The Cheese Posted July 8, 2016 Share Posted July 8, 2016 When I bought my Westfield I was told it had a road race lsd in it but it clangs a lot and is very difficult to turn on slow corners and feels like it's pushing round corners I believe it to be a Sierra lsd but I've never known one to be this limited Anyone know any specialists in Yorkshire Quote Link to comment Share on other sites More sharing options...
Stevec33 Posted July 8, 2016 Share Posted July 8, 2016 Its probably what's known as a gripper plated diff, they can be quite harsh at low speeds. There is a company called bara motorsport in Birmingham who deal with these a lot amd may be worth you talking to Quote Link to comment Share on other sites More sharing options...
The Cheese Posted July 8, 2016 Author Share Posted July 8, 2016 Its probably what's known as a gripper plated diff, they can be quite harsh at low speeds. There is a company called bara motorsport in Birmingham who deal with these a lot amd may be worth you talking to Quote Link to comment Share on other sites More sharing options...
The Cheese Posted July 8, 2016 Author Share Posted July 8, 2016 Cheers Steve it is a plated diff which I feel is too strong for at its current setting but I will see how I go Road and race transmissions say they can ease it off a bit for me if I send it down Quote Link to comment Share on other sites More sharing options...
Stevec33 Posted July 8, 2016 Share Posted July 8, 2016 A mate of mine has one in a sierra cosworth, they have done different versions over the years and they have got more refined he says, he's had one in there for probably 5-6 years and it was very harsh as you describe, but he broke it recently and they replaced it with their latest spec one and it's much better aparantley Quote Link to comment Share on other sites More sharing options...
Dave_B123 Posted July 10, 2016 Share Posted July 10, 2016 I have a plated gripper in mine and its a nightmare at low speeds and does feel like it wants to push on round tighter corners, however it is fantastic on track Quote Link to comment Share on other sites More sharing options...
The Cheese Posted July 11, 2016 Author Share Posted July 11, 2016 Yes I've just never heard chatter or clanging from a diff Thought it was knackered to be honest Quote Link to comment Share on other sites More sharing options...
Badger56 Posted July 13, 2016 Share Posted July 13, 2016 Hi, if you're still looking for an expert I can recomend Central Axles Web site ast :- http://www.centralaxles.com really helpful with the dif on my Seight not so long ago, bit of a distance for you maybe but probably worth a phone call? Quote Link to comment Share on other sites More sharing options...
DamperMan Posted July 13, 2016 Share Posted July 13, 2016 I had a plated jag diff in a scimitar. It would make a whole manner of mechanical noises and would struggle with tight turns. Yet in a xj6 where it's all rubber mounted and the cars heavier there quite refined. A recent drive in a e46 m3 and I was reminded how unrefined plated diffs can be. I'm just trying to say they are not particularly refined especially when in a kitcar. Basically the diff is locked until enought torque between the 2 wheels overcomes the preloaded stiction/ friction between the plates allowing one wheel to turn more than another. Further to that the loading on the plates and there for slip torque increases as more power is applied and that's controlled with ramp angles. Check it has the correct oil in it first it's not 80w-90. That changes the smoothness of the slip considerably but it takes a little time for the new oil to fully get between the plates so the improvement might not be instant. The way they are set up for different weighted cars and different uses will affect their refinement a lot. Quote Link to comment Share on other sites More sharing options...
Thrustyjust Posted July 13, 2016 Share Posted July 13, 2016 I went out in a focus ST with mega hp and had a plated diff and when he turned out the parking spot, I thought someone had dropped the crockery cupboard on the floor and the front of the car clunked, skipped and was quite a weird experience . He reckoned it needed unwinding a bit , but in a straight line, it felt no different to normal. Quote Link to comment Share on other sites More sharing options...
The Cheese Posted July 14, 2016 Author Share Posted July 14, 2016 cheers guys, I will take it out in winter and have it sorted by one of your reccomendations failing that I will put a cosworth 2wd lsd 3.6 in it Quote Link to comment Share on other sites More sharing options...
The Cheese Posted July 21, 2016 Author Share Posted July 21, 2016 right guys I've found out my diff is ratio'd 3.92 so I'm swapping it for a cosworth lsd to get away from the scary road driving,i feel its too harsh for my westie i know road and race transmissions are excellent at producing these but feel its better going balls out on a track which i will only do a few times a year and will probably enjoy driving on country blast a bit more, at least i will be able to go round bends without being pushed, it feels as though i compromise handling for grip or maybe its just my lack of experience ,anyway I'm going to try a normal lsd ,people i have spoken to say plated diffs are for track and not good for road going so I'm looking for best of both worlds ,is this the right way to go what do you think? any advice appreciated Quote Link to comment Share on other sites More sharing options...
Oily Steve Posted July 22, 2016 Share Posted July 22, 2016 For a few years I had a 3.92 open Sierra diff but I have recently fitted a 3.62 Sierra LSD which I believe is the viscous type. My experience to date of a few road miles and the WSCC Blyton track day a couple of weeks ago, has been good so far. The LSD seems to be quite progressive in operation and although I can't tell much difference on the road, it did seem to have a bit more traction on track. My only thought now is whether it would have been better to try to find an LSD with the same ratio I had before i.e. 3.92. Quote Link to comment Share on other sites More sharing options...
KevB Posted July 23, 2016 Share Posted July 23, 2016 To get the best of both worlds you could consider rebuilding your current diff with a Quaife Auto Torque Biasing (ATB) unit. On the road it behaves like a standard open diff and then on the track like a plated diff. The sell your plated diff to recover some cost No plates to wear out or continually adjust, works with helical gears. http://www.nolimitmotorsport.com/quaife/ Quote Link to comment Share on other sites More sharing options...
Terryathome Posted July 23, 2016 Share Posted July 23, 2016 Stay with the plated but rocking horse springs to mind and you will problem have to get it overhauled which adds to the cost. 1 Quote Link to comment Share on other sites More sharing options...
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