959 AWD?
09-10-2016, 05:13 PM
#1
959 AWD?
I have been looking around for an explanation to this but can't seem to find it.
Not sure where to look, is it considered air cooled or water cooled? No, no, JK.
The 959 is described as having"Driver Selectable Torque Split AWD". Could someone explain this functionality, the range of selection etc. or point me where I might learn about this? Has another Porsche or any other car employed this?
Not sure where to look, is it considered air cooled or water cooled? No, no, JK.
The 959 is described as having"Driver Selectable Torque Split AWD". Could someone explain this functionality, the range of selection etc. or point me where I might learn about this? Has another Porsche or any other car employed this?
09-10-2016, 06:22 PM
#2
Pretty sure a Google search on, "Driver Selectable Torque Split AWD" will produce all the reading info you'll want and then some! ; )
I'm thinking the configuration is a hybrid of sorts with the powerplant, a twin-turbocharged six-cylinder boxer engine with air-cooled cylinders and water-cooled heads.
I'm thinking the configuration is a hybrid of sorts with the powerplant, a twin-turbocharged six-cylinder boxer engine with air-cooled cylinders and water-cooled heads.
09-10-2016, 09:31 PM
#3
Three Wheelin'
You may want to ask on the 964 forum, as I have read parts of its AWD system were inspired by the 959.
Here's a detailed pdf on the 964 system, but I don't have enough 959 knowledge to know what components were similar between it and the 959 AWD system.
http://www.adrianstreather.com/docs/...overviewR2.pdf
Here's a detailed pdf on the 964 system, but I don't have enough 959 knowledge to know what components were similar between it and the 959 AWD system.
http://www.adrianstreather.com/docs/...overviewR2.pdf
09-10-2016, 09:42 PM
#4
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09-10-2016, 09:54 PM
#5
The 959 is partially watercooled - the heads have water cooling. The 956/962 and 993/996 GT1 use a similar setup.
The 964 might have some ties to the 959 AWD system, but it is not the same. The 959 system is more similar to the 953's system as I understand it. IIRC the 959 has three pre-programmed settings: dry, wet, and low traction (i.e. snow).
The adjustment probably varies the bias and possibly lock in the center differential, and perhaps lock up in rear diff. Not sure what the front and rear diffs are; Torsen, mechanical locking, etc.
If you post in the 959 thread in the supercar forum, they can probably explain things in more depth.
https://rennlist.com/forums/porsche-...demand-15.html
Early Audis allow the driver to manually lock the center and rear differentials. This technically isn't changing any torque split, but instead holds it at 50:50. After that generation (quattro I) the center differential operates on its own.
Most trucks for a long time had lots of driver adjustment.
Wonder what Jensen Healey used.
Today all AWD systems are fully computer controlled.
The 964 might have some ties to the 959 AWD system, but it is not the same. The 959 system is more similar to the 953's system as I understand it. IIRC the 959 has three pre-programmed settings: dry, wet, and low traction (i.e. snow).
The adjustment probably varies the bias and possibly lock in the center differential, and perhaps lock up in rear diff. Not sure what the front and rear diffs are; Torsen, mechanical locking, etc.
If you post in the 959 thread in the supercar forum, they can probably explain things in more depth.
https://rennlist.com/forums/porsche-...demand-15.html
Early Audis allow the driver to manually lock the center and rear differentials. This technically isn't changing any torque split, but instead holds it at 50:50. After that generation (quattro I) the center differential operates on its own.
Most trucks for a long time had lots of driver adjustment.
Wonder what Jensen Healey used.
Today all AWD systems are fully computer controlled.
Last edited by FrenchToast; 09-10-2016 at 10:12 PM.
09-11-2016, 01:47 AM
#6
The 959 is partially watercooled - the heads have water cooling. The 956/962 and 993/996 GT1 use a similar setup.
The 964 might have some ties to the 959 AWD system, but it is not the same. The 959 system is more similar to the 953's system as I understand it. IIRC the 959 has three pre-programmed settings: dry, wet, and low traction (i.e. snow).
The adjustment probably varies the bias and possibly lock in the center differential, and perhaps lock up in rear diff. Not sure what the front and rear diffs are; Torsen, mechanical locking, etc.
If you post in the 959 thread in the supercar forum, they can probably explain things in more depth.
https://rennlist.com/forums/porsche-...demand-15.html
Early Audis allow the driver to manually lock the center and rear differentials. This technically isn't changing any torque split, but instead holds it at 50:50. After that generation (quattro I) the center differential operates on its own.
...
Today all AWD systems are fully computer controlled.
The 964 might have some ties to the 959 AWD system, but it is not the same. The 959 system is more similar to the 953's system as I understand it. IIRC the 959 has three pre-programmed settings: dry, wet, and low traction (i.e. snow).
The adjustment probably varies the bias and possibly lock in the center differential, and perhaps lock up in rear diff. Not sure what the front and rear diffs are; Torsen, mechanical locking, etc.
If you post in the 959 thread in the supercar forum, they can probably explain things in more depth.
https://rennlist.com/forums/porsche-...demand-15.html
Early Audis allow the driver to manually lock the center and rear differentials. This technically isn't changing any torque split, but instead holds it at 50:50. After that generation (quattro I) the center differential operates on its own.
...
Today all AWD systems are fully computer controlled.
I'm positive now that a friend of mine swa Motorweek before I did and was yanking my chain, semi-quizzing me. All me searches so far are presser ads or rennlist posts that are 42 pages and before I tag on...well chastise me for not tagging on.
We were getting on about how the computers terminate into mechanicals of some sort...down to the clutch and axle...sure-grip vs. traklok.
air lockers vs electro hubs vs viscous couplings and finned pig torque converters.Im thinking of a bar bet, How many clutches are in a 959?
09-11-2016, 10:57 AM
#7
There's a book called Carrera 4 Porsche Allrad that explains it all from the earliest technology through the 953, 959, and 964 carrera 4
https://www.amazon.com/Carrera-Porsc.../dp/351701124X
https://www.amazon.com/Carrera-Porsc.../dp/351701124X