Crown

This is the answer to the increased rear tyre patch for the new 21" MPSC2 N2 305/30R21.

The front of the 992 GT3 will get 255/35/R20 N2 tyres. With the wider front track it will imporve turn in....

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2017 991.2 GT3 Manual, 2017 Alfa Romeo QV, 2017 Macan S

That’s great- same rear width as before with more front width means less understeer.  The GT4 really needed this change (but kept same sizes) more than GT3 ...

18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

I don't really struggle with understeer on the current one to be honest, except maybe in the wet.

OK turn in isn't as crazy as on the RS, but I like it that way, feels more 911...

1969 Mercedes-Benz 300SEL 6.3  / 2008 Porsche 911 GT3 RS (sold) / 2011 Mercedes-Benz C63 AMG Performance / 2014 BMW-Alpina D3 biturbo Touring / 2018 Porsche 911 GT3 Clubsport

Porker:

I don't really struggle with understeer on the current one to be honest, except maybe in the wet.

OK turn in isn't as crazy as on the RS, but I like it that way, feels more 911...

I agree.  I’ve set my rear sway bar to full stiff, because I like a touch of oversteer.  But very happy with balance - I could never make my GT4 this neutral, even with race alignment and Cup suspension parts.  Aside from moving the swaybar one notch in rear, it’s exactly as it left the factory...

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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

Turn in was one of the major pluses of the RS over the GT3. Great to see that the GT3 is getting a wider track in the front  Nice.

2018 White 911 GT3

Remeber the rear of the 992 GT3 will be shod with 305/30R21. Thus the contact patch will be larger than the 991 GT3 by a small percentage.

So forgetting the extra 44mm track on front and rear axle (which is at least consistent) a wider front tyre is needed to restore the balance. The 10mm wider front 255/35R20 should even out the handling (Im not sure but this may be a 6% increase in tyre patch). The tyres will also be the newer generation compound as used on the 991.2 GT3RS N2 tyres however I suspect because these are new products for Michelin OEM Porsche they will carry a N0 designation to denote they are the first iteration of the product...

Much Improved mechanical grip, downforce and dampening on the 992 GT3 is going to be its stand out features. The power bump and 6 x ITB intake is just icing on the cake. In real terms expect a Ring time equivalent to the 991.2 GT3RS without the Cup2R tyres on (just the normal Cup2). The 992 GT3RS is going to need something very special indeed to shave a meaningful advantage over the 992 GT3. But as always Porsche will deliver...

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2017 991.2 GT3 Manual, 2017 Alfa Romeo QV, 2017 Macan S

That all sounds good, but wouldn’t you expect a further improvement of the tires from the current N2?  Not sure of the LapTime above without R tires, but was thinking the 992 would be just under 7 minutes.  I think an active rear spoiler (on either GT3 or RS) is going to save some serious time on Dottinger Hohe.

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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

Grant. Im not sure we will ever formally know. Technically there may be some advancements from the N2 compound but as these are a completely new staggared fitment for Porsche OEM/Michelin they will be likely given a N0 designation regardless of how the compund is formulated, so as such we will have little to benechmark them against.

I believe we will see around a 10-12s a lap improvement of the 992 GT3 over the 991.2 GT3 (PDK vs PDK) so it is possible the hero lap on these tyres will be in the vicincity of 6.59 - 7.02. This is purely speculation but seems very reasonable. This car may not have the overall downforce of the 991.2 GT3RS but it will have the same track, a similar (though slightly inferior) tyre patch and the suspension should be an imporvement on the previous gen GT3. Peak power and torque I expect to be very similar to the outgoing RS however with the new TBs, injectors and ECU tuning I imagine the 992 GT3 will have a 10-15% improvement in Torque across the mid-low to mid range which will certainly contribute (as I sure it did in the 991.2 GT3 - for me the biggest single difference between 991.1 and 991.2 from an engine perspective is the additional mid to low torque). It would be nice if they can also engineer a slightly lighter flywheel set up as I think the lighter unit in the 991.1 GT3 was beneficial....

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2017 991.2 GT3 Manual, 2017 Alfa Romeo QV, 2017 Macan S

How do we know that the rear tire will be 305 section?

