L.s.d Info Needed

[M_R_205 5 1 Cars]

well, wile my engines out im thinking of getting a limited slip diff, im always hearing about the plated type needing maintanence, what does this involve??? replacing the plates oiling greasing???

 

but to be honnest this is putting me off and im thinking of a quaife atb style diff, do they make a massive difference on take off wheel spin? im going to try get my hands on an omex rev limiter with launch controll to try and reduce spin as much as i can

 

and finaly whats the best place to buy a quaife unit? and what is the best sort of price, im sure i saw one somewhere for £450, i could be totaly wrong though....

[GTI6BOY 29]

Hi, they are all around £450+vat

 

Tran-x are a good make

 

If you thinking of any track use (drag/track) then you want a plate diff.

 

I have had my plate diff for 4 years and its used hard and i have had no probs with it.

 

If you had 1 wheel stuck in mud, with a plate diff the wheels would both turn the same time and you would get out, with an atb its a different story.

 

Another plus, if you brake a drive shaft with a plate diff you can still drive (i drove to the garage when mine broke). with an atb you cant do this.

 

If your not gonna race it, get an atb its more road friendly

[M_R_205 5 1 Cars]

what sort of miles did you put on the tran x im gona be using mine on the road and hopefully a cpl track days when i can but i do a few road miles about 1000 a month

Edited April 21, 2007 by M_R_205

[GTI6BOY 29]

I dont have a tran-x i have a ZF but i dont think you can get them anymore and as i need another im going for a tran-x as they have been highly recomended by a couple of peugeot companys

 

I do about 5000 miles a year and rag it off the lights all the time and down the strip

[Longfield 0]

I spoke with West Midlands Motorsport before buying my diff. Although the Quaiffe unit is popular in the 205 challenge, having spoken with WMMS about it I bought the Kaaz unit. It's fully rebuildable & customizable according to WMMS and they seemed to prefer it over the Quaife unit for track/circuit which is more expensive. So I plumped for the Kaaz. Other's who i emailed before buying this diff didn't seem to have a bad word to say about it either.

[James_R 3]

I run a 40% tran-X with 45/45 ramping I'll have it out in a couple of years for a check, but maintinace wise, you will need to pop it out eventually but they reckon every season for comp cars but they seem to regularly come back ok, as GTI6boy says you can run them for ages no hassle.

 

ATB's are good for the money and fit and forget, they are heavier though and if you lift a wheel (reads jump a kurb) on track you loose the bias and that can be interesting.

 

Comp boys run plates, I so went with that since they seem to know what works and what doesnt.

 

Worth speaking to Miles at PugRacing about them he's had a fair bit of experince.

 

As for plates being snatchy etc... I've found no difference to an ATB equipped car. I'm thinking of having mine re-ramped to 30/60 next time it's all apart.

 

James

[pdd144c 0]

Not all competiton cars run plated diffs James. If you think about comp cars they probably only do 450-600 miles a year, a road car will do loads more than that. I'll get back to you about that PM tomorrow...

 

The Quaife unit in my 205 TT was good for side stepping the clutch in 1st gear at high rpm with next to no wheel spin, so I wouldn't worry about launch control.

 

Paul.

[James_R 3]

Granted not everyone uses the same gear, but plates seem better.

 

As for miles and wear, think the "maintaince" and "you'll need power steering" is banned about too much on the interweb.

 

Bono's covered around 3000miles and was sentot be check came back saying it's still to from new spec, mines done about 800 trackmiles and another 3000road miles and no problems.

[pdd144c 0]

Every situation is different, with some plated race setups you will want PAS, although the average trackday/fast road setup up may not require it.

 

Maintenance wise they all tend to last longer than most people think, but on a daily driver they will need looking at sooner than a trackday toy time wise.

[zeolite 0]

Nobody else run a Gripper?

It is a handful at car park speeds and I wouldn't recommend one for a road car.

[James_R 3]

is yours a 40% or 90% plate set up?

 

I find full lock low speeds you can hear the CV's being loaded up by the diff and makes some "nice" noises

[chownr 0]

Ive run an ATB in my rally car for about 3 years. Fit and forget and never had a problem with it - probably did about 5000 miles in 3 years with it. Over the winter I was offered a gripper diff at a price I couldnt refuse. Rebuilt it (about £30 for a set of plates or Tom at Gripper will do a full service incl plates and shipping for about £70 + vat) and put it into my box (remember you need to grind some gearbox and diff casing away for any plate diff to fit). I was surpirsed by the low speed noise with any lock applied that you get from the plate diff (sounds like CV joint noise). This improved once the plates bedded in but still evident. I changed the oil after about 150 miles to flush out material from plates bedding in and changed back to std Pug 75w80 oil. Much less noise from the diff (none when the oil warms up) compared to running expensive fully synthetic oil.

 

As for performance not really noticeable difference between the two. However the plate diff does provide traction if lift a wheel or completely lose traction. The plate diff is maybe a bit better under braking as well but there isnt a significant difference.

 

My conclusion is that for a track/rally car that does relatively few miles and undergoes regular maintenance then the plate diff has a small advantage over the ATB (and I mean small). For an everyday car or one that does quite a lot of miles I would go ATB every time.

 

My thoughts

 

Rich

[Batfink 201]

Ive run an ATB in my rally car for about 3 years. Fit and forget and never had a problem with it - probably did about 5000 miles in 3 years with it. Over the winter I was offered a gripper diff at a price I couldnt refuse. Rebuilt it (about £30 for a set of plates or Tom at Gripper will do a full service incl plates and shipping for about £70 + vat) and put it into my box (remember you need to grind some gearbox and diff casing away for any plate diff to fit). I was surpirsed by the low speed noise with any lock applied that you get from the plate diff (sounds like CV joint noise). This improved once the plates bedded in but still evident. I changed the oil after about 150 miles to flush out material from plates bedding in and changed back to std Pug 75w80 oil. Much less noise from the diff (none when the oil warms up) compared to running expensive fully synthetic oil.

 

As for performance not really noticeable difference between the two. However the plate diff does provide traction if lift a wheel or completely lose traction. The plate diff is maybe a bit better under braking as well but there isnt a significant difference.

 

My conclusion is that for a track/rally car that does relatively few miles and undergoes regular maintenance then the plate diff has a small advantage over the ATB (and I mean small). For an everyday car or one that does quite a lot of miles I would go ATB every time.

 

My thoughts

 

Rich

 

good advice there

[M_R_205 5 1 Cars]

well after reading all the advice given and driveing a red top nova with a plated diff on thursdsay i have decided to go for a quaiffe jobbie, the plated thing made the steering insanley heavy when trying to park, and the kid who lent me the car said he has alredy had to get it serviced after about 12000 miles!! however when i took off i got considrebly less wheelspin than i was expecting i didnt realised how much of a difference they made,

thanks for the advice all

im gona order it on tuesday, cant wait :D

Edited April 28, 2007 by M_R_205