911 (991) [Official] 2014 Porsche 911 GT3

hoffmeister_fan · Apr 1, 2015

Soup said:

I'll take the gray one to my left.

Soup · Apr 10, 2015

Porsche Guy · Apr 10, 2015

Who speaks German? While it's great that one tire is faster than another, I am more interested in knowing their driving characteristics.

Soup said:

PC Valkyrie · Apr 10, 2015

Porsche Guy said:
Who speaks German? While it's great that one tire is faster than another, I am more interested in knowing their driving characteristics.

This is taken from Rennlist.....someone roughly translated the article:

Text as translated by a friend:

AutoBild Sportscars May 2015

Haftprüfung (Griptest)
Which of the OEM tires is faster? In comparison: a street tire.

Tested:

245/35-20, 305/30-20 ZR

Dunlop Maxx Race (NO) 1:12.1 min
Michelin Pilot Super Sport 1:12.5 min
Michelin Pilot Sport Cup 2 (NO) 1:13.7 min

OZ Racing provided Ultralegerra HLT CL center lock wheels in 20 inch for the tire test in Papenburg. The test car supplied by Daniel Hofman (www.fit4track.com). The center lock nut needs care and patience.

If you’ve ordered a 911 GT3, you’ll receive specially developed sport tires (German magazines often refer to semi-slick/track tires as “sportreifen”, sport tires) from Dunlop or Michelin. According to Porsche both tires deliver the same performance. That’s exactly what we wanted to test with the Dunlop Sport Maxx Race (NO) and Michelin Pilot Sport Cup 2 (NO) on the recreated Hockenheim short course on the ATP Papenburg proving grounds. In addition we brought along and conventional street tire from Michelin, the Pilot Super Sport in GT3 dimension 245/35-20 and 305/30-20 ZR.

Let’s start with the Cup 2. The new Cup, with its broad shoulders, makes an impression even standing still. As is usual with sport tires, the rubber needs a warm-up phase. In comparison to its predecessor the new tires need a few kilometers more to reach optimum operating temperature. But when they do, everything fits. No noticeable understeer, a rear end with lots of bite and predictability. However after the 3rd lap the rear tires start to overheat, costing time in the faster corners with oversteer.

The Dunlop utilizes a similar profile but achieves temperature quicker and is, subjectively, faster in the first curves. Grip on the front end is a tick better, the limits a bit higher. In addition they deliver constant times even into the 5th lap. In the end they’re even four tenths faster than the Cup 2 from Michelin. However, after the tests ,we carefully inspected the tires. While the Michelin were visually fine, with only slight wear, the Dunlop exhibited noticeable torn up in the center of the tire such that we wouldn’t use them in the wet.

And the street Michelin? As expected, it understeered more, however the rear end had similar grip to the semi-slicks. Consistency was also good. However, at these speeds, when the car doesn’t turn in well you lose your trust and speed. Regardless, amazing that the Pilot Super Sport is only 1.2 seconds off the pace of its higher performance brothers.

Conclusion

Two OEM Porsche sport tires at the same level? Not quite. The tires from Dunlop and Michelin are similarly fast, the Sport Maxx having more heat resistance, however with higher wear. The surprise being Michelin’s street tire which is not much slower than the Cup tire.

lbonu1967 · Apr 11, 2015

PC Valkyrie said:
This is taken from Rennlist.....someone roughly translated the article:

Text as translated by a friend:

AutoBild Sportscars May 2015

Haftprüfung (Griptest)
Which of the OEM tires is faster? In comparison: a street tire.

Tested:

245/35-20, 305/30-20 ZR

Dunlop Maxx Race (NO) 1:12.1 min
Michelin Pilot Super Sport 1:12.5 min
Michelin Pilot Sport Cup 2 (NO) 1:13.7 min

OZ Racing provided Ultralegerra HLT CL center lock wheels in 20 inch for the tire test in Papenburg. The test car supplied by Daniel Hofman (www.fit4track.com). The center lock nut needs care and patience.

If you’ve ordered a 911 GT3, you’ll receive specially developed sport tires (German magazines often refer to semi-slick/track tires as “sportreifen”, sport tires) from Dunlop or Michelin. According to Porsche both tires deliver the same performance. That’s exactly what we wanted to test with the Dunlop Sport Maxx Race (NO) and Michelin Pilot Sport Cup 2 (NO) on the recreated Hockenheim short course on the ATP Papenburg proving grounds. In addition we brought along and conventional street tire from Michelin, the Pilot Super Sport in GT3 dimension 245/35-20 and 305/30-20 ZR.

Let’s start with the Cup 2. The new Cup, with its broad shoulders, makes an impression even standing still. As is usual with sport tires, the rubber needs a warm-up phase. In comparison to its predecessor the new tires need a few kilometers more to reach optimum operating temperature. But when they do, everything fits. No noticeable understeer, a rear end with lots of bite and predictability. However after the 3rd lap the rear tires start to overheat, costing time in the faster corners with oversteer.

The Dunlop utilizes a similar profile but achieves temperature quicker and is, subjectively, faster in the first curves. Grip on the front end is a tick better, the limits a bit higher. In addition they deliver constant times even into the 5th lap. In the end they’re even four tenths faster than the Cup 2 from Michelin. However, after the tests ,we carefully inspected the tires. While the Michelin were visually fine, with only slight wear, the Dunlop exhibited noticeable torn up in the center of the tire such that we wouldn’t use them in the wet.

And the street Michelin? As expected, it understeered more, however the rear end had similar grip to the semi-slicks. Consistency was also good. However, at these speeds, when the car doesn’t turn in well you lose your trust and speed. Regardless, amazing that the Pilot Super Sport is only 1.2 seconds off the pace of its higher performance brothers.

Conclusion

Two OEM Porsche sport tires at the same level? Not quite. The tires from Dunlop and Michelin are similarly fast, the Sport Maxx having more heat resistance, however with higher wear. The surprise being Michelin’s street tire which is not much slower than the Cup tire.

Thank you for translation
What a pity they did not choose the Pzero (N0) that came in that size 245/35 and 305/30 being used by 911 turbo S as max perfomance summer tire

Rainer271 · May 26, 2015

70 kilometer after a canadian couple picked up their new GT3 at the Leipzig plant they noticed smoke inside the car. The women who drives the car steered to the breakdown lane of the Autobahn 9 and she and her husband left the car.
Short time later the whole car burnt out.
The wreck was transported to the Leipzig plant to analyse the cause. But the fire didn't start at the engine bay. It seems there were problems with elecricity.
But the most important: the couple stayed unhurt.

savage-It · May 26, 2015

my......God.

JHF · May 27, 2015

hoffmeister_fan · May 27, 2015

^I know the new hotness is the RS, but if i had the ability to buy either, I still would probably opt for the regular ol' GT3

rs271 said:
70 kilometer after a canadian couple picked up their new GT3 at the Leipzig plant they noticed smoke inside the car. The women who drives the car steered to the breakdown lane of the Autobahn 9 and she and her husband left the car.
Short time later the whole car burnt out.
The wreck was transported to the Leipzig plant to analyse the cause. But the fire didn't start at the engine bay. It seems there were problems with elecricity.
But the most important: the couple stayed unhurt.