Mark - I love your enthusiasm, but I think you’re over optimistic to expect 10-15% more midrange torque over the current motor without increasing displacement (more than single digit CC rumor).  ITB’s are great, but they will be most noticed in their better transition (throttle response).  10-15% more midrange would require jet fuel 

I do expect more than 520ps though and I think a redline slightly above 9k is not impossible  

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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

Hi Guest. I have a spy picture of that rear tyre somewhere (like the front picture that just showed up). Ill see if I can find and post it. Its a 305/30R21 MPSC2. I guess they need to keep the 325/265 combo to give the RS an advantage even for the next generation....

Grant. Yeah. I think you are right. I was probably being a bit optomistic! That said the improved torque between 99.1 and 991.2 is definately felt on the road (probably even "seems" higher in the real world than it actually is on paper) so even a 5% increase here for the 992 could be beneficial. Maybe through improved  resolution fuelling and sychronisation (piezo injectors, higher fuel rail pressures etc). Im sure they have left something on teh table with the 991.2 4.0L unit. Its not impossible for them to go to 9200 rpm with this engine (as we know the Cup equivalent can go to 9400) but for a road application after their disasterous start with the 991.1 GT3/RS/R they may decide to remain conservative....for power I think we will see 527PS tops (fpr a 520 bhp headline). I think the marketing boys will have this on a tight reign. Thats 130 bhp per litre which I think is a nice number for them...

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2017 991.2 GT3 Manual, 2017 Alfa Romeo QV, 2017 Macan S

macca993:

Grant. Yeah. I think you are right. I was probably being a bit optomistic! That said the improved torque between 99.1 and 991.2 is definately felt on the road (probably even "seems" higher in the real world than it actually is on paper) so even a 5% increase here for the 992 could be beneficial. 

Yes, I agree another 5% torque wouldn't hurt (particularly if there is a weight gain).  And we know the 991.2 GT3 was already torque limited a bit by its ECU (same motor making 7 ft-lbs peak more in the RS).

18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

macca993:

Hi Guest. I have a spy picture of that rear tyre somewhere (like the front picture that just showed up). Ill see if I can find and post it. Its a 305/30R21 MPSC2. I guess they need to keep the 325/265 combo to give the RS an advantage even for the next generation....

Grant. Yeah. I think you are right. I was probably being a bit optomistic! That said the improved torque between 99.1 and 991.2 is definately felt on the road (probably even "seems" higher in the real world than it actually is on paper) so even a 5% increase here for the 992 could be beneficial. Maybe through improved  resolution fuelling and sychronisation (piezo injectors, higher fuel rail pressures etc). Im sure they have left something on teh table with the 991.2 4.0L unit. Its not impossible for them to go to 9200 rpm with this engine (as we know the Cup equivalent can go to 9400) but for a road application after their disasterous start with the 991.1 GT3/RS/R they may decide to remain conservative....for power I think we will see 527PS tops (fpr a 520 bhp headline). I think the marketing boys will have this on a tight reign. Thats 130 bhp per litre which I think is a nice number for them...

a friend is running the front tires on the 991.2 GT3 with the width of the RS...difference is there but not too crazy to completely transform the front train. the issue on the GT3 is the lower downforce.

they have to play with the downforce rather than proposing marketing 255 instead of 245... but they will never do it properly because it is RS territory... but the introduction of the active aero is about to show up.

I hope we will not see the cylinders on demand because that will be a joke. I can't imagine a GT3 running on 3 cylinders

the 4.0L will have a small bump in hp, I would say 530hp , they know how to play the stupid game of the marketing...the torque will have its small bump as well and then we will probably see the 8th gear. I can't see them putting back the old pdk box with 7 gears only.

the sound will be a bit muted compared to glorious 991.2's but this is regulation.

GT Lover, Porsche fan

991.2 GT3 manual, 991 GT3 2014(sold)

Cayenne GTS 2014

the-missile:

the 4.0L will have a small bump in hp, I would say 530hp , they know how to play the stupid game of the marketing...the torque will have its small bump as well and then we will probably see the 8th gear. I can't see them putting back the old pdk box with 7 gears only.

Actually, I can see them using the 7 spd PDK box, if it's substantially lighter than the 8 spd (as described).  Just like they used 6 spd Manual while all the other 991's used 7 spd. 

18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

Remember the 6 speed just came at the end of .1 after so many complains...I would not use this analogy for the pdk. 

