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    Re: McLaren on a winning streak

    ALDO:

    Weight is linear - no formula with m2 or so

    a=2*m/s*s

    m= mass, s=time, a=accel

    Fl=(A*q*v2*Cw)/2

    A=area

    q=dense of air (1,3 kg/m3)

    v=velocity

    Fl=force due to drag

    do your math

    As I said we don't have the numbers for A or Cw Smiley


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    997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar

    McLaren 570S 

    993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.


    Re: McLaren on a winning streak

    I just want to say, that for the acceleration the main factor is not the weight rather then then Fl which depends on v*v. 


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    AM


    Re: McLaren on a winning streak

    TB993tt:

    720S which did 0-300 in 19.4s was weighed during the Supertest full of fuel and came out at 1425kg thats 3141lbs.

    The 675LT which also did a Supertest weighed 1361kg so 3000lbs.

    570S is supposed to weigh DIN at 1440kg 3174kg with the Spider being 46kg heavier.

     

    Ah good to know, finally Mclaren is not lying for once.

     


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    Re: McLaren on a winning streak

    Whoopsy:
    Ah good to know, finally Mclaren is not lying for once.

     

    I think you are probably correct about customer cars, the 720S tested at 1425kg had the fixed buckets -15kg and I presume no front lifter, customer cars will likely be pushing 1500kg with the full options, top end sound, lifter, normal seats with electric and heating, electric steering column etc...

    This is always the way, the 997GT2RS was listed at 1370kg DIN but most customer cars came in at 1450 odd kg, even the one given to Sportauto to test was at 1405kg and that was a factory low option test car !


    --

     

     

    997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar

    McLaren 570S 

    993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.


    Re: McLaren on a winning streak

    TB993tt:
    MKSGR:

    No - they calculated a time difference of 1.5s (between 200 and 300 kph) resulting from the weight disadvantage of the turbo s alone (!). Weight is of significant relevance in high speed ranges, I learned during the discussion of these calculations, didn't expect this outcome based on physics and mathematics either Smiley

    Can you give us an idea of the calculation, the weight difference between Turbo S and 570S is about 150kg ?

    I would have thought the drag would be more/as significant in this range and I don't think we know the 570S numbers Smiley

    Please see posts 39 and following (in German, unfortunately):

    https://www.pff.de/porsche/index.php?thread/2771943-vergleich-der-dampfhammer-turbo-s-vs-mclaren-570-s-vs-r8-v10-plus/&pageNo=1

    Smiley

     


    Re: McLaren on a winning streak

    Whoopsy:
    TB993tt:

    720S which did 0-300 in 19.4s was weighed during the Supertest full of fuel and came out at 1425kg thats 3141lbs.

    The 675LT which also did a Supertest weighed 1361kg so 3000lbs.

    570S is supposed to weigh DIN at 1440kg 3174kg with the Spider being 46kg heavier.

     

    Ah good to know, finally Mclaren is not lying for once.

     

    When have the lied? Their cars have been weighed many times and they are always quite light and close to claimed weights.


    Re: McLaren on a winning streak

    ALDO:

    I just want to say, that for the acceleration the main factor is not the weight rather then then Fl which depends on v*v. 

    Smiley


    --

    RC (Germany) - Rennteam Editor Porsche 991.2 Carrera GTS Cabriolet (2018), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)


    Re: McLaren on a winning streak

    There are ways to cheat without really cheating, at least not something people could verify, unless they do some extensive dyno AND emissions testing. angry

    All manufacturers cook with water and when weight and power figures are comparable and performances are substantially higher in a speed range where weight shouldn't play that much of a role anymore, well... 

    Like I said, I do not want to imply anything but the performance in the 100 to 300 kph speed range is, to say at least, interesting.


    --

    RC (Germany) - Rennteam Editor Porsche 991.2 Carrera GTS Cabriolet (2018), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)


    Re: McLaren on a winning streak

    My first post here, very interesting to read.

    Concerning weight and acceleration i do think weight counts. 2 trucks same enging etc one loaded other one not, wich one would be hypotheticaly faster 200-300kmh. Same with braking time/distance.

    I think Mclarens are pretty light cars concerning there competition and that helps as well as the slighty underrated engine


    Re: McLaren on a winning streak

    RC:

    There are ways to cheat without really cheating, at least not something people could verify, unless they do some extensive dyno AND emissions testing. angry

    All manufacturers cook with water and when weight and power figures are comparable and performances are substantially higher in a speed range where weight shouldn't play that much of a role anymore, well... 

