Sep 6, 2018 1:54:49 PM
I too was interested in a MSO option but got the following on July 13 from Niklas (who I believe is the son of Mike Flewitt the MD) Senior Client Services Exec.
I have just now followed up with MSO and the person responsible for Aftersales parts – they are looking into the possibility at the moment, but as of yet, there is nothing confirmed. I cannot speak on if one is to be released for the future, but we are definitely looking into the possibility.
So I decided to not wait and did my research on the available options and settled on the above. I was told that as long as the cats are left in place then there are zero warranty issues, the exhaust post cats doesn't do anything for performance (altho' hopefully it may improve throttle response slightly) but hopefully should give the car a better voice. Our Euro/Austrailian (and possibly other markets) engines have exhausts with valves (both sport and normal non sport systems) and the ECU seems to keep the valves shut most of the time, the only time they open seems to be at high revs and wide throttle openings where maximum flow is needed to produce the 7XXhp. The American market cars have no valves.
There is some 720 exhaust chat on the thread below with pics where you can see the difference in valved and non valved systems.
https://www.pistonheads.com/gassing/topic.asp?h=0&f=242&t=1748320&i=20
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997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
2018 McLaren 720S
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.
Thanks for the information. What does it mean performance wise, american market have no valves vs eu cars having valves. Is there some disadvantige of our Eu cars with valves vs the non valves, or is it just the sound of the exhaust affected. One would think non valves exhaust have some more unrestricted airflow / and less backpressure
I think it will have no effect on performance the valves are open when the throttle is wide and boost is up so when you nail it you are getting the same exhaust as the US cars. If you listen to the vid below of US models normal v sport exhaust you can hear than even the normal is a lot noiser than our valved units, this kind of confused me when I picked my car up (with normal exhaust) as it was much quieter than this vid it took a while for me to fathom out the valve addition policy for our country's/EU noise regs.
https://www.youtube.com/watch?v=O0DAEl0fpq4
997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
2018 McLaren 720S
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.
BjoernB:isn't a certain backpressure good for torque ?
I did ponder the whole exhaust thing as it seems a bit weird to sell the same exhaust but just with valves to quieten it down for certain markets. If you look at the pics of the standard non sport system below you can see non valved US spec first then valved Euro spec they are exactly the same except for the valves.
From the pics it is obvious that when valves are open a high degree of gases can escape "straight out" without having to go through the muffler.
The theory is that some backpressure should be good for the engine when running off boost so theoretically the vlaved exhaust "should" have more off boost/low boost torque until the backpressure reaches a critical point where presumably the engineers have programmed the flaps to open and the free flow provides the best/highest power curve.
In reality I bet there is no difference
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997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
2018 McLaren 720S
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.
BjoernB:isn't a certain backpressure good for torque ?
Is that nor more the case on normal aspirated engine rather than on turbo engine, where you want to move the turbo as free as possible (quick spool up, quick response)
I thought that for example the akra exaust on the 991.1 Gt3 Rs had less power than the original one as of lake to a certain backpressure
So the pic above is the normal exhaust in non valved (US version) first pic and valved (Eu Version) second pic.
The Sports exhaust is below in US version non valved first pic and Euro version second pic with valves (they look slightly different in the pics below but I think one is upside down to the other)
poems by Aeschylus[url=https://imgbb.com/]
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997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
2018 McLaren 720S
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.
Interesting screenshot from the McLaren "720 engine" video, this is the sport exhaust on the engine dyno, is that with or without the valves ?
