Chassis Stiffness Comparison
06-03-2015, 03:16 PM
#17
I like these technical subjects, they always lead to learning so many new things. Like this recently released research comparing chassis stiffness of many of today's hyper cars. Apologies in advance if it gets a bit technical, but you can always hit replay and repeat anything if its too hard the first time.
https://www.youtube.com/watch?v=p0lbJy61DcA
https://www.youtube.com/watch?v=p0lbJy61DcA
06-03-2015, 04:15 PM
#18
Rennlist Member
I like these technical subjects, they always lead to learning so many new things. Like this recently released research comparing chassis stiffness of many of today's hyper cars. Apologies in advance if it gets a bit technical, but you can always hit replay and repeat anything if its too hard the first time.
https://www.youtube.com/watch?v=p0lbJy61DcA
https://www.youtube.com/watch?v=p0lbJy61DcA
Those teeth. Yikes.
06-03-2015, 04:19 PM
#19
Rennlist Member
I believe that is wrong or the Cab. Porsche used 20% torsionally stiffer as a design target over the 997, has claimed "up to 25% stiffer"
some other info I found based on 911 model differences
'88 911 7k nm/deg (measurement by burgermeister)
964 11.5k nm/deg (993 was 20% stiffer)
993 13.9k nm/deg (996 was 45% stiffer)
996 20.1k nm/deg (Excellence was Expected p.1381)
996.2 25.1k nm/deg (996.2 was 25% stiffer)
997 33k nm/deg
991 40k nm/deg (porsche used 20% torsionally stiffer as a design target, has claimed "up to 25% stiffer")
also
Porsche 911 Turbo 996: 27k Nm/deg
Porsche 959 12.9k Nm/deg
Porsche Carrera GT - 26k Nm/deg
987 Boxster 16.5k NM/deg
981 Boxster 23k NM/deg (40% more)
987 Cayman 30k NM/deg
981 Cayman 40k NM/deg
some other info I found based on 911 model differences
'88 911 7k nm/deg (measurement by burgermeister)
964 11.5k nm/deg (993 was 20% stiffer)
993 13.9k nm/deg (996 was 45% stiffer)
996 20.1k nm/deg (Excellence was Expected p.1381)
996.2 25.1k nm/deg (996.2 was 25% stiffer)
997 33k nm/deg
991 40k nm/deg (porsche used 20% torsionally stiffer as a design target, has claimed "up to 25% stiffer")
also
Porsche 911 Turbo 996: 27k Nm/deg
Porsche 959 12.9k Nm/deg
Porsche Carrera GT - 26k Nm/deg
987 Boxster 16.5k NM/deg
981 Boxster 23k NM/deg (40% more)
987 Cayman 30k NM/deg
981 Cayman 40k NM/deg
Yes, in training, Porsche was quite vocal about the INCREASE in chassis rigidity for the new 991. I'll see if I can dig up that document.
Further, when we had the 2014 Tudor RSR in our garage, one of our experienced technicians observed that this was the first RSR he had ever seen that did not have obviously visible additional welding: The frame looked identical to the bone stock 991 Carrera chassis we see roll through here on a daily basis.
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slo_991 (07-24-2023)
06-03-2015, 05:44 PM
#20
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"Dynamic torsional stiffness has been increased up to 25 percent over its already impressive predecessor. Amazingly, this was achieved while shedding up to approximately 100 pounds (45 kg)."
Mike
