 4th shift instead of keeping my 3rd. with that loosing some time, I think it might get worst with the 35's. I was going against a BMW M3 (V8), and he did not had to shift to 4th. (less shifts), that was an advantage for him. Either way, he did .29 secs. the lap and I was behind by .30 secs. my big disadvantage was my 5.0 weight, and that I lost my Brembo brakes, brake fluid boiled and pad got very low. For my next race I already upgraded to Hawk HPS and ATE DOT4.
I like my stock Brembo wheels and don't do many track events, I'm planing to keep them and just upgrade to better tires. No complains with the Michelin PSS, they are great tires, just want to steep up to the next performance level of tires.

 

Hey M3Hunter, brakes make a huge difference for sure. I did grattan racaway last year and my best lap time was 1:34.7. I was on stock suspension, street tires, Carbotech XP10 up front with stock rear pads.

This year I did SS lines, RBF 600 fluid, GT 500 cooling shields and Carbotech XP8s in the rear.

This year I knocked off another 1.5 seconds, and my consistent lap times were in the 1:33.2 range. I'm certain I made up over 1s in brake zones.

You can run an aggressive rear pad all the time, and just swap the front pads for track events. A good front pad will make a night and day difference. No fade, consistent grip and earth stopping power.

 

Good time improvement 5.Monster
Yes brakes upgrades are important, and most of the time we leave them at the end of the list, until we track our Mustangs is when we notice the disadvantage of the stock ones.

 

Get the Potenza RE71R if having a very soft compound is not a big concern for you.