I want to spread the word that a we are some on the BenzWorld site that are looking to do a group buy for Quaife LSD.

http://www.benzworld.org/forums/r230...group-buy.html

If that is something you would be interested in, head over to that thread and put your name in the hat.

 

We have found a deal that gives us a 7% discount if we have 5 buyers. Between 5 and 10 we get a 10% discount. We need one more to get the 10% so if you decide to join, you are getting an LSD with a 10% discount.

 

We have now found a vendor that is willing to provide a 15% discount. If this peaks you interest, head over to the thread and put your name in the hat.

 

This group buy (from BenzWorld) is finally fully defined it would seem...
I just finished hammering this pricing out with Birdsauto ... and this is arguably the best deal we are going to get on Quaifes...
Not only did they change their catalog price on the QDF28b (Quaife for early 2003 SL55s) AND give it a 15% discount in the group buy on top of the new pricing .... They also agreed to give 20% off of the QDFv27b which is used for all SL55s (and SL65s) starting during model year 2003.

here is the deal ...



This is how it works ... you've no doubt heard about the quality of QUAIFE differentials and how they improve the performance of your car ... and you're probably thinking, "what better time then during a 15% OFF GROUP-BUY to get one?" (and 20% off for their most popular Mercedes Diff the QDF27b !! )
SO... you click on this Link for Birdsauto (the company designated by QUAIFE to define, refine and distribute ALL quaife diffs for Mercedes and Bmw applications)....

Search for Quaife parts | Birds

And ... if your Mercedes is listed there ... then they have it! AND it is eligible for this GROUP-BUY !
then, all you do is click on the "inquiry" button (red circle to right of your listing) and fill in the inquiry form.

When filling it in make sure you include this info:
1) Full name
2)Full Address
3)Email Address
4)Telephone number
5)VIN
LASTLY (and this is important) in the "comments" section (last box on page), Type in "group buy" followed by your member name and the name of the forum (example: Group-buy, Latemodel21 / MbWorld) ... Additionally, in the comments section add the phrase, "please include estimated install labor for this application" if you are looking for a point of reference for getting a local install quote, AND ... feel free to add any questions you may have to the comment section as well (They are willing and able to answer all questions).

Based on your VIN, they (Birds) will be able to provide you with a model number for the Quaife ATB differential that is correct for your car and be able to let you know if there are any special installation notes (eg. if yours is an early model with bolt-on axles, your axle stubs might need a simple modification, etc).

Worth mentioning, ALL Quaife differentials supplied by BIRDS come with OEM Mercedes seals at no extra charge !

Once you get that Quaife model number from them and the calculated group-buy price, you can make an informed decision as to whether you want to participate in the group buy or not. WORTH NOTING: Birds has offered to make this special deal available through April 10, 2015 (giving you plenty of time to decide where you might have it installed, and if the cost justifies the benefit for you). The next step would be to provide a deposit (to demonstrate earnest participation in the group buy) and after 5 deposits are taken , they will start shipping at the 15% off deal (20% off for those getting the QDF27b). Also worth noting, while Birds normally requires a wire transfer for payment, during this group buy they will except payment by credit card (except AMEX)

As to what pricing you might expect ... well, (with the exception of just a few AMGs ... cl65, 210 e500amg, s55, s65, and slk32 that cost £959 or £964) EVERY AMG application I can find in their catalog has a price of £876 (pounds). With the 15% group-buy discount that becomes £744.4 or $1136 plus $67 shipping (to any US address) ... which equals $1204 (20% off on the QDF27b works out to about $1069 plus 67 shipping ... or $1137 total !!) keep in mind that the prices may fluctuate slightly as exchange rates change day to day of course.

If you want to know more about the benefits you should expect by upgrading to a Quaife ATB limited-slip DIff ... check out this Link ....
What is a Quaife ATB limited-slip differential? | Birds

A word about Birds ...
BirdsAuto has been instrumental in developing all of the Mercedes specific Quaife differentials. Exclusively offering the QDF27B, QDF28B,QDF29B, QDF30B, QDF31B, and QDF32B models that include all of the latest upgrades to improve lubrication and eliminate tolerance stack issues in order to insure quite operation and improve longevity.
The list of Mercedes models that BirdsAuto exclusively provides improved and refined Quaife differentials for includes:

