Manthey GT2RS beats ZR1 lap time by 2 tenths at Road Atlanta:-/
Thread Starter
Race Director
Joined: Dec 2006
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From: Fort Worth, Texas
Manthey GT2RS beats ZR1 lap time by 2 tenths at Road Atlanta:-/
Don’t understand how a car that is modified 7 years after being out of production can now hold a production car lap record?
https://www.roadandtrack.com/news/a7...-road-atlanta/
https://www.roadandtrack.com/news/a7...-road-atlanta/
Last edited by PRE-Z06; May 19, 2026 at 01:46 PM.
Racer
Joined: Feb 2018
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Don’t understand how a car that is modified 7 years after being out of production can now hold a production car lap record?
https://www.roadandtrack.com/news/a7...-road-atlanta/
https://www.roadandtrack.com/news/a7...-road-atlanta/
Race Director
Joined: Jul 2005
Posts: 11,199
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From: Think BEFORE hitting "Submit Reply"
It doesn't matter, imo.
That GT2RS can't be bought from Porsche today.
Someone went out and drove in anger and beat the ZR1, I get it.
Very cool car and I loved my Turbo S but I'd personally take the ZR1 over that GT2RS for a nice daily monster.
Who really cares about those lap times.
That GT2RS can't be bought from Porsche today.
Someone went out and drove in anger and beat the ZR1, I get it.
Very cool car and I loved my Turbo S but I'd personally take the ZR1 over that GT2RS for a nice daily monster.
Who really cares about those lap times.
Thread Starter
Race Director
Joined: Dec 2006
Posts: 12,356
Likes: 2,893
From: Fort Worth, Texas
It doesn't matter, imo.
That GT2RS can't be bought from Porsche today.
Someone went out and drove in anger and beat the ZR1, I get it.
Very cool car and I loved my Turbo S but I'd personally take the ZR1 over that GT2RS for a nice daily monster.
Who really cares about those lap times.
That GT2RS can't be bought from Porsche today.
Someone went out and drove in anger and beat the ZR1, I get it.
Very cool car and I loved my Turbo S but I'd personally take the ZR1 over that GT2RS for a nice daily monster.
Who really cares about those lap times.
Race Director
Joined: Jul 2005
Posts: 11,199
Likes: 982
From: Think BEFORE hitting "Submit Reply"
I agree, that is strange...they may have done it just to see if it could even be done.
Instructor
Joined: Nov 2021
Posts: 225
Likes: 200
It doesn't matter, imo.
That GT2RS can't be bought from Porsche today.
Someone went out and drove in anger and beat the ZR1, I get it.
Very cool car and I loved my Turbo S but I'd personally take the ZR1 over that GT2RS for a nice daily monster.
Who really cares about those lap times.
That GT2RS can't be bought from Porsche today.
Someone went out and drove in anger and beat the ZR1, I get it.
Very cool car and I loved my Turbo S but I'd personally take the ZR1 over that GT2RS for a nice daily monster.
Who really cares about those lap times.
Last edited by NK-minnesota; Yesterday at 07:09 AM.
Thread Starter
Race Director
Joined: Dec 2006
Posts: 12,356
Likes: 2,893
From: Fort Worth, Texas
I like P-cars too, but this is like GM modifying a C7ZR1 and taking it back to the track. Maybe the 991 GT2RS results are being used as benchmark for 992 GT2RS as they want to ensure the latter is faster, but still don’t understand the claim to new production car lap record on a vehicle that hasn’t been in production for 7 years and now modified.
Last edited by PRE-Z06; Yesterday at 12:45 PM.
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Melting Slicks
Joined: Aug 2003
Posts: 2,237
Likes: 2,166
From: Cary NC
Because the newest Porsches couldn't get the job done 
Porsche is expanding the Manthey program in the US and wanted the marketing. My understanding is that they simply needed horsepower for the RA record, in spite of the GT3 RS making ~2200 pounds of downforce at 177mph; the GT2RS was making ~1200 pounds of downforce but the power was the difference. IMO this really shows the area where Porsche is behind (opportunity) that Porsche is going to target in the upcoming RS.
On the plus side for Porsche, lighter weight helped, but the GT2 RS used for the record had a pretty significant downforce-to-weight ratio advantage, as compared to the ZR1. Increases in grip track directly with increases in this ratio, up to a point.