GT Lover, Porsche fan

991.2 GT3 manual, 991 GT3 2014(sold)

Cayenne GTS 2014

the-missile:

Remember the 6 speed just came at the end of .1 after so many complains...I would not use this analogy for the pdk. 

If the 8spd PDK weighs as much additionally over the 7spd PDK as claimed, then there can be no performance reason to use it.  Only reason would be to make the car quieter and more fuel efficient with a very tall 8th gear (top speed still happening in 7th gear).

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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

Iunderstand the current prototypes are running the 7 speed PDK unit. I think we will see some interior shots of this over the next few months as they start getting out and road testing these cars for climate in various parts of the world. It would be nice at that time to confirm the rev limit on the tacho also (but as we know from 991.1 GT3RS this does not ean it will make production!!). 

I cannot imagine they will bother with cyclinder deactivation. This car as NA engine will already be eating their C02 average so why bother with a few mgrams per part per million. The penalty will stand regardless.

For the 992.2 we may see the need to go to the new transmission to include a hyprid motor inline...

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2017 991.2 GT3 Manual, 2017 Alfa Romeo QV, 2017 Macan S

A few more pics of Porsche 992 GT3 test mule... 

Link:  https://www.pistonheads.com/news/ph-porsche/992-porsche-911-gt3-sports-new-aero--update/39671

Will the senna like wing make it to production? It’s growing on me. But only slowly.....wouldn’t stop me from getting one. 

Tesla Model S P100D & Model X P90D & 2016 BMW i8 & 2017 Sept 991.2 GT3 ordered. 2020 Porsche Mission E on order

Still looks fake to me. If it’s movable then the last pic shows it at maximum AoA? Looks very flat 

2015 911 GT3, 1964 Type 1

DaveGordon:

Still looks fake to me. If it’s movable then the last pic shows it at maximum AoA? Looks very flat 

The rear wing on that Porsche 992 GT3 mule looks terrible! 

No way that Andreas Preuninger would approve such an ugly design for a new GT3 road car... 

I reckon it’s just a bulky disguise for a slimmer fixed swan-neck mount.

2015 911 GT3, 1964 Type 1

DaveGordon:

I reckon it’s just a bulky disguise for a slimmer fixed swan-neck mount.

Agree.  And possibly an active one like McLaren

18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

Grant:

DaveGordon:

I reckon it’s just a bulky disguise for a slimmer fixed swan-neck mount.

Agree.  And possibly an active one like McLaren

that is the combination

GT Lover, Porsche fan

991.2 GT3 manual, 991 GT3 2014(sold)

Cayenne GTS 2014

Interesting how the new RSR uses a 4.2litre engine. Not that I expect a 4.2 GT3 now. But in the future maybe. 

https://www.autocar.co.uk/car-news/motor-shows-goodwood-festival-speed/porsche-991-rsr-racer-debuts-goodwood

Tesla Model S P100D & Model X P90D & 2016 BMW i8 & 2017 Sept 991.2 GT3 ordered. 2020 Porsche Mission E on order

That is how we get more torque across the board (but only implies a 5% increase, not withstanding other improvements to compression and breathing).

18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi

Porsche Motorsport Press Release: Redesigned 911 RSR expected to defend world championship... 

Porsche remains committed to naturally aspirated engine in motorsport 

Stuttgart. Porsche puts its faith in the brand-new 911 RSR (2019 model year) to defend the FIA World Endurance Championship (WEC) title. The race car complying with the FIA GTE regulations is a completely new development. The vehicle from Weissach has undergone improvements in all areas and will replace the successful 911 RSR with which Porsche won the manufacturers’ and drivers’ world championship in the FIA WEC as well as the Le Mans endurance classic (France) and the IMSA races at Sebring and Road Atlanta (Petit Le Mans) amongst other events in 2019.

In developing the new Porsche 911 RSR, substantial insights were garnered and adopted from the extremely successful race outings of its predecessor. “Since 2017 the 911 RSR has yielded us more than 20 class wins in the world championship as well as at long-distance series in North America and Europe. Our job in the development was to make a very good car even better. The engineers at Weissach have perfectly implemented this in every aspect,” says Fritz Enzinger, Vice President Porsche Motorsport.