And the valved non sport version
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997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
2018 McLaren 720S
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.
https://www.youtube.com/watch?v=iQGg9NRun08
Quartermile Times:
10,1 s @ 141,5 mph - McLaren 720S
10,3 s @ 139,3 mph - Porsche 911 GT2 RS
10,4 s @ 134,5 mph - Lamborghini Huracán Performante
10,8 s @ 133,1 mph - Corvette ZR1
11,1 s @ 126,7 mph - BMW M5
11,8 s @ 116,1 mph - Alfa Romeo Stelvio Quadrifoglio
12,0 s @ 114,6 mph - Audi TT RS Coupé
12,1 s @ 116,3 mph - Aston Martin V8 Vantage
12,6 s @ 113,5 mph - Ford Mustang GT PP2
13,1 s @ 106,9 mph - Kia Stinger GT
13,7 s @ 105,9 mph - Honda Civic Type R
14,4 s @ 95,5 mph - Mazda MX-5 Miata
1/2 mile
That 720S is a monster..The thing has set the bar for straight line power, amazing.
throt
"I Have Done It!".
991 GT3 pick up in October 2014.
991 GT3.2 pick up April/May 2018. ( Hairy Chest Spec ).
Vauxhall Zafira 1.6 Exclusive pick up June 2013. ( Shit Box )
Rennteam Hairy Chest Advisor.
throt:That 720S is a monster..The thing has set the bar for straight line power, amazing.
McLaren does a great job when it comes to straight line performance, I never understood why the others (Porsche, Lambo, Ferrari) can't get even close. OK, the GT2 RS is a different beast but for a price.
RC (Germany) - Rennteam Editor Porsche 991.2 Carrera GTS Cabriolet (2018), Audi R8 V10 Plus (2016), Mercedes E63 S AMG Edition 1 (2018), Mini JCW (2015)
BjoernB:it's impressive in corners too - at least the 675LT
I think McLaren cars are amazing for the money they cost...the new 600LT seems to be a treat.
RC (Germany) - Rennteam Editor Porsche 991.2 Carrera GTS Cabriolet (2018), Audi R8 V10 Plus (2016), Mercedes E63 S AMG Edition 1 (2018), Mini JCW (2015)
Thanks for sharing, this is the first back to back with 720S and GT2RS, it's one thing reading the numbers but another watching the 720 leave the GT2RS for dead
997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
2018 McLaren 720S
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.
Sep 21, 2018 9:59:05 PM
Sep 22, 2018 12:23:55 AM
Sep 22, 2018 10:21:45 AM
CGX car nut:Laughing at Aston-Martin. Beaten by a saloon car, SUV, and VW Golf.
I see many Astons where I live and I always inwardly chuckle as the owners give them the beans and the cars make a huge roar as the they accelerate.........SLOWLY
997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
2018 McLaren 720S
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.
Sep 25, 2018 3:47:58 AM
Topspeed:https://www.youtube.com/watch?v=iQGg9NRun08
Quartermile Times:
10,1 s @ 141,5 mph - McLaren 720S
10,3 s @ 139,3 mph - Porsche 911 GT2 RS
10,4 s @ 134,5 mph - Lamborghini Huracán Performante
10,8 s @ 133,1 mph - Corvette ZR1
11,1 s @ 126,7 mph - BMW M5
11,8 s @ 116,1 mph - Alfa Romeo Stelvio Quadrifoglio
12,0 s @ 114,6 mph - Audi TT RS Coupé
12,1 s @ 116,3 mph - Aston Martin V8 Vantage
12,6 s @ 113,5 mph - Ford Mustang GT PP2
13,1 s @ 106,9 mph - Kia Stinger GT
13,7 s @ 105,9 mph - Honda Civic Type R
14,4 s @ 95,5 mph - Mazda MX-5 Miata
1/2 mile
- 720S - 15.7@170.9
- Performante - 16.3@160.4
- GT2 RS - 16.4@163.0
Except that if you watch the video, the Vantage time is actually 11.7.
Moser:It's crazy that a Porsche GT2RS is selling for well over 400k GBP in the UK and you can pick up a 720 S for low 200k's GBP......
Most people in the UK are treating the GT2RS as a collector car noone is putting any miles on them the C16 allocation was quite small and seems quite separate from other markets I guess this is what Porsche wanted for the UK and they've got it....... they have managed to dispose of many lifelong Porsche fans on the way but hey the new wave are buying and selling lots of stuff at the dealers and of course will carry on doing so right through the next interest rate rises and/or recession
997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
2018 McLaren 720S
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.