LSD on a Cupra R

Sparkie · Aug 16, 2017

So with the extra power from a map I aim to have shortly, a limited slip dif looks like a great, though expensive mod.
With the car running about 265 to 270 horses, I would like to think it would greatly reduce torque bounce and some of the under steer exiting corners.
As it's an Expensive bit of kit, reducing labour costs would be an advantage.
Not being a tecky I wouldn't know where exactly it bolts on.
Is there a good time to do it?
As in, when doing a new clutch, or similar, or is it just suck it up and do it?
I've seen a quaife diff.
What other parts will need ordering or changing?
Are there additional bearings etc or such like needed, adding more to the bill?
Any of you that have done this, how much of a difference e do you notice.
I'm very interested to hear your views and experiences.
Cheers

Sent from me!

Dean191 · Aug 18, 2017

Thinking of doing mind soon, diff bearings are starting to get a little vocal so if it's out on the floor it may as well have a diff quaife ATB promises good results with the TC engaged (how I usually drive it tbh) and is a fit and forget effort so probably the route I'll take. TSR supply, fit and recon your box for 1200 which doesn't sound like a king's ransom. I'm sure there's other blokes just as good and a bit cheaper though. I'm not sure it's a strictly necessary mod with such a relatively modest power increase but I do like the way fwd cars with a slipper go up the road! In your case I'd certainly wait until the clutch or something is out, gives you time to save up and you can fit a fancy clutch whilst you're in there too

vwtrev · Aug 29, 2017

I fancy an LSD too, getting too much wheelspin out of Clark Curve at Brands on a dry day, and seeing £700 - £850 price ranges for Quaife, Peloquin, etc. but having a chat with my mechanic friend he said as it goes inside the gearbox, is an expensive retro fit job, he recommended I look for a breaker selling a box with one in it. A Google search has shown some have gone in the past from upwards of £400.

I decided to spend £300 quid on some R888R's instead and the grip is improved over my Federal RSR's although I struggle to justify them being twice the price of the RSR's.

shackleford · Jan 29, 2018

Hi Sparkie,

The LSD goes inside the gearbox, and I think it's a drop in replacement for the standard open diff. As far as the best time to do it, the gear box needs to come out so I guess the next time that happens! During a clutch replacement or something.

I'm looking at getting an LSD somewhere down the line, but I've just had my gearbox out and don't fancy doing it again any time soon! I'm not sure how a mechanical LSD would interact with the electronic diff that the LCRs come with.

George

vwtrev · Jan 29, 2018

Hi, I don't think they have any diff at all, mechanical or electronic. They have traction control / stability control (ESP) that can be partially turned off but that just works on the brakes when you 'lose control' and is useless when driving out of corners in tuned car.

Trev.

shackleford · Jan 29, 2018

Hi Trev,

Well they certainly have an open diff inside the gearbox. My understanding was that the car will engage the brake on the wheel which is loosing grip, which transfers torque to the other wheel, so it's like a poor mans LSD. Not sure if I'm just describing the traction control though haha.

Cheers, George

Sparkie · Jan 29, 2018

Dean191 said:
Thinking of doing mind soon, diff bearings are starting to get a little vocal so if it's out on the floor it may as well have a diff quaife ATB promises good results with the TC engaged (how I usually drive it tbh) and is a fit and forget effort so probably the route I'll take. TSR supply, fit and recon your box for 1200 which doesn't sound like a king's ransom. I'm sure there's other blokes just as good and a bit cheaper though. I'm not sure it's a strictly necessary mod with such a relatively modest power increase but I do like the way fwd cars with a slipper go up the road! In your case I'd certainly wait until the clutch or something is out, gives you time to save up and you can fit a fancy clutch whilst you're in there too

I’ll take a look at RSR. Sounds like a decent price.
Awesome GTI do a helical quaffed diff fitted for £1645.
Sounds too much for my bank balance. But to change the cars handling through the corners and exit speeds it’s a mod I’m very keen on.
Especially when trying to put down the power of my LCR on exit. I do get plenty of wheel spin on the inside wheel and gentle understeer develops.
Plus I’m getting used to the power I have already and if I do the con rods and go custom stage 2 with “flames, pops and bangs” with power in excess of 300 gee gees, I would be all set to put the power down if I had the LSD.

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Sparkie · Jan 29, 2018

vwtrev said:
I fancy an LSD too, getting too much wheelspin out of Clark Curve at Brands on a dry day, and seeing £700 - £850 price ranges for Quaife, Peloquin, etc. but having a chat with my mechanic friend he said as it goes inside the gearbox, is an expensive retro fit job, he recommended I look for a breaker selling a box with one in it. A Google search has shown some have gone in the past from upwards of £400.

I decided to spend £300 quid on some R888R's instead and the grip is improved over my Federal RSR's although I struggle to justify them being twice the price of the RSR's.

4 sets of tyre and you could have a LSD!
Which is Clark at brands? Is that just after the hairpin?
By the way, what power are you running Trev?

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vwtrev · Jan 29, 2018

Hi m8, like your maths

but to be honest my RSR's are still going strong after two years, + the R888R's are purely track tyres. The car only does 1000 miles a year max, so never hoping to go through four sets

I also think the RSR's wear well for the grip, but the R888R's seem like they will last less time (softer).

Also, R888R's are around £150 each so £2400 = 4 sets....

Nah, that's Graham Hill bend after Druids (which is at the hairpin and also a bit slippy), Clark goes on to the main straight (the one that heads to the finish line), just checking a track map and its more Clearways that has a crap surface, I mean is slippy

, there's just something about that bit of track.