203 C32 AMG
208 CLK55 AMG
209 CLK55 AMG
209 CLK 500
210/211 E55 AMG
215 CL500
220 S600
230 SL500
230 SL55 AMG
171 SLK55 AMG
204 C63 AMG
203 C55 AMG
203 320 CDI
209 CLK63 AMG
209 CLK55
211 E280 CDI
211 E500
211 E63 AMG
211 E55 AMG
212 E63 AMG
215 CL55 AMG
216 CL500
218 CLS63 AMG
219 CLS55 AMG
219 CLS63 AMG
219 CLS500
219 CLS320 CDI
221 S63
221 S500
230 SL600
230 SL63 AMG
230 SL65 AMG
McLaren SLR
230 SL600
209 CLK500
215 CL600 Biturbo
215 CL65 AMG
215 CL55 AMG
220 S65 AMG
220 S600 Biturbo
220 S55 AMG
170 SLK32 AMG
171 SLK350
203 C220d and C320
219 CLS 350
209 CLK320
216 CL65 AMG
216 CL600
221 S600
221 S65 AMG
221 S63 AMG
204 C320 CDI and C350 CGI
204 C250 CDI
207 E550 CGI
209 CLK320 CDI
211 E500
217 E550 CGI
218 CLS350 CDI
218 CL500
and more...


I just placed my order last night ... it's easy ... and easily the best mod I'll do this year !

Cheers,
Chris
Latemodel21

so, the early 2003 sl55 works out to about $1204 (including shipping)

and
all the rest of the SL55s and SL65's are $1137 (including shipping)

 

I have an SL65. I did not buy it new. I have read on here that SL65 don't come stock with locking differentials yet mine does not do 1 leg burnouts. How would I tell if someone changed the differential or am I wrong and SL65 have a locking differential?

 

MB claims there LSD in the SL65 is 40% locking
Kleemann is 60% locking
Renntech and Quaife are 100% locking but Renntech uses clutch type and Quaife is gear type

 

The stock limited slip on the SL65 is 30% locking with a delay. You will get a better performance with the Quaife LSD.

 

Mine may have the Renntech one as it was heavily modified at their facility in Florida. It really feels like it is fully locking up to me.

 

Renntech works..

 

-one more thing that I wanted to point out in case the board members weren't aware. Quaife USA to not affiliated with Quaife UK (the manufactures of the LSD). They are not affiliated with Birds either and do not offer the updated models of the LSD that Birds do.

 

I know the diffs went from 210mm to 215mm in 2003 for the SL55. Anyone have any idea how much stronger the newer diff is? Before I spend this much on a limited slip I'd like to know if it would be worth it for me to find a wrecked car and get the larger diff/axles off of it. I plan on doing pulley, tune, TB, headers & am considering putting on drag radials & taking it to the drag strip, so the rear will be taking on more power & more importantly the power will be 'hitting' the components much harder since there will be drag radials offering traction (if you just spin out every time I know it doesn't put nearly as much stress on the components).

Usually there is a torque rating for different differentials, but I have been unable to find one for each of these applications.

 

This is a good question and one that crossed my mind briefly. In my conversations with James (at Birdsauto) I got the impression that the 2 diffs (QDF28b for the 210 axle, and QDF27b for the 215 axle) were essentially the same case ... one being finished for a 210mm ring gear and the other for a 215mm ring gear. Which lead me to conclude ... that any difference in the case and/or axles (between the 210 and 215 styles) was likely small and not worth worrying about. For myself (with pulley(s), tune, etc on my "210" sl55)... I am not concerned and bought the 28b.

However, I'd like to hear other opinions on this and I encourage you (carguyshu) or anyone simillarly intereted to ask James or Kevin at birds ... or ask other members what there thoughts/experiences are relative to applying high power to "210 ringgear/axle cars" and let us know if you come up with a compelling reason to switch (upgrade) to 215 running gear.

we have till april 10th ... so you have some time to investigate

Cheers,
Chris

EDIT 3-9-15 ... This morning, I asked James (Bird) about this (QDF27b vs QDF28b relative strength) and he said that while the diffs are slightly different (not, "essentially the same case" as I had previously MIS-stated above), their performance (power handling capabilities and other-wise) is/are indistinguishable.
He went on to suggest that it is very unlikely that there is any difference in the associated running gear parts (housing, ring and pinion, and axels) that would justify the expence and bother of ugrading an early 210gear/axle car to the later 215gear spec (by changing the housing, ring and pinion, and axels, etc).
In other words ... put a Quaife in what you already have.
Chris

 

What benefits in layman's English will it provide over the stock diff.

