Limited Slip Diff
- Thread starter steves944
- Start date
Suffolk944
Moderator
IIRC only the 250 bhp Turbos had LSD's...
Nope, my 220 has one, they usually come fitted with an external oil cooler, you will see a coiled pipe with cooling fins mounted on the side of the diff, as an aside my 220 also has the front brake air ducting fitted both these and the diff are factory fitted as far as i can ascertain.
Diver944
Active member
The sticker in the boot and service book will have a number 220 listed in the Option codes if it has LSD
There's a list of all of them here:
http://www.cantonia.com/option_codes.html
Neil Haughey
New member
Quick way, it will be on the option codes, 220 I believe.
Longer way is to lift the back end and turn a wheel by hand, on an open diff the other wheel will turn in the opposite direction.
Longer way is to lift the back end and turn a wheel by hand, on an open diff the other wheel will turn in the opposite direction.
Suffolk944
Moderator
Well you live and learn ! [
]
Jon,
If you learn something new everyday it is no bad thing,went to a seminar tonight with the IET (Institute of Engineering and Technology) subject was the Astute Submarine, well cool if you are geeky with stuff like that..........I am !
Went to one some time ago which was about the Eurofighter given by the chief test pilot, Fascinating !!
BTW The new Astute has way more Engineering Expertise and Technology than the Space Shuttle, granted the space shuttle is now "old technology"
If you learn something new everyday it is no bad thing,went to a seminar tonight with the IET (Institute of Engineering and Technology) subject was the Astute Submarine, well cool if you are geeky with stuff like that..........I am !
Went to one some time ago which was about the Eurofighter given by the chief test pilot, Fascinating !!
BTW The new Astute has way more Engineering Expertise and Technology than the Space Shuttle, granted the space shuttle is now "old technology"
Neil Haughey
New member
Well Bae would say that, I used to do R&D for submarine sonar. Many systems on there are a massive undertaking and yes if added up to a whole its pretty crazy.
Did they give out one of those crazy stats about the amount of cabling?
Did they give out one of those crazy stats about the amount of cabling?
George Elliott
New member
James, that sounds really interesting, my young lad tells me a eurofighter is highly unstable aerodynamically, and only constant computer controlled corrections keep it flying straight.
Ref the LSD, there is a gearbox ref ID stamped on the casting as well as the 220 option code mentioned above (by far the easier of the two to see), but if the g/box diff are not original the code may be misleading.
Jon, If the car spins the inside wheel at a junction, its not fitted with a LSD. I have read a lot of guff about them wearing out, but none I have driven ever wore out. (944's, 964's, GT's) Thats not to say it does not wear, but the rate of wear is like the door hinges.
George
Ref the LSD, there is a gearbox ref ID stamped on the casting as well as the 220 option code mentioned above (by far the easier of the two to see), but if the g/box diff are not original the code may be misleading.
Jon, If the car spins the inside wheel at a junction, its not fitted with a LSD. I have read a lot of guff about them wearing out, but none I have driven ever wore out. (944's, 964's, GT's) Thats not to say it does not wear, but the rate of wear is like the door hinges.
George
That's true about unstability George in fact if they wanted they could do away with the pilot altogether and just let software do what was required, still an amazing bit of kit though, as is the 997 GT3RS but remeber it is the electronics that have gone onto the car that makes it possible to do what it can do.......................not as involving though, i went around Oulton in one shortly after getting out of a 964RS.
The old skool RS did it for me []
The old skool RS did it for me [
]
sawood12
New member
That's right as is the case with all of the latest fighters (F16's, F18's, SU27's etc). The aerodynamic centre (where the lift acts) is much further forward than the centre of gravity (where the weight acts) meaning the things are massively tail heave (sounds familiar!) and are impossible for a pilot to fly manually as hundreds of control surface inputs a second are required to simply keep the thing flying straight and level. So the pilot doesn't fly the aircraft, he just indicates where he wants to go and the aircraft flies itself. If the flight control system were to fail then the pilot would only have about 4 seconds to eject before the aircraft descends into an unrecoverable spin from which he (or she) could eject. However this inherent instability means you get outstanding manoeuvrability.
When I was about 14 I had a poster on my wall of the EURO FIGHTER. My uncle was the cheif designer at bae or as it was known at the time Brittish Areospace Ltd at Prestwick and he gave me the poster which was an official bit of Bae advertising .The Aircraft was at that time meant to be ready within 5 years . It took alot longer as I am now 41.When the plane came out and was shown on the news I could not believe it was the same one that I had had on my wall all thoose years ago.
Fascinating stuff - sort of a twin topic forum - I think the info about the Eurofighter is actually more interesting than my original question!
However, can an LS Diff not have en external oil cooler as the car I am looking at has neither the right sticker in the boot NOR the cooler.
The guy selling it assures me it has LSD as he had an exchange unit fitted some years ago
Guess I may have to find gravel carpark!
However, can an LS Diff not have en external oil cooler as the car I am looking at has neither the right sticker in the boot NOR the cooler.
The guy selling it assures me it has LSD as he had an exchange unit fitted some years ago
Guess I may have to find gravel carpark!
sawood12
New member
Not necessarily - you can spin up both wheels on with an open diff, especially on gravel. You can also powerslide an open diff'd car - it is more difficult but you can if both wheels break traction at the same time. The only way to check, apart from any option codes, is to lift the rear, turn a wheel and if the other wheel turns in the same direction it is an LSD - if in an opposite direction it will be in an open diff.
I believe (if I read the turbo garage manual correctly) Early turbos were fitted with LSD's without oil coolers as standard, and an oil cooled LSD box was an option. Then they went to open diffs in about '86/'87, then the Silver Rose had the oil cooled LSD diff before the 250 turbo came out with an oil cooled LSD box as standard.
The aircraft you saw at 14 would have been the prototype - fitted with Rolls-Royce RB199 engines (as fitted to the Tornado) and was a prototype to test the aircraft configuration and electronic systems. The irony is that the Aerospace industry, though having the reputation for cutting edge technology, in actual fact sports technology that is approximately 10yrs old at best due to the vast time it takes to prove these systems through extensive flight testing. A modern family car will be far more technologically advanced. A typical airliner takes at least 5 or 6yrs to bring to market from a blank sheet of paper and a military jet fighter will take upto and sometimes over 10yrs. I was working on the Eurofighter and A400M Hercules transport replacement projects as an apprentice with BAe in the early '90's, and the Eurofighter has only just come into service within the last 5 yrs or so and the A400M has only just started its test flying programme and wont enter service for years yet. As an example Carbon Fibre is only just finding its way into Airliners primary structures in the new Boeing 787 and Carbon Fibre is 40yr old technology now. Composite materials technology has now moved into Metal Matrix Composites, GLARE (glass Fibre reinforced Aluminium Alloys) and other even newer and stranger materials.
ORIGINAL: Frenchy
That's true about unstability George in fact if they wanted they could do away with the pilot altogether and just let software do what was required, still an amazing bit of kit though, as is the 997 GT3RS but remeber it is the electronics that have gone onto the car that makes it possible to do what it can do.......................not as involving though, i went around Oulton in one shortly after getting out of a 964RS.
The old skool RS did it for me [
I was there - was great! [
]
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