    Like I said, I do not want to imply anything but the performance in the 100 to 300 kph speed range is, to say at least, interesting.

    Drove a regular 720s myself - based on this I have no doubt that the customer cars are indeed as quick as written in the magazines. The difference to the turbo s class can be felt immediately (above 200kph). The 720s has a lot more power Smiley


    Re: McLaren on a winning streak

    Worthy of mention is the AB test of the 570S with Race chip tuning box with claimed 676PS/795NM.

    The car tested at 0-300 in 21.3s and 200-300 in 13.2s compared to 16.2s for the factory car.

    It is unlikely that the Racechip could develop more than the quoted 676PS. 0-300 in 21.3s is outrageously fast for just 676PS.....I am thinking that the 570S is a particularly slippery shape, the Cd number to be found online says 0.32 but there does not seem a reliable source where this number came from. With its skinny tyres, highly raked screen and extreme focus on airflow (have a read of link below) I wouldn't be surprised if the 570S had a very low CdA number which contributes massively to its high speed acceleration  

    http://www.motortrend.com/news/2016-mclaren-570s-first-look/

    Racechip Numbers in link below.

    http://www.autobild.de/artikel/supersportler-im-extremsprint-test-12093881.html


    --

     

     

    997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar

    McLaren 570S 

    993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.


    Re: McLaren on a winning streak

    Weight definitely matters when you're looking at acceleration. If you were just looking at top speed, then no, power matters most. If you're looking at a rate of acceleration though, weight definitely matters.


    Re: McLaren on a winning streak

    TB993tt:

    Worthy of mention is the AB test of the 570S with Race chip tuning box with claimed 676PS/795NM.

    The car tested at 0-300 in 21.3s and 200-300 in 13.2s compared to 16.2s for the factory car.

    It is unlikely that the Racechip could develop more than the quoted 676PS. 0-300 in 21.3s is outrageously fast for just 676PS.....I am thinking that the 570S is a particularly slippery shape, the Cd number to be found online says 0.32 but there does not seem a reliable source where this number came from. With its skinny tyres, highly raked screen and extreme focus on airflow (have a read of link below) I wouldn't be surprised if the 570S had a very low CdA number which contributes massively to its high speed acceleration  

    http://www.motortrend.com/news/2016-mclaren-570s-first-look/

    Racechip Numbers in link below.

    http://www.autobild.de/artikel/supersportler-im-extremsprint-test-12093881.html

    Wich is about inline with the ABSC supertest of the 675lt 0-300kmh im 22,4 sec in stock trim but running way more downforce than the 570s


    Re: McLaren on a winning streak

    noone1:
    Whoopsy:
    TB993tt:

    720S which did 0-300 in 19.4s was weighed during the Supertest full of fuel and came out at 1425kg thats 3141lbs.

    The 675LT which also did a Supertest weighed 1361kg so 3000lbs.

    570S is supposed to weigh DIN at 1440kg 3174kg with the Spider being 46kg heavier.

     

    Ah good to know, finally Mclaren is not lying for once.

     

    When have the lied? Their cars have been weighed many times and they are always quite light and close to claimed weights.

     

    Don't have to look too far back in their history. P1. I l believe the world have yet to find a customer car that weight less than 3500lbs in street trim. Which, by the way is a good 3-400lbs heavier than what McLaren claimed the car will be. 

    McLaren, like Ferrari, like to list DRY weight, which by itself is already around 120kg less than DIN weight, cause of all the fluids. Think someone told me before when McLaren weight their P1 for the dry weight, they even take out the air cleaner and spark plugs and oil filter. 

    Then they also like to quote cars with every single lightweight options, which is close to impossible for a customer to spec them all. 

     


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    Re: McLaren on a winning streak

    You still got a hard-on for the P1. We get it. Every other McLaren has been a lightweight and close to expected numbers. Tons of people have weighed them.


    Re: McLaren on a winning streak

    noone1:

    You still got a hard-on for the P1. We get it. Every other McLaren has been a lightweight and close to expected numbers. Tons of people have weighed them.

     

    Everything else is close to the published weight except the P3 Smiley


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    Re: McLaren on a winning streak

    TB993tt:
    martini964:

    Oh Toby, Did you sold your 993?????