When it was re-mapped two years ago it hit 245 BHP and something around 258 ibFt torque (off the top of my head), so not massive, but it's down on power for the mods i'm running and to be honest, everyone thinks it has more than the rollers say, pulls like a train. The map is also a very smooth track spec. map so has a nice torquey power delivery with no peakiness.

On one hand, be nice to have bigger numbers, but I also don't want too much power to affect driveability on track.

It is 3/4 stripped out so probably 100 - 120kg lighter also.

cheers

Trev

Sparkie · Jan 31, 2018

vwtrev said:
Hi m8, like your maths but to be honest my RSR's are still going strong after two years, + the R888R's are purely track tyres. The car only does 1000 miles a year max, so never hoping to go through four sets

I also think the RSR's wear well for the grip, but the R888R's seem like they will last less time (softer).

Also, R888R's are around £150 each so £2400 = 4 sets....

Nah, that's Graham Hill bend after Druids (which is at the hairpin and also a bit slippy), Clark goes on to the main straight (the one that heads to the finish line), just checking a track map and its more Clearways that has a crap surface, I mean is slippy , there's just something about that bit of track.

When it was re-mapped two years ago it hit 245 BHP and something around 258 ibFt torque (off the top of my head), so not massive, but it's down on power for the mods i'm running and to be honest, everyone thinks it has more than the rollers say, pulls like a train. The map is also a very smooth track spec. map so has a nice torquey power delivery with no peakiness.

On one hand, be nice to have bigger numbers, but I also don't want too much power to affect driveability on track.

It is 3/4 stripped out so probably 100 - 120kg lighter also.

cheers

Trev

The triple 8R is good looking rubber. Screams out "Sticky"!
I'll be trying out the AD08R this spring.
I'm learning Brands

on GT Sport at the moment ,along with the Nordershliffe

! However you spell it

Those are decent figures with it stripped out buddy.

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vwtrev · Jan 31, 2018

Cheers. Yes, heard good things about AD08R but never met anyone running them, A lot of track cars R888's / R888R's.

Learning Brands, I Drove it once on Forza 7 with my sons Force Feedback steering wheel, it's good but you cannot get the sense of dropping off Paddock hill bend

I'm there on 16th Feb, there sre still spaces left with Javelin.co.uk if you want to try out your new skills.

cheers

Trev.

Sparkie · Jan 31, 2018

vwtrev said:
Cheers. Yes, heard good things about AD08R but never met anyone running them, A lot of track cars R888's / R888R's.

Learning Brands, I Drove it once on Forza 7 with my sons Force Feedback steering wheel, it's good but you cannot get the sense of dropping off Paddock hill bend

I'm there on 16th Feb, there sre still spaces left with Javelin.co.uk if you want to try out your new skills.

cheers

Trev.

Yup I'm using a wheel too great fun, but you don't get the sense of drop off and off camber etc.
Great for learning what's coming next though.
GT is a real simulator, so it does have mapped tracks with all its bumps and lumps etc. Close as games get I recon.
Feb16 th Ooh that is tempting. I'll check diary.
Doubt I'd get the rubber on in time but maybe.

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Hedgehog Dodger · Feb 2, 2018

vwtrev said:
Cheers. Yes, heard good things about AD08R but never met anyone running them, A lot of track cars R888's / R888R's.

Learning Brands, I Drove it once on Forza 7 with my sons Force Feedback steering wheel, it's good but you cannot get the sense of dropping off Paddock hill bend

I'm there on 16th Feb, there sre still spaces left with Javelin.co.uk if you want to try out your new skills.

cheers

Trev.

All we use is AD08r's. We even converted some of the Mpower.boys to them at Oulton

Super sticky and even good in the wet, only downside is they wear quickly. Say 4 yrack days on a set (Doing roughly 75 laps a track day.

vwtrev · Feb 3, 2018

Sparkie said:
y.
Doubt I'd get the rubber on in time but maybe.

Looking at the weather it's going to be too cold for decent tyres, so whatever you have at the moment on there, now's a good time to use them up, ready for the next rubber

Trev.

Sparkie · Feb 3, 2018

vwtrev said:
Looking at the weather it's going to be too cold for decent tyres, so whatever you have at the moment on there, now's a good time to use them up, ready for the next rubber

Trev.

Ok, tempted even more.

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Hedgehog Dodger · Feb 7, 2018

Sparkie said:
Ok, tempted even more.

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Might tempt you

https://m.ebay.co.uk/itm/Quaife-LSD-QDF13R-VW-Audi-6-Spd-02M-2wd-/132493706754

If I wasnt getting my map I would buy this.

vwtrev · Feb 7, 2018

Might tempt you

I think you deserve a cut from the sale now, posted it in the right place... form an orderly queue

On a different take would you chance one of these really working.... https://tinyurl.com/ychwzn98

Hedgehog Dodger · Feb 7, 2018

vwtrev said:
I think you deserve a cut from the sale now, posted it in the right place... form an orderly queue

On a different take would you chance one of these really working.... https://tinyurl.com/ychwzn98

If i wasnt getting my map tomorrow i would seriously consider this.

My technical knowledge of diffs is limited, bit hey its from the States so must be good.

Sparkie · Feb 7, 2018

vwtrev said:
I think you deserve a cut from the sale now, posted it in the right place... form an orderly queue

On a different take would you chance one of these really working.... https://tinyurl.com/ychwzn98

Nope. Not with my baby.

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Sparkie · Feb 8, 2018

That qualify diff is bloody cheap. Half price ish.
Still looking for a good gearbox specialist round my way, that I'd be happy to have fit it.
Bloody interested in that, at that price though.

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