Goodspeed Special on Quaife LSD's for C32
While on the topic - does Phantom Grip make a LSD option for C32s and C55s? Their site advertises an option for the SLK32, and I'm aware of SRT-6's using it (which is the exact same as the SLK32 diff), but ours is different. And they don't show a C32 or C55 option. I'm not saying they don't make one, but if they do, they need to update their site.

Although, if you're on a budget, the Phantom Grip may suit your needs well enough.
https://mbworld.org/forums/c32-amg-c55-amg-w203/246751-phantomgrip-going-do-lsds-any-mercedes.html
Last edited by Gramma_Benz; Mar 17, 2010 at 09:31 PM.
Although, if you're on a budget, the Phantom Grip may suit your needs well enough.
https://mbworld.org/forums/c32-amg-c55-amg-w203/246751-phantomgrip-going-do-lsds-any-mercedes.html
I also had a chance to talk to xxxxxxx regarding our plan. He is in agreement that the upgrades should be installed incrementally as you have suggested. He is jammed at the moment getting ready for race season and then will be at the Road Atlanta Race Track and will not be available to start the install until the week of the 29th of March. I will call you on March 19th to purchase the Quaife LSD. The plan is to have “all of the parts installed by mid April” as the racing season will be in full tilt by then. We will run a dyno check on the car after the Quaife LSD is in place. I will then purchase the Long Tube Headers and the Dual air Intake system. We will dyno the C32 again and see if we need to consult with whoever you designate from xxxxxxxxx in our area.
After we get all that tuned up to our satisfaction I will purchase the Front mount heat exchanger and dyno again to see if any further tuning is necessary. We have one question regarding the heat exchanger; can you give us a short explanation on how this item specifically works and its benefits??
As a side note I am giving your email the widens possible distribution as we feel that it is “in all of our interest” to get the word out on your suggestions as the feedback form the New England, Ohio MB clubs and other clubs has been very positive. I will tell you that I am “the guinea pig for all of them” and they are waiting for a full report from me when all the mods are in C32AMG and I run an evaluation at NHMS at a BMW racing school in April.
Thank you for setting me on the right road! will buy one this week!
Last edited by bmw instructor; Mar 22, 2010 at 02:50 PM. Reason: n/a
Quaife LSD - $1395
Long Tube Headers - $1695
Dual air intake system - $ 595
Front mount heat exchanger - $ 495
These parts do not include shipping as I would have to get an accurate quote for you. I know that you live across the country from us but if shipping your car to us to do the actual installation and tuning is an option, I would love to know it so that we can be 100% assured that you are getting every bit of performance possible for the mods we do. Let me know your thoughts on everything discussed.
You do not need any other parts.
I have raced with Quaife in the SCCA for 10 years on my Porsche Race Car in "ITS" class from 1995 to 2005 with no problems and I did about 10 races a year. My laps where 3 seconds better with Quaife at any SCCA road race track.
The Best of Mercedes & AMG

A2033502456. They go for over $600 each at parts.com. As far as your 2002 #607, I don't know if the Quaife LSD will work without changing the drive shafts. Didn't work in my car. On the Quaife web site it used to say that Quaife-QDF7V 210 Axle only fits 2003-2004 C32s but it does not say that now. Let me know if you have any other questions.
A2033502456. They go for over $600 each at parts.com. As far as your 2002 #607, I don't know if the Quaife LSD will work without changing the drive shafts. Didn't work in my car. On the Quaife web site it used to say that Quaife-QDF7V 210 Axle only fits 2003-2004 C32s but it does not say that now. Let me know if you have any other questions.
I have passed your "valuable information" along with my VIN # and date of manufacture of my C32 to Goodspeed and they have passed that information on to Quaife. As soon as I have the answers I will double back and give you the feedback form Quaife/Goodspeed.
Again thank you!
A2033502456. They go for over $600 each at parts.com. As far as your 2002 #607, I don't know if the Quaife LSD will work without changing the drive shafts. Didn't work in my car. On the Quaife web site it used to say that Quaife-QDF7V 210 Axle only fits 2003-2004 C32s but it does not say that now. Let me know if you have any other questions.
I just talked to the Quaife brand specialist and he said that the QDF7V is for your car and the QDF9V is the proper one for the 2003-04 cars.
Apparently they must have realized the problem and addressed in the last couple years since your guy had purchased his. The 607 on your car is just the AMG production number, the numbers we would be concerned with are whether or not the car has the 210 or 215 axles which they have already confirmed yours to be the 210 axles. I just thought I'd give you that information for you to keep in your own mental file. Lol I feel confident that we are in fact on the right track with what we were doing.
Thanks,
Sean