    I did indeed I had one serious punter on it and I was extremely happy to sell it to him, he was very knowledable knew all about RS Tuning and the modifications and intended to carry on "hot rodding" it, he paid me what I asked which I thought was quite fair and I am glad the car will now actually be used and with someone with the finances to maintain in and the passion and knowledge to really enjoy it.

    His instagram feed is below, you can see he has already started improving the interior.

    https://www.instagram.com/blackbettyandco/

    Oh, thats Frank,lol. I knew him well. good its in his hand, wish I knew it tho


    Re: McLaren on a winning streak

    McLaren Senna in Victory Grey, 1200 kg, 800kg of downforce, 0-200km/h in 6.8s, 0-300km/h in 17.5s. Supposedly limits downforce at 155 mph because it creates more downforce than the suspension can deal with.

    https://www.youtube.com/watch?time_continue=1739&v=yMbnNycJ440


    Re: McLaren on a winning streak

    noone1:

    McLaren Senna in Victory Grey, 1200 kg, 800kg of downforce, 0-200km/h in 6.8s, 0-300km/h in 17.5s. Supposedly limits downforce at 155 mph because it creates more downforce than the suspension can deal with.

    https://www.youtube.com/watch?time_continue=1739&v=yMbnNycJ440

    Video fromm a serious car journalist (Henry Catchpole)

    https://www.youtube.com/watch?v=-lv1VCL2Fi4

    The car looks far better in this spec. Rear hindquarters and side on view are still challenging. Proof of the pudding will be in track times though.


    Re: McLaren on a winning streak

    crayphile:
    noone1:

    McLaren Senna in Victory Grey, 1200 kg, 800kg of downforce, 0-200km/h in 6.8s, 0-300km/h in 17.5s. Supposedly limits downforce at 155 mph because it creates more downforce than the suspension can deal with.

    https://www.youtube.com/watch?time_continue=1739&v=yMbnNycJ440

    Video fromm a serious car journalist (Henry Catchpole)

    https://www.youtube.com/watch?v=-lv1VCL2Fi4

    The car looks far better in this spec. Rear hindquarters and side on view are still challenging. Proof of the pudding will be in track times though.

    What could you have against that screaming person? Smiley


    --

    1992 Mercedes-Benz W124 500E  / 2008 Porsche 911 GT3 RS (sold) / 2011 Mercedes-Benz C63 AMG Performance / 2014 BMW-Alpina D3 biturbo Touring / 2018 Porsche 911 GT3 Clubsport


    Re: McLaren on a winning streak

    Porker:
    What could you have against that screaming person? Smiley

    SmileySmiley. Here is one from Evo   https://www.youtube.com/watch?v=tf2gLZBxmXY

     


    Re: McLaren on a winning streak

    Impressive piece of engineering, it looks nice in that color.


    Re: McLaren on a winning streak

    https://www.youtube.com/watch?v=vjV_0sEnG98

    enlightenedheart


    Re: McLaren on a winning streak

    Wtf


    Re: McLaren on a winning streak

    That's the Netherlands... angrysmiley


    --

    We're at the point where you can be the fastest or just sound like you're the fastest.



    The secret of life is to admire without desiring.


    Re: McLaren on a winning streak

    Video has been removed, can someone tell me what happened in the video?


    --

    RC (Germany) - Rennteam Editor Porsche 991.2 Carrera GTS Cabriolet (2018), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)


    Re: McLaren on a winning streak

    It looked like they were trying to navigate the 720 through a rock crawling course.


    Re: McLaren on a winning streak

    RC:

    Video has been removed, can someone tell me what happened in the video?

    https://www.youtube.com/watch?v=kD-J8nQWY3M

     


    Re: McLaren on a winning streak

    Topspeed:
    RC:

    Video has been removed, can someone tell me what happened in the video?

    https://www.youtube.com/watch?v=kD-J8nQWY3M

     

    Thank you. Ouch. Smiley


    --

    RC (Germany) - Rennteam Editor Porsche 991.2 Carrera GTS Cabriolet (2018), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)


    Re: McLaren on a winning streak

    RC:
    Topspeed:
    RC:

    Video has been removed, can someone tell me what happened in the video?

    https://www.youtube.com/watch?v=kD-J8nQWY3M

     

    Thank you. Dutch. Smiley


    Corrected that for you. SmileySmiley


    --

    We're at the point where you can be the fastest or just sound like you're the fastest.



    The secret of life is to admire without desiring.


     
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