 

instead of only 1 wheel getting power & the brake being applied to that wheel to make the other one also turn, this will make it so both wheels get power without the brake being applied.

An open diff (the one in your car now) sends power to the wheel with the LEAST traction. Mercedes counters this by putting the brake on that wheel so that the other one then spins. A limited slip (like what is being sold) sends power to whichever wheel has the MOST traction & the computer doesn't apply the brakes. Bottom line it saves you on brakes & gives you more traction.

Why mercedes thought putting an engine with over 500 lbs of torque in a car without a limitied slip was a good idea is beyond me, especially since limited slips have been around more than 70 years. I have a 68 SS Camaro I've restored & even with its puny 350 making maybe 300 hp there was no way I wasn't going to put a limited slip in.

 

The "puny" 350 is larger than the SL55 motor, you just have to throw a blower on it!

 

I am in. I will place my deposit as soon as i get my tax return

 

http://www.birdsauto.com/product-information/quaife-atb-mercedes-limited-slip-differential-conversions

in laymans terms, you will see less yellow blinking traction lights, and your engine management system will not interfere with your acceleration as often.

 

So you probably want to do some additional research before jumping into this. You may see some benefit from Quaife but not as much as those of us without an LSD. My 2009 SL 63 doesn't have one and I experience all the symptoms that an LSD should help solve.

 

yea its also built off of technology that's 40+ years older.

 

GOOD NEWS!

I was just notified by James (Bird) that he has received the 5th deposit this morning.

So it is a done deal ... the maximum discount has been secured.

ALL QUAIFES PURCHASED THROUGH THE GROUP BUY (BY APRIL 10, 2015) ARE NOW GUARANTEED THE FULL 15% DISCOUNT (20% FOR QDF27b).

Thanks to everyone involved in this.

Cheers,
Chris

 

Yeah!

 

The group buy is almost over.

Birds has had 16 members send an inquiry and of those, 8 members have now purchased their Quaife.
I installed mine in my SL55 the week before last ... and am loving it.

There is still time to take advantage of this deal. It technically ends tomorrow the 10th, but James (Bird) told me this morning that anyone who contacts him expressing interest in buying and completes payment before end of Business Monday (5PM London) will still be able to get this special deal.

thanks for everyone's participation.

Cheers,
Chris

 

Remarkable difference in performance. First immediate impression is how traction control impact is minimized. I was constantly being managed with the TCS coming on all the time. Even if I tried to turn it off if still seemed to impede. I've only done a bit of driving with the Quaife, but now under heavy acceleration the TCS has not gotten in the way. My mechanic took it for a before and after drive as well and also couldn't believe how well it worked. Zero regrets in making this investment. Thanks again to the folks who put this together.

James

 

I just got a note from James Bird at Birdsauto asking me to thank everyone for their participation in the group buy he and to mentioned some new products that they are adding to the very complete list of Mercedes models that they currently have developed quaife differentials for ...

.... he wrote,

"Hi Chris! Hope you're well.

Had a few late participants in the group buy, so we got 11 altogether, which I'm very happy with and grateful to you for. Thanks again for all your efforts Chris.

If you could pass on my thanks to everyone that purchased and/or submitted inquiries, I would really appreciate it. Sales have been steadily increasing over the last 6 months but we sold EIGHTY last month, which is a record for the Mercedes units, and I believe this group buy has certainly played its part in creating more interest. So thank you very much.

If anyone has any questions on anything Quaife Mercedes, they can contact me (James Bird) directly at quaife@birdsauto.com, or our partners in Colorado at Kleeman USA http://www.kleemann.dk/kleemann-usa/.


Lastly, next week we are receiving stock of 2 brand new Quaife LSD units which will fit models such as the 172 SLK55 AMG, 204 C220 CDI, 207 E250 and E300 CGI, 209 CLK280, 209 CLK 350, 218 CLS 300, 231 SL350 and more. Let us know if you're interested!

Thanks again.

Regards, James
quaife@birdsauto.com
james.bird@birdsauto.com



to which I replied,

Thank you, James and everyone at Birds for making a great product like the Quaife differential even better and more accessible buy refining its design and defining its Mercedes applications.
Great working with you too !
Cheers,
Chris