N0 vs N1 Cup 2 for 991 GT3
08-07-2018 | 12:18 AM
#16
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I went on Tire Rack to see what the other options are with the 20" wheels.
Trofeo R is very expensive, and when I tried them a few years ago with the Cayman R, the grip was only good for the first day or two, so I think they're out.
I noticed that Hoosier R7 is available in the correct size. I'm not keen on using a tire I can't drive to and from the track, but have long wondered what the GT3 would be like with a proper cheater tire. Has anyone tried the R7 and had any experience with the warranty being denied (or not)?
Trofeo R is very expensive, and when I tried them a few years ago with the Cayman R, the grip was only good for the first day or two, so I think they're out.
I noticed that Hoosier R7 is available in the correct size. I'm not keen on using a tire I can't drive to and from the track, but have long wondered what the GT3 would be like with a proper cheater tire. Has anyone tried the R7 and had any experience with the warranty being denied (or not)?
08-07-2018 | 12:19 AM
#17
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Have only tried Cup 2’s and Dunlops but i did have a conversation with someone and i have read that tires offering much better grip are correspondingly much harder on the car. If you do run non oem tires i would expect stuff to wear out much quicker, and Porsche to deny warranty claims for it. Just what i have heard and read.
08-07-2018 | 12:23 AM
#18
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I have a 991.2 Gt3 and tracked two days on the N1 cup 2's. I was 1 full second faster at Barber with 991.2 vs. my old 991 gt3. I am convinced it was the car (engine and suspension) and not the No vs. N1 that created the 1 second improvement. I have two track days on the R7 and I have driven them on the street a few times (to and from gas station mostly)...if I have my choice, and I guess I do.....I will always run R7's at the track from here on out. Different grip level completely. Hopefully I dont break the bank running them. My goal is to get 3 track days out of a set of R7's....4 if the run times are fairly short
08-07-2018 | 12:30 AM
#19
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08-07-2018 | 12:38 AM
#20
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08-07-2018 | 01:56 AM
#21
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Grip of Hoosier is only marginally better then a fresh MPSC2.
Its faster but just as an FYI may car found about 3 seconds from MPSC2 to Hoosier at Sebring (2:15-2:12), BUT a lot of that speed comes from better gearing 19"-21" and a gigantic drop in Center Of Gravity and being able to drop the nose on the ground.
Ceramic rotors keep the front tires from overheating as much and that' alone I tested to be good for 0.5sec. With the nose on the ground, I can run Max wing, diffuser and Gurney lap and still no understeer.
I also respect the manual and have replaced the bearings, center locks, upright, etc as per manual.
I would love to try the RE71's but they only go to 295 I think.
Its faster but just as an FYI may car found about 3 seconds from MPSC2 to Hoosier at Sebring (2:15-2:12), BUT a lot of that speed comes from better gearing 19"-21" and a gigantic drop in Center Of Gravity and being able to drop the nose on the ground.
Ceramic rotors keep the front tires from overheating as much and that' alone I tested to be good for 0.5sec. With the nose on the ground, I can run Max wing, diffuser and Gurney lap and still no understeer.
I also respect the manual and have replaced the bearings, center locks, upright, etc as per manual.
I would love to try the RE71's but they only go to 295 I think.
08-07-2018 | 08:27 AM
#22
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hogwash, I think those folks are full it...but, granted, I have never had to pursue a warranty claim on any suspension components. And honestly, if I have a suspension issue, I'll probably just replace it with the best available aftermarket part available anyway. The only warranty items that I would be concerned about would be big ticket items..like PDK and engine.....And I am not worried about Porsche denying claims as to PDK and engine due to use of R7's. They will have trouble overcoming the Magnuson Moss Act.
08-07-2018 | 08:49 AM
#24
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08-07-2018 | 08:53 AM
#25
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Moderator: Could you please change the thread title to "N0 vs N1 Cup 2 (and other tire options) for 991 GT3"?
That sounds like about the delta I'd expect, and isn't a small delta. With Hoosiers, I expect that the 991.1 GT3 will about match the pace of a 996 Cup on slicks.
I too am becoming convinced that the significantly faster lap time of the 991.2 vs .1 GT3 has little or nothing to do with the N1 vs N0 tires. And it's impressive that Porsche was able to do that, making the .2 GT3 even faster than the .1 RS.
Grip of Hoosier is only marginally better then a fresh MPSC2.
Its faster but just as an FYI may car found about 3 seconds from MPSC2 to Hoosier at Sebring (2:15-2:12), BUT a lot of that speed comes from better gearing 19"-21" and a gigantic drop in Center Of Gravity and being able to drop the nose on the ground.
Its faster but just as an FYI may car found about 3 seconds from MPSC2 to Hoosier at Sebring (2:15-2:12), BUT a lot of that speed comes from better gearing 19"-21" and a gigantic drop in Center Of Gravity and being able to drop the nose on the ground.
I have a 991.2 Gt3 and tracked two days on the N1 cup 2's. I was 1 full second faster at Barber with 991.2 vs. my old 991 gt3. I am convinced it was the car (engine and suspension) and not the No vs. N1 that created the 1 second improvement. I have two track days on the R7 and I have driven them on the street a few times (to and from gas station mostly)...if I have my choice, and I guess I do.....I will always run R7's at the track from here on out. Different grip level completely. Hopefully I dont break the bank running them. My goal is to get 3 track days out of a set of R7's....4 if the run times are fairly short
08-07-2018 | 09:44 AM
#27
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08-07-2018 | 09:53 AM
#28
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The Ring changed too much and the .1RS never set a real dry flyer.
I can only gauge when on track with equal drivers in front and behind me.
Same out of the corner, GT3 a little faster over 80-100MPH and GT3 a little slower in corners.
I figure it just about balances out at Sebring, Tire per tire.
I can only gauge when on track with equal drivers in front and behind me.
Same out of the corner, GT3 a little faster over 80-100MPH and GT3 a little slower in corners.
I figure it just about balances out at Sebring, Tire per tire.
08-07-2018 | 10:59 AM
#29
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The Ring changed too much and the .1RS never set a real dry flyer.
I can only gauge when on track with equal drivers in front and behind me.
Same out of the corner, GT3 a little faster over 80-100MPH and GT3 a little slower in corners.
I figure it just about balances out at Sebring, Tire per tire.
I can only gauge when on track with equal drivers in front and behind me.
Same out of the corner, GT3 a little faster over 80-100MPH and GT3 a little slower in corners.
I figure it just about balances out at Sebring, Tire per tire.
I agree with trakcar’s assesment that the 991.2 gt3 and 991.1 rs are very close on similar tires.
I would add that I think the new N1 compound might last a little longer than the N0. I switched from a 400 hp 991 3.8 carrera 2s on N0 Mpsc2 to the 500hp 991.2 gt3 on N1 MPSC2 and am getting similar tire life despite running 2+ seconds a lap faster on a 1.8 mile track.
08-07-2018 | 06:37 PM
#30
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The Ring changed too much and the .1RS never set a real dry flyer.
I can only gauge when on track with equal drivers in front and behind me.
Same out of the corner, GT3 a little faster over 80-100MPH and GT3 a little slower in corners.
I figure it just about balances out at Sebring, Tire per tire.
I can only gauge when on track with equal drivers in front and behind me.
Same out of the corner, GT3 a little faster over 80-100MPH and GT3 a little slower in corners.
I figure it just about balances out at Sebring, Tire per tire.