“We never rest on our laurels,” explains Pascal Zurlinden, Director GT Factory Motorsport. “We’ve extensively analysed all factory and customer campaigns with the Porsche 911 RSR. Our engineers noticed room for improvement in a number of areas. We have made significant progress in the development of our car for the next three-year homologation period, especially in the complex areas of driveability, efficiency, durability and serviceability. Ninety-five percent of the car is new. The only components that we’ve kept unchanged from the predecessor are the headlights, brake system, clutch, driver’s seat and parts of the suspension. Tests so far have run excellently. We’re already looking forward to the first races of the 2019/2020 FIA WEC season.”

New flat engine with larger displacement

In terms of the drivetrain, Porsche remains faithful to its chosen path. The latest nine-eleven is also powered by a six-cylinder naturally aspirated engine. The highly efficient boxer unit positioned in front of the rear axle has a capacity of 4,194 cc and – depending on the size of the restrictor – produces around 515 hp. The new power unit is the largest ever boxer engine to be mounted in a Porsche 911 ex-works, and offers even better driveability over a wider rev-band compared to the predecessor’s proven four-litre aggregate. Power is delivered to the rear wheels via a weight-optimised, more rigid sequential six-speed constant-mesh gearbox. The new powertrain in the Porsche 911 RSR ensures faster gear-shift times and increased efficiency. The two exhaust pipes now exit on each side in front of the rear wheels. The new exhaust gas ducting saves weight and is aerodynamically advantageous.

With the repositioning of the tailpipes, space has been made for an optimised diffuser. The distinctive component at the rear of the Porsche 911 RSR now generates even more downforce. Thanks to the optimisation of airflow at the front and the sides of the Weissach racer, aerodynamic efficiency and stability have increased significantly, thereby further improving the use and durability of the tyres during racing.

Focus on the work of drivers and mechanics

Driveability and serviceability are critical factors in long-distance racing. For this reason, Porsche placed particular emphasis on these aspects when developing the new 911 RSR. The cockpit has been reworked with the focus on better usability. In this regard, extensive feedback from the Porsche drivers proved invaluable. Like with the predecessor, the body made of carbon-fibre reinforced plastic can be swapped out quickly and thus ensures efficient pit processes in long-distance racing.

To give drivers added protection, the active and passive safety elements in the Porsche 911 RSR have been overhauled. The proven collision warning system allows drivers an even better overview to detect approaching prototype vehicles early enough. The optimised roll cage, the FIA side impact panel in the door and cage as well as additional impact protection for the legs improve the passive safety in the event of an accident. Other features include the removable roof hatch and the rigidly-mounted racing seat featuring a six-point safety harness for the driver.

First race outing in September 2019

“We’ve been working on the concept of the new Porsche 911 RSR since 2017. The first designs were created using CAD software. In August 2018, the best racing nine-eleven to date completed its first kilometres on the factory’s own test track in Weissach,” says Pascal Zurlinden, describing the important milestones in the car’s development. Over the following months, the factory team conducted numerous tests. Seasoned Porsche works drivers took turns at the wheel of the new 911 RSR. Parallel to this, the aerodynamics were fine-tuned in the Porsche wind tunnel. “Another milestone was our long-run in March 2019 at Le Castellet, where we included the works teams from both the WEC and IMSA. We covered more than 6,000 kilometres over 30 hours without any technical hiccups. The drivers and engineers were very satisfied. The car received its racing homologation on 1st July,” added Zurlinden.

World premiere at Goodwood

The most spectacular 911 of all time makes its world premiere on 6 July at the Goodwood Festival of Speed (Great Britain). The Porsche 911 RSR will also celebrate its race debut on the British Isles – at the season-opening round of the FIA World Endurance Championship (WEC) at Silverstone on 1 September. Prior to this, the vehicle of the current manufacturers’ world champions will face rival manufacturers contesting the FIA WEC GTE-Pro class for the first time at a two-day prologue in Barcelona (Spain) on 23/24 July. The Porsche GT Team will field two works cars at eight rounds of the 2019/2020 season with drivers Michael Christensen (Denmark) and Kévin Estre (France) as well as Gianmaria Bruni (Italy) and Richard Lietz (Austria). In the IMSA WeatherTech SportsCar Championship, the switch to the latest model will take place in the 2020 season. In North America, an additional two factory-run Porsche 911 RSR will fight for the GTLM category title against competing manufacturers. For customer teams, the vehicle will be available from the 2020/2021 FIA WEC season. 

