AutoLusso Quaife ATB LSD for 2.4 20v 159/Brera report. - Alfa Romeo Forum
You are currently unregistered, register for more features.    
Tuning & Upgrades Discuss performance enhancements for your Alfa Romeo

 
Thread Tools
(Post Link) post #1 of 18 Old 28-04-12 Thread Starter
Status: a good shot of nitrous will sort that!
AO Silver Member
 
jbsmith1's Avatar
 
Join Date: May 2008
Location: United Kingdom
County: Essex
Posts: 1,968
AutoLusso Quaife ATB LSD for 2.4 20v 159/Brera report.

Hi,
Many of you will know me from my F1 Brera thread, but some may not, so I thought it best to post this latest update in my thread and under a more informative title here too.

How it started
A few weeks ago I recieved a pm from Ned, he explained how he had met the Quaife rep at the Autosports show and that in talking the rep said they now did an ATB LSD differential for the F40 gearbox used in all 2.4 159/Brera's.
Ned said afaik you've changed just about everthing on that car except the diff...would you be interested as I'm putting in a high volume order to get the best price.
Well Yes of course I'm interested, Ned said well problem is we don't know yet how long this may take, the F40 gearbox needs to be removed from the car, opened up, old diff removed, ring gear removed and tranfered to Quaife diff, then new diff bearings fitted and all re-assembled and tracking aligned.
No problem I said, you can borrow the car for as long as it takes, now I've thought about it, this is exactly what this car needs!

The back ground.
A std 159/Brera has an “open” diff that does nothing for maximising the traction available from our tyres, the std diff transmits torque to the wheel with LEAST resistance/traction, its as simple as that and spins it up! and then a very complicated and slow traction control system brakes that spinning wheel and if thats not enough, cuts your throttle too, all you wanted to do was leave that slippery junction quickly and merge with the higher speed traffic!
So what can be done to get more power to the ground before wheel slip accurs? Well finding a way to send torque to the wheel with MOST resistance/traction would be a good start…how about that for an idea?

Quaife has the answer with there Automatic Torque Biasing Limited Slip Differential.
http://i24.photobucket.com/albums/c2...rential-01.jpg
The Automatic Torque Biasing (ATB) Helical LSD differential is Quaife's unique design, and is an after-market differential that provides smooth, constant traction for racing or slippery road conditions. Suitable as an ideal replacement for any front, rear or four wheel drive application, this differential has the added benefit of no adverse effect on the steering of a front wheel drive vehicle. Quaife ATB differentials have been used in a wide array of applications, from Formula 1 cars to emergency and public utility vehicles, where all weather mobility is essential, and where the product must perform in the most demanding of conditions.

The differential progressively locks as torque increases; there are no plates or clutches to wear out, unlike the more conventional limited-slip designs. The Quaife differential is particularly effective in combating the effects of FWD torque steer and understeer.

As engine power outputs through modification increase ever further, the ability to use this extra performance becomes more important. Wheelspin may look spectacular, but such loss of traction from either a standing start or exiting a bend wastes time, whether driving on the road, circuit, rally stage or drag strip. Fortunately, QUAIFE's patented Automatic Torque Biasing (ATB) Helical Limited Slip Differential (LSD) is an effective, well-proven, low-cost solution.

As a direct replacement for the standard, factory-fitted ‘open' differential, QUAIFE's unit can transform the performance of any car.
Unlike a conventional plate-type limited slip unit, QUAIFE's item relies on gears rather than clutch plates for its operation. That means it’s much smoother in operation, as it never locks harshly with a set pre-load of wheel slip across the driven axle. Rather, it automatically biases the torque away from the spinning wheel across the axle, to a constantly varying degree.

How does it work?
Sets of floating helical gear pinions mesh to provide the normal-speed differential action. In the event of wheel slip, torque bias is generated by the axial and radial thrusts of the pinions in their pockets. The resultant friction forces enable the differential to transmit a greater proportion of the torque to the appropriate wheel. The effect is progressive and at no stage does the differential lock solid, hence the inherent safety and user-friendliness of the QUAIFE ATB Helical LSD unit.