If you have the experience that you claim, you would certainly know this is a waste of both.
Open diff, stock psoi, auborn, tru trac, what?
And please let me know what tracks, if you have the time. This seems like a truly magical gain, IMHO.
I can state with track times that at Nelson Ledges road course, an SCCA track I might ad, from a stock posi to a custom one off Auborn I was about 0.75 seconds faster. That is low 1:18's vs low 1:17's. Not quite a 3 second gain.
And if you look at both posi's, the custom Auborn has a higher torque basis rating than a Quaiffi
Last edited by MRAMG1; Apr 2, 2010 at 10:43 AM.
Still think DYNO mode is the way to go with a C32 on the track

As I stated in the other thread "Dyno Mode" IF you have a posi, it would work. But in stock form


And yes I have lap times that prove it
Last edited by MRAMG1; Apr 2, 2010 at 10:41 AM.
Still think DYNO mode is the way to go with a C32 on the track

As I stated in the other thread "Dyno Mode" IF you have a posi, it would work. But in stock form


And yes I have lap times that prove it

Let me be as clear as possible.
1. In stock form a C32 will ALWAYS be slower at ANY road course when in dyno mode. PERIOD. I have tried this at Beaverun and Nelson ledges and no this as a 100% certain fact.
2. With a posi in a C32 I would ALWAYS agree that it WOULD be faster on ANY road course, as you would no loner be bother with the ECU cutting power.
3. Are you perhaps confusing DYNO mode with ESP mode

I only ask as you logic seems to be pointing in this direction, but we all know what assumptions are my friend.
Again, please enlighten us as to what track you were 3 seconds faster on with a Quaiffi in your Porsche.
You do realize that you are claiming a psoi is as good or better than R type tires in reducing track time.
Last edited by MRAMG1; Apr 2, 2010 at 11:37 AM.
Let me be as clear as possible.
1. In stock form a C32 will ALWAYS be slower at ANY road course when in dyno mode. PERIOD. I have tried this at Beaverun and Nelson ledges and no this as a 100% certain fact.
2. With a posi in a C32 I would ALWAYS agree that it WOULD be faster on ANY road course, as you would no loner be bother with the ECU cutting power.
3. Are you perhaps confusing DYNO mode with ESP mode

I only ask as you logic seems to be pointing in this direction, but we all know what assumptions are my friend.
Again, please enlighten us as to what track you were 3 seconds faster on with a Quaiffi in your Porsche.
You do realize that you are claiming a psoi is as good or better than R type tires in reducing track time.
Dyno mode; insert key turn to position one then hold the trip odometer until the beeps and the rest is blahblahblah.
Any track in the USA but the original testing was done in the 2002 at what was then NHIS.
I run race rubber on the C32AMG as it is just a race track car and nothing more.
Let me know if/when you get to Beaverun or Nelson Ledges as I am always willing to come out for some fun.
I would be very curious to see the lap times with a quaffi.
I will be sure to double back with you as we make progress with Goodspeed and the rest of the parts.
Also If I am ever teaching racing at the two tracks that you mentioned I will be sure to give you heads-up.