For the first time, the factory race cars from Weissach will be decked out in two different designs: The typical Porsche white will continue to be the dominating colour on the No. 91 car. Added accents include a centrally-placed red stripe extending from the front hood over the roof to the rear apron, as well as red side sills. Grey highlights on the side complement the clear and dynamic design. On the No. 92 car, the white and grey colours are reversed. The rear wing and the wing mirrors are black instead of white so that fans can differentiate between the two.

Technical data Porsche 911 RSR model year 2019

Concept

• Single-seater race car for the FIA GTE category (USA: GTLM)

Weight/dimensions

• Base weight: ca. 1,245 kg
• Length: 4,593 mm (without splitter, rear wing, diffuser)
• Width: 2,042 mm (front axle) / 2,050 mm (rear axle)
• Wheelbase: 2,513 mm

Engine

• Water-cooled six-cylinder boxer, positions in front of the rear axle; capacity 4,194 cc, stroke 81.5 mm, bore 104.5 mm; ca. 378 kW (515 hp) depending of restrictor; 4-valve technology; direct fuel injection; dry sump lubrication; single mass flywheel; power output limitation via restrictor; electronic throttle; side-exit exhaust system.

Transmission

• Weight-optimised six-speed sequential constant-mesh gearbox; two-shaft longitudinal layout with bevel gear; shifting via electronic shift actuator; shift paddles on the steering wheel; magnesium gearbox casing; multi-disc self-locking differential with visco unit; three disc carbon race clutch.

Body

• Weight-optimised bodyshell in aluminium-steel composite design; removable roof hatch; FT3 fuel cell in front of the car; welded-in roll cage; seat pursuant to FIA 8862_2009 rigidly mounted to the chassis; six-point safety harness for use with HANS®; longitudinally adjustable pedalry; aerodynamically-optimised and quick-release body components made of CFRP; rear wing with “swan neck” mounts; four-post air jack system with safety pressure valve; electronically activated fire extinguisher system; heated windscreen.

Suspension 

Front axle: 

• Double wishbone front axle; four-way vibration damper; with coil spring setup; anti-roll bars, adjustable by blade position; electro-hydraulic power steering.

Rear axle:

• Integrated rear-axle subframe with double wishbone axle; four-way vibration damper; with coil spring setup; anti-roll bars, adjustable by blade positions; electro-hydraulic power steering; tripod drive shafts.

Brakes

• Two independent brake circuits for front and rear axle, adjustable via balance bar.

Front axle:

• One piece aluminium six-piston racing callipers with quick release coupling; internally ventilated steel brake discs, 390 mm diameter; race brake pads; optimised brake cooling ducts.

Rear axle: 

• One piece aluminium four-piston racing callipers with quick release coupling; internally ventilated steel brake discs, 355 mm diameter; race brake pads; optimised brake cooling ducts.

Wheels / Tyres

Front axle:

• One piece forged light alloy wheels, 12.5Jx18 offset 25 with centre lock nut and wheel nuts; Michelin slick 30/68-18.

Rear axle:

• One piece forged light alloy wheels, 13Jx18 offset 37 with centre lock nut and  wheel nuts; Michelin slick 31/71-18.

Electrics

• Cosworth Central Logger Unit; CFRP multi-functional steering wheel with integrated display; shift paddles and quick release; Collision Avoidance System; controlled alternator in connection with LiFePo4 battery; LED headlights; LED taillights plus rain light; illuminated car number and leader light system; black light inside cockpit; electric adjustable wing mirrors with memory function; tyre pressure monitoring system (TPMS); drink system; air conditioning system; membrane switch panel on centre console with fluorescent labelling. 

Press Release Link:  https://newsroom.porsche.com/en/2019/motorsports/porsche-911-rsr-2019-model-year-redesign-fia-wec-imsa-18064.html

Video Link 1:  https://www.youtube.com/watch?v=yAHTtfz317E

Video Link 2:  https://www.youtube.com/watch?v=yrr5u5B0IRs

Nice !  992  GT3 RS will most probably be 4.2 l 

 964 Carrera 4 --  997.2 C2S , -20mm -- 991.2 GT3 RS 

Gnil:

Nice !  992  GT3 RS will most probably be 4.2 l 

Indeed, the 4.2 litre flat-six must be going to make an appearance in a road car! 

With the GT4 and Sypder getting 4.0 engines, it would make sense for the GT3, GT3 RS, GT3 Touring, etc to get the new 4.2 Porsche Motorsport engine...