To the driver, especially of a front-wheel drive car, the results are significant performance improvements; superior, controllable traction without the harsh steering wheel snatch or torque steer that have long been associated with performance differentials.

The QUAIFE diff is quiet in operation, requires no special maintenance or rebuilds, is long-lasting, and retains the standard method of lubrication, making for an easy, pain-free upgrade. Proven in rallying, racing and on the road, this differential offers safe, reliable, winning performance - everything you would expect from a QUAIFE product.

Installation pics.
Standard "open diff"
http://i24.photobucket.com/albums/c2...tdopendiff.jpg

Quaife ATB LSD.
http://i24.photobucket.com/albums/c2...th1/QDF21B.jpg

Quaife ATB LSD with ring gear attatched.
http://i24.photobucket.com/albums/c2...Quaifediff.jpg

New bearings.
http://i24.photobucket.com/albums/c2...ngs_medium.jpg

Quaife installed in F40 gearbox.
http://i24.photobucket.com/albums/c2...withQuaife.jpg

How does it feel?
I returned a few days later to collect the car and meet some of the Autolusso guys, all very friendly and I was told the finger print recognition caught a few out! lol, they kindly checked my Brands Hatch track settings on Neds high tec aligner, manythanks.

Out on the road this diff is very impressive, I can finally get all the power available from the F1 remap to the ground!
As soon as I drove out of the first junction I felt there was a huge increase in traction, no scrabbling of tyres when there is alittle bit of loose gravel under one wheel, just put your foot down and go! No torque steer, super smooth operation.
Entering roundabouts at speed feels more stable, and applying throttle exiting a roundabout with steering lock still on and the car stays on line as the torque is sent to the outside loaded wheel with most traction, its quite a feeling to be hugging the corners with far more throttle than before and feeling all the traction available!
http://i24.photobucket.com/albums/c2...1/DSCF3992.jpg
http://i24.photobucket.com/albums/c2...1/DSCF3999.jpg
http://i24.photobucket.com/albums/c2...1/DSCF3339.jpg

I can't reccomend this diff highly enough, its exactly what ford fit to there RS model, its exactly what Renault fit to there Megane`Cup, why? because they are high powered fwd drive cars like ours, and these ATB LSD diffs really work and traction is king!

Ned says a 1 day turn around is possible. Price is 1250 including VAT.
If your having a clutch or DMF done at the same time a very competitive package deal can be done, if you ask nicley he may even put my Brands Hatch geometry settings on for you too.

Autolusso is based in Houghton Regis, near Dunstable.
Phone: 01582 869560
Autolusso - Alfa Romeo Specialist | Q2 & Superior Quaife Differential


Manythanks to Ned and his team from me.
jbsmith1 is offline  
Sponsored Links
Advertisement
 
Status: El finto :(
AO Member
 
KendalBeefcake's Avatar
 
Join Date: Mar 2008
Location: United Kingdom
County: Kent
Posts: 886

Member car:

159 SW Ti

Great post! Where there any electrical modifications need to overcome the standard TC? Any idea what other models/engine use the F40 gearbox? Or is this just for the 2.4 crew?
KendalBeefcake is offline  
Status: no pain, no gain
AO Silver Member
 
yan.ko's Avatar
 
Join Date: May 2010
Location: Czech Republic
County: Moravskoslezský
Posts: 1,951
Garage
Welcome and congratulations, James
yan.ko is offline  
Status: no pain, no gain
AO Silver Member
 
yan.ko's Avatar
 
Join Date: May 2010
Location: Czech Republic
County: Moravskoslezský
Posts: 1,951
Garage
Quote:
Originally Posted by KendalBeefcake View Post
Great post! Where there any electrical modifications need to overcome the standard TC? Any idea what other models/engine use the F40 gearbox? Or is this just for the 2.4 crew?
F40 is only on 2.4 (and maybe 3.2JTS). All 4cyls should have M32 gearbox.
yan.ko is offline  
(Post Link) post #5 of 18 Old 28-04-12 Thread Starter
Status: a good shot of nitrous will sort that!
AO Silver Member
 
jbsmith1's Avatar
 
Join Date: May 2008
Location: United Kingdom
County: Essex
Posts: 1,968
Quote:
Originally Posted by KendalBeefcake View Post
Great post! Where there any electrical modifications need to overcome the standard TC? Any idea what other models/engine use the F40 gearbox? Or is this just for the 2.4 crew?
Hi mate, no TC alteration needed.
The Quaife ATB LSD is available for a whole range of Alfa's.

