Hi I am looking for some advice and recommendations on upgrading the sc on a 2003 w211 E55.

I have priced up importing the Weistec kit directly from Weistec. The car is stock standard with 100,000km on the clock.

I have contacted many performance shops in Melbourne (Australia) with no luck of having any of them touch it. The ones who specialise in Mercedes and other Euro cars are all saying it's too old and they wouldn't touch it unless they did a full engine rebuild with the installation. It appears most are only interested in a remote tune and basic upgrades. Considering the kit looks to be turn key I don't see why its such a fuss so I will probably do the install myself. I'm confident in doing so, it was more just to save time as life and work are super busy.

Weistec said if I send the ECU, they can do the tune and it will be plug and play for the kit. I was really hoping to have it checked and retuned locally but I can't for the life of me find anyone who can or would be willing to do this.

My questions to the more experienced and familiar:

Are there any reputable workshops in Melbourne, Australia who could do the install and or the tune?

Can the ECU that Weistec retune, be retuned locally here if I added some more mods not included in the kit?

Would going with the larger TB and smaller pulley be much more beneficial if added to the kit?

What other essential upgrades should I do if I go ahead and install this kit?

Any help/advice or anyone locally who has done something similar would be appreciated if you could reach out.

 

They are right in saying that a 22 year old car isn’t the best candidate for adding horsepower.

 

Frist of all, you do not need a whipple to make power, in fact all the record holder 113k cars are stock blower. imho its a waste of 8k all day long. Do all the cooling mods, add a 74mm and a SL TB and LTs and youll have 600hp all day and perfectly reliable. These engines are strong if theyve been even half maintained.

 

Agree with this wholeheartedly ^

This car is ***** to wall with some upgrades and most cars can't keep up (even modern cars, and this platform is 20+ years old). I think a TB is overboard too - small upper, maybe a lower (although I'm not a fan of touching the crank pulley), quality long tubes and a good dyno tune makes a 10-sec car and plenty of power on tap. What else can you ask for?

Weistec is a huge waste unless you're trying to break records and numbers.

My .02

 

Says who? I have a 30 year MKIV Supra Turbo with 850HP and it's far more reliable than some of these brand new turbo cars. Quite frankly, I've had no issues. So That's a load of horse*****.

 

Yes because all 22 year old cars get more reliable as they get older. Putting more strain on all of the parts will make them last longer and be less problematic. Makes great sense to modify them, and think that the 22 year old parts are going to be better than when they were new.
And that’s a Toyota not Mercedes. It’s like comparing the strength of steel vs balsa wood

 

@method you have two important bits of advice in this thread, which I agree with:

1. Those shops are full of it (seriously, a complete engine rebuild?).
2. You don't need an aftermarket supercharger to yield some notable power gains over factory on an M113K.

A smaller SC pulley (I went with a 77mm clutched one), some supporting / necessary cooling upgrades and a good tune will make it feel like a different car.

 

Thank you for all the replies. I am seriously reconsidering the Weistec now. The Weistec charger kit looked so much more efficient and the kit looks nice once installed. The motor has 100,000k's and I didn't think the age would have really affected the mechanical components that much considering how well built these seemed to be. Electronics/hoses etc I can understand how they deteriorate with age. I had an 89 Z32 that I had modified the hell out of and it ran flawlessly with little maintenance when I had it (I was young, first car) and no record of the maintenance it had prior (probably had the K's wound back as most jap imports do here in Australia). It wasn't until years later I lent it to a friend and a main bearing spun while he had it. I ended up doing a full ~750bhp rebuild and then sold the car. I am completely new to the M113K.

The fuel lines and fuel had fowled from sitting for so long in the e55 which destroyed the factory pumps. I had new factory pumps installed and it cost $6k. Looking at the aftermarket pumps I could have had it done a lot cheaper I think!

Would it still be worth upgrading the pumps and injectors?
A looped fuel rail is also recommended from what I have read?

In regards to the cooling, what is the best option?
I see twin pass from Weistec.
VRP seems to be single pass and offer an additional secondary heat exchanger which runs in conjunction with the single pass.
VRP also offer a top mount intercooler kit?
I can't find any info on the 1000hp liquid to air intercooler core that Weistec offer with the kit.

Reading the forums, the cooler pump upgrade seems to be the go as well, Bosch gets a lot of mentions.

I am waiting on a price for the VRP exhaust kit seen here : https://www.vrpspeed.com/product/xsp-lth500/
I am not sure if I should get the 200 or 400 cell cats. The dealer said the 200 would be louder, but how much louder? I don't want it to be super noisy so I would assume the 400 cell cats would be the go and then this kit would be welded up to the stock mufflers.

I am waiting on a price for the VRP long header exhaust kit which will be the first thing I will do along with cooling mods.

I had a look for the SL TB with no luck here.

What about the intake and air filter? The Weistec one looks nice and neat.

The biggest issue would be finding someone to do a tune. I finally spoke to someone who said his tuner should be able to do it but he never called back. I will follow up tomorrow because I am not a fan of a remote tune at all.

Appreciate all the responses again.

 

I have an 82mm throttle body (and new gasket from MB) that I pulled from an 09 CLK550. I'm not sure if this is the exact model that was on the SL, but it's a fair upgrade to the stock 74mm throttle body. I'd be willing to let it go pretty cheaply if there's a cost effective shipping method that makes sense for you.

Let me know, can PM as well if you'd like to discuss.

 

On a stock blower I make 600 /625 to the tires at 13lbs boost peak rpm. The stock blower can not keep up with the air flow with ported heads...that's what I have found after a lot of testing and racing. So with a 168 lower and 77 upper she makes a little heat and I combat that with nitrous so something to consider if you want to race it and save 8k for a new Weistec.

 

BobGodd,

I may be interested in your 82mm Dual Throttle Body for my 07’E63. I presume you have the Adaptor Plate (TB Mount) that goes with it? I’ve currently got the whole interior Stripped after doing the EVAP, Sound DampenerTreatment/Heat Treatment, Windshield 3/4 Cut Out to be ready for my Headliner to be pulled. Only thing is getting that **** Out it turning into a real Head Scratcher!

I might add that my 1st Phase (Xmas 2017) was doing an engine rebuild, front suspension, AirSprings & Air Pump, P/S Pump, Racing Brakes, Steering Rack Bushings etc. My 2nd Phase (CCP Virus) was for the Rear Main Seal, Drive Train Rubber, Rear Suspension Refresh w/every Rear Arm Bushing replaced with K-Mac Universal Poly Bushings! + New Shocks and Rebuilt AirSprings, and also changed the gearing in the Differential /W-LSD (MFactory) from 2.82 to 3.06 which got the gearing to be perfect for US Driving (3000rpm in 4th gear at 55mph). After getting the Headliner out to be redone in AlCanterra, I’ll get the floors, Speakers, Dash, New Radio w USB Hub F&R Camera’s installed as well as a Custom Aluminum Panel to hold all the Amps/DSP, Fans under the rear floor along with a secondary battery. I’ve got the CD &SAT/NAV DVD both “looped off” and am still trying to figure out how to Loop out the Radio since it’s a different MOST Connector?

I still intend on doing AR Long Tubes and either renewing or updating my Cam Phasers and maybe even the CAMS themselves + Tune! The 82mm TB would be a good add on at that time!

Sincerely,

E63007