Porsche is expanding the Manthey program in the US and wanted the marketing. My understanding is that they simply needed horsepower for the RA record, in spite of the GT3 RS making ~2200 pounds of downforce at 177mph; the GT2RS was making ~1200 pounds of downforce but the power was the difference. IMO this really shows the area where Porsche is behind (opportunity) that Porsche is going to target in the upcoming RS.
On the plus side for Porsche, lighter weight helped, but the GT2 RS used for the record had a pretty significant downforce-to-weight ratio advantage, as compared to the ZR1. Increases in grip track directly with increases in this ratio, up to a point.
Last edited by RedLS6; Yesterday at 11:53 AM.
Thread Starter
Race Director
Joined: Dec 2006
Posts: 12,356
Likes: 2,893
From: Fort Worth, Texas
Because the newest Porsches couldn't get the job done
Porsche is expanding the Manthey program in the US and wanted the marketing. My understanding is that they simply needed horsepower for the RA record, in spite of the GT3 RS making ~2200 pounds of downforce at 177mph; the GT2RS was making ~1200 pounds of downforce but the power was the difference. IMO this really shows the area where Porsche is behind (opportunity) that Porsche is going to target in the upcoming RS.
On the plus side for Porsche, lighter weight helped, but the GT2 RS used for the record had a pretty significant downforce-to-weight ratio advantage, as compared to the ZR1. Increases in grip track directly with increases in this ratio, up to a point.
Porsche is expanding the Manthey program in the US and wanted the marketing. My understanding is that they simply needed horsepower for the RA record, in spite of the GT3 RS making ~2200 pounds of downforce at 177mph; the GT2RS was making ~1200 pounds of downforce but the power was the difference. IMO this really shows the area where Porsche is behind (opportunity) that Porsche is going to target in the upcoming RS.
On the plus side for Porsche, lighter weight helped, but the GT2 RS used for the record had a pretty significant downforce-to-weight ratio advantage, as compared to the ZR1. Increases in grip track directly with increases in this ratio, up to a point.
Safety Car
Joined: Apr 2006
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From: WI
Completely understand as their advantage has been lower weight compared with the recent generation Corvette’s. The Corvette used to wear bigger shoes, but now the GT3RS wears 275/335 rubber. Porsche has usually made more downforce, but that’s drag and they need more power to overcome it on the straights as you mention. So they’re adding hybridization, but that’s more weight and slows it down in the corners. Maybe we are starting to reach the pinnacle of “street” cars.
Melting Slicks
Joined: Aug 2003
Posts: 2,237
Likes: 2,166
From: Cary NC
For these reasons, I feel these modifications are really pushing the "production car" moniker.
Last edited by RedLS6; Yesterday at 01:57 PM.
Race Director
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From: Think BEFORE hitting "Submit Reply"
Thread Starter
Race Director
Joined: Dec 2006
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From: Fort Worth, Texas
I believe the same as far as power. I’m assuming the 992 GT2RS is going to be hybrid like the new 700hp Turbo S when I mentioned more power/hybridization, the new GTS went that route as well.
Last edited by PRE-Z06; Yesterday at 02:45 PM.
Thread Starter
Race Director
Joined: Dec 2006
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From: Fort Worth, Texas
Manthey attempted to add downforce without additional drag. They have a lot of underbody tricks, endplates, and other things that reduced drag to balance the additional drag generated by the wing. But who really wants to drive that GT2 around with those silly aerodisks stuck to the rear wheels? For these reasons, I feel these modifications are really pushing the "production car" moniker.
For these reasons, I feel these modifications are really pushing the "production car" moniker.
Thread Starter
Race Director
Joined: Dec 2006
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From: Fort Worth, Texas
Instructor
Joined: Sep 2019
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The key (in my opinion) to their improvement with the GT2RS is the Trofeo RS tire, if you are not familiar they are at least a second faster per minute on track than the Cup 2R. I ran a set on my 992 GT3 RS and they feel like Hoosiers for the first 4 or 5 laps.
Race Director
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From: Think BEFORE hitting "Submit Reply"
The article narrative states "The GT2 RS ran on Michelin's Pilot Sport Cup 2 R N0 tires rather than a set of Pirellis."
R&T and Fred Smith really dropped the ball on the details.