From Autolusso's site:
Quaife ATB Differential now available for Mito 1.4 TB 155 BHP
Supplied and fitted 650 inc VAT

Quaife ATB Differential now available for 159 / Brera 2.4 JTD
Supplied and fitted 1,250 inc VAT
(This involves removal and complete strip down of gear box)

The Q2 or Quaife differential can be fitted to the following models
Alfa Romeo GT 1.9 JTD 16v & 3.2 V6 24v
Alfa Romeo 156 2.4 JTD 10v, 2.5 V6 24v and GTA
Alfa Romeo 147 1.9 JTD 8v/16v & GTA
Alfa Romeo GTV/Spider 3.0 / 3.2 V6 24v
Alfa Romeo 166 2.0 TS, 2.5 / 3.0 / 3.2 V6 24v
jbsmith1 is offline  
(Post Link) post #6 of 18 Old 28-04-12 Thread Starter
Status: a good shot of nitrous will sort that!
AO Silver Member
 
jbsmith1's Avatar
 
Join Date: May 2008
Location: United Kingdom
County: Essex
Posts: 1,968
Quote:
Originally Posted by yan.ko View Post
Welcome and congratulations, James
cheers dude
jbsmith1 is offline  
Status: Breraless :(
AO Platinum Member
 
Squadrone Rosso's Avatar
 
Join Date: Aug 2005
Location: United Kingdom
County: Neath Port Talbot
Posts: 30,126
Saw your car on the ramps

You need tyres with the proper load ratings though
Squadrone Rosso is offline  
(Post Link) post #8 of 18 Old 29-04-12 Thread Starter
Status: a good shot of nitrous will sort that!
AO Silver Member
 
jbsmith1's Avatar
 
Join Date: May 2008
Location: United Kingdom
County: Essex
Posts: 1,968
Quote:
Originally Posted by Squadrone Rosso View Post
Saw your car on the ramps

You need tyres with the proper load ratings though
cheers SR, yes point taken on the tyres. You weren't sent from the "other side" to spy was you?
jbsmith1 is offline  
Status: Any other GTV owners in Darlington?
AO Member
 
Heroric's Avatar
 
Join Date: Sep 2011
Location: United Kingdom
County: Durham
Posts: 64

Member car:

GTV V6

Shame Quaife's ability to supply parts on time is not in line with its performance. was due 18th April and still waiting while my car sits in bits at the garage! Not happy.
Heroric is offline  
(Post Link) post #10 of 18 Old 29-04-12 Thread Starter
Status: a good shot of nitrous will sort that!
AO Silver Member
 
jbsmith1's Avatar
 
Join Date: May 2008
Location: United Kingdom
County: Essex
Posts: 1,968
Quote:
Originally Posted by Heroric View Post
Shame Quaife's ability to supply parts on time is not in line with its performance. was due 18th April and still waiting while my car sits in bits at the garage! Not happy.
sorry to hear that fella, it will be worth the wait.
jbsmith1 is offline  
Status: -
AO Member
 
Join Date: Aug 2011
Location: Slovenia
County: -
Posts: 10

Member car:

alfa 156

Hi!

