Nov 7, 2017 12:30:01 AM
Finally got my answer:
“We are at a disadvantage compared with some competitors because our engine is right at the rear of the car,” Preuninger says. “We have to bring air back there in enough quantity to make 700 hp, and you need a lot of oxygen for that.”
To help, the scoops on the engine cover lead to a new airbox with five tubular filter elements that offer the maximum surface area for the size of package and deliver 15 to 20 percent more airflow. The intercoolers are 15 percent bigger and sit lower in the car, and a system that sprays water on the intercooler matrix when intake air temperatures exceed 122 degrees F, with 90 percent throttle openings, can reduce intake air temperature by as much as 68 degrees.
Preuninger says early in the GT2 RS’ development, the powertrain engineers figured the system would be worth looking at if it showed a reduction of 40 degrees, and they were stunned when testing showed reductions of up to 60 degrees. “It’s a real example of how you can’t calculate everything,” he says. “You have to try stuff out.”
The water spray system is fed by a 1.3-gallon tank, and because of its extreme operating parameters, Preuninger says it won’t often need refilling. If it does run dry, the engine management system simply dials back the available power. Refilling the tank, which is mounted in the trunk and easily accessible, is as easy as buying a bottle of distilled water
Nov 7, 2017 9:17:56 AM
Nov 7, 2017 9:54:19 AM
Nov 7, 2017 10:13:44 AM
Nov 7, 2017 12:51:58 PM
Nov 7, 2017 1:03:27 PM
kingjr9000:Finally got my answer:
“We are at a disadvantage compared with some competitors because our engine is right at the rear of the car,” Preuninger says. “We have to bring air back there in enough quantity to make 700 hp, and you need a lot of oxygen for that.”
To help, the scoops on the engine cover lead to a new airbox with five tubular filter elements that offer the maximum surface area for the size of package and deliver 15 to 20 percent more airflow. The intercoolers are 15 percent bigger and sit lower in the car, and a system that sprays water on the intercooler matrix when intake air temperatures exceed 122 degrees F, with 90 percent throttle openings, can reduce intake air temperature by as much as 68 degrees.
Preuninger says early in the GT2 RS’ development, the powertrain engineers figured the system would be worth looking at if it showed a reduction of 40 degrees, and they were stunned when testing showed reductions of up to 60 degrees. “It’s a real example of how you can’t calculate everything,” he says. “You have to try stuff out.”
The water spray system is fed by a 1.3-gallon tank, and because of its extreme operating parameters, Preuninger says it won’t often need refilling. If it does run dry, the engine management system simply dials back the available power. Refilling the tank, which is mounted in the trunk and easily accessible, is as easy as buying a bottle of distilled water
Plus
BiTurbo:
The guy in this vid seems to calculate that the car will weigh 1440kg in Weissach trim but I think that is wrong.
Porsche said 1470kg is the DIN weight for an unoptioned car so add in cage and PCM and what not must get you up to ~1500kg and the Weissach pack saves 30kg on this weight since one of the big savings is the Ti cage vs the clubsport cage - do I have this correct ?
997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN
There is an unstated rule thumb for car manufacturers when introducing a new model to the public. They present it in the color they believe puts it in its most attractive light. What color did Porsche use for its introduction model? Go with that.
Don’t go with Black. That is the color they use to hide the lines of test models.
--
"A man wrapped up in himself makes for a very small bundle."
nberry:There is an unstated rule thumb for car manufacturers when introducing a new model to the public. They present it in the color they believe puts it in its most attractive light. What color did Porsche use for its introduction model? Go with that.
Don’t go with Black. That is the color they use to hide the lines of test models.
Yet in many cases they're wrong...
Most just present in a color that makes sense. Ferrari are red, Porsche are silver, McLaren are orange. These are more or less company colors. Sometimes they introduce a car in a new color simply to show of a new color.
TB993tt:BiTurbo:The guy in this vid seems to calculate that the car will weigh 1440kg in Weissach trim but I think that is wrong.
Porsche said 1470kg is the DIN weight for an unoptioned car so add in cage and PCM and what not must get you up to ~1500kg and the Weissach pack saves 30kg on this weight since one of the big savings is the Ti cage vs the clubsport cage - do I have this correct ?
Sounds right according to the official spec
991.2 GT3
Unlike BMW where the water is injected into the intake of the engine, I would think the quality of the water is far less important here (just sprays onto the outside of the IC). Maybe regular water with some small amount of additive to reduce calcium deposits would be fine...
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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:Unlike BMW where the water is injected into the intake of the engine, I would think the quality of the water is far less important here (just sprays onto the outside of the IC). Maybe regular water with some small amount of additive to reduce calcium deposits would be fine...
-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, I was making a joke
Nov 8, 2017 1:58:12 AM
bluelines:964C2:Grant, I was making a joke
This is RT. Serious people. Never make a joke without a smiley.
Hahaha, especially when referring to a ""Hairy Chest"" ..
You guys are a disgrace. I have not posted for ages and all you lot have done is talk about Porsche's and exterior colour choices. Come on guys, lighten up. ..
throt
"I Have Done It!".
991 GT3 pick up in October 2014.
Rennteam Hairy Chest Advisor.
https://www.autoblog.com/2017/11/06/2018-porsche-911-gt2-rs-first-drive-review/#slide-7145758
2500 units...
"Interestingly, its 211 mph top speed was electronically limited due to the tires. Porsche engineers say the fully uncorked drivetrain could hit 220 mph."
Wooo...
M4n0t0:https://www.autoblog.com/2017/11/06/2018-porsche-911-gt2-rs-first-drive-review/#slide-7145758
2500 units...
"Interestingly, its 211 mph top speed was electronically limited due to the tires. Porsche engineers say the fully uncorked drivetrain could hit 220 mph."
Wooo...
Some real BS in that review, I mean really
Preuninger went old school to create that elusive difference: he dug into the Porsche museum collection and put a 1970s-era 935 Turbo and several turbocharged racecars on a lift, measuring things like intake runner lengths and the header diameters. The findings helped shape the GT2 RS's inimitable howl.
997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar
993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN
TB993tt:Preuninger went old school to create that elusive difference: he dug into the Porsche museum collection and put a 1970s-era 935 Turbo and several turbocharged racecars on a lift, measuring things like intake runner lengths and the header diameters. The findings helped shape the GT2 RS's inimitable howl.
2017 991.2 Carrera 4 GTS | GT Silver Metallic - The GT3 Killah!
2013 Audi S3 | Glacier White