Does this mean that a Quaife diff can be fitted to Alfa 156 2.4 20v model? this was no possible before. The 156 20v uses the same gearbox ( GM f40) as it is fitted to your car. I sure hope it can be fitted i would buy it in a second.
mihecmiha is offline  
Status: Always working
Identity Confirmed
Authorised Trader
 
Autolusso's Avatar
 
Join Date: Feb 2007
Location: United Kingdom
County: Bedfordshire
Posts: 7,035
Quote:
Originally Posted by jbsmith1 View Post
sorry to hear that fella, it will be worth the wait.
The guy was delayed but has his diff now and we have a good stock for his type of gearbox, we were selling them faster than Quaife thought

Hope yours if performing well, I am sure it is

Ned
Autolusso is offline  
Status: Always working
Identity Confirmed
Authorised Trader
 
Autolusso's Avatar
 
Join Date: Feb 2007
Location: United Kingdom
County: Bedfordshire
Posts: 7,035
Quote:
Originally Posted by mihecmiha View Post
Hi!

Does this mean that a Quaife diff can be fitted to Alfa 156 2.4 20v model? this was no possible before. The 156 20v uses the same gearbox ( GM f40) as it is fitted to your car. I sure hope it can be fitted i would buy it in a second.
Drop me an email tomorrow and we will workout what we can do for you

[email protected]

Ned
Autolusso is offline  
(Post Link) post #14 of 18 Old 18-05-12 Thread Starter
Status: a good shot of nitrous will sort that!
AO Silver Member
 
jbsmith1's Avatar
 
Join Date: May 2008
Location: United Kingdom
County: Essex
Posts: 1,968
Quote:
Originally Posted by Autolusso View Post
The guy was delayed but has his diff now and we have a good stock for his type of gearbox, we were selling them faster than Quaife thought

Hope yours if performing well, I am sure it is

Ned
Yes Ned, performing so well that I've desided to fit a bigger turbo now too!
jbsmith1 is offline  
Status: Always working
Identity Confirmed
Authorised Trader
 
Autolusso's Avatar
 
Join Date: Feb 2007
Location: United Kingdom
County: Bedfordshire
Posts: 7,035
Quote:
Originally Posted by jbsmith1 View Post
Yes Ned, performing so well that I've desided to fit a bigger turbo now too!
Cool, you know you are slightly mental don't you

I will save one of our brand new engines for you

Ned
Autolusso is offline  
Status: Any other GTV owners in Darlington?
AO Member
 
Heroric's Avatar
 
Join Date: Sep 2011
Location: United Kingdom
County: Durham
Posts: 64

Member car:

GTV V6

Quote:
Originally Posted by Autolusso View Post
The guy was delayed but has his diff now and we have a good stock for his type of gearbox, we were selling them faster than Quaife thought

Hope yours if performing well, I am sure it is

Ned
Quaife received and fitted, thanks Ned. Not driven it hard yet, but a noticable improvement in the wet out of junctions yesterday. new clutch and flywheel also made a huge improvement, though maybe less torque at low revs. now just the damn cental locking to sort... might be calling autolusso for a replacement actuator...
Heroric is offline  
(Post Link) post #17 of 18 Old 19-05-12 Thread Starter
Status: a good shot of nitrous will sort that!
AO Silver Member
 
jbsmith1's Avatar
 
Join Date: May 2008
Location: United Kingdom
County: Essex
Posts: 1,968
Quote:
Originally Posted by Autolusso View Post
Cool, you know you are slightly mental don't you

I will save one of our brand new engines for you

Ned
I'm going slighty mad...(queen)
Yes save me a couple of engines!
jbsmith1 is offline  
Status: HID - MoT Pass!
AO Silver Member
 
TOX1C's Avatar
 
Join Date: Aug 2004
Location: Salisbury
County: Wiltshire
Posts: 4,762
Quote:
Originally Posted by Autolusso View Post
Drop me an email tomorrow and we will workout what we can do for you

[email protected]

Ned
I can see the point on a newish car but with the greatest will in the world 1250 can be half to a third of the value of a 20v 156. This assumes all remaining parts will be in good condition (I doubt it). Add to that a clutch and DMF and you're looking at 2000.

Personally I don't have a problem with wheelspin; I value my driveshafts too much. Not to say I'd love the diff, but there are other priorities.
TOX1C is offline  
Reply

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Tuning & Upgrades

Tags
159 or brera , 20v , atb , autolusso , lsd , quaife , report

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome