TURBO on a slk200

AMJAD90 · May 28, 2011

hello everyone..
I’m new here, and this is my first post. and by the way my name is Amjad..

I own a SLK200 1998, which comes with a stock 193 hp. And I’m planning to add a turbo charger on it. I’m even thinking of changing the engine to a bigger capacity and then add the Turbo.. important note about that, is that I can’t enlarge my engine to anything bigger than 2.6 and that’s due to government laws !!!

I have read more than few topics on this subject, but none of them finished their projects. So I still can’t find a final solution.. but anyway, I’m going next week to a mechanic who is a friend of mine. And he is very good in these things, he used to be rally cars tuning mechanic

But before going I need to know what will I be facing.

Now to the important talk.. from what I know the compression ratio of my engine is around 9 psi, probably slightly less, so it will fine to hold the turbo power. but If I’m wrong.. there are more than one crazy solutions which I can use.. I’ll tell you about them if I’m wrong

From what I read I found that there is a problem with getting enough fuel to the engine, I think that problem can be solved with bigger injectors or if that won’t work.. adding more injectors probably will fix that. And to deal with the added injectors there are few electronic devices which can handle that.

The biggest problem which I’m afraid of is the ECU. I don’t know if it will be okay .. if it won’t, a possible solution is to use a universal after-market ECU (which are made specifically for tuned turbo charged engines) and connect it to the engine. And let the original ECU handle everything else in the car ( like the AC, hardtop, etc.)

Considering the turbo and it’s connections and everything else that should not be a problem.

If you can find something wrong or might not work or even might give a problem please tell me.. I’ll really appreciate it.
If there is anything stupid that I said please be kind to let me know and correct it If you please.
If you have any solution for any problem PLEASE let me know about..

Thank you for reading (I know it’s a little long) and really thank you for helping 

isarescu · May 29, 2011

Sorry for the offtopic:

SLK 200 (1996-2000) - 2.0 L (1998 cc) 136 bhp (101 kW; 138 PS) I4
SLK 200 Kompressor (2000-2004) - 2.0 L (1998 cc) 163 bhp (122 kW; 165 PS) I4 supercharged engine, 0-60 mph in 8.2 seconds, top speed of 223 km/h (138 mph).
SLK 230 Kompressor(1996-2000) - 2.3 L (2295 cc) 193 bhp (144 kW; 196 PS) I4 supercharged engine
SLK 230 Kompressor(2000-2004) - 2.3 L (2295 cc) 197 bhp (147 kW; 200 PS) I4 supercharged engine, 0-60 mph in 6.9 seconds, top speed of 240 km/h (148 mph).
SLK 320 (2000-2004) - 3.2 L (3199 cc) 218 bhp (163 kW; 221 PS) V6 engine, 0-60 mph in 6.5 seconds, top speed of 245 km/h (152 mph).
SLK 32 AMG (2001-2004) - 3.2 L (3199 cc) 349 bhp (260 kW; 354 PS) V6 engine, 0-62 mph in 5.2 seconds.[4]
Wikipedia

He also say that his slk has 193bhp: http://www.benzworld.org/forums/r170-slk-class/1589782-belt-noise.html

Am I missing something?

AMJAD90 · May 29, 2011

hi isarescu

about that, there is a SLK which comes with 193 HP stock

it’s only exported to Portugal and Greece and few other places.. including my country (JORDAN)

, and that edition only goes to the year 2000..

you can see it hear on Wikipedia
Mercedes-Benz R170 - Wikipedia, the free encyclopedia

you can notice that there are two types of the slk200 k  I have the above one

the one with 193 hp 

now I hope you can help me with the rest 

thanks for reading 

snake66 · May 29, 2011

AMJAD90 said:
hi isarescu

about that, there is a SLK which comes with 193 HP stock
it’s only exported to Portugal and Greece and few other places.. including my country (JORDAN) , and that edition only goes to the year 2000..

you can see it hear on Wikipedia
Mercedes-Benz R170 - Wikipedia, the free encyclopedia

you can notice that there are two types of the slk200 k  I have the above one the one with 193 hp 

now I hope you can help me with the rest 

thanks for reading 

Hello

I verify this statement, i dont know about Jordan, but for Portugal and Greece there was a 192 BHP slk 200K, up to the face lift, then all came out with 163 BHP. The reason to reduce the HP was the fact that it was so near to the 230 K, in Portugal and Greece we pay tax on new cars acording to the cubic capacity of the motors, so, the 230 was much more expensive for no diference in horse power.

As far as the injectors, installing larger flow, is possible, more injectors, i dont think it can be done.

I know there is one member from Greece who managed to pull out a turbo conversion on the same engine, but not an SLK.

I do believe the electronics will be the major inhibiting factor for this kind of modification, but would love to see one come out.

As for me, my 230 will remain dead stock and in mint original condition, I love the way the car came from factory, and maybe, just maybe, it will be a colectors item in some years.

Thanks to all :surrender:

dynhm6 · May 29, 2011

snake66 said:
As for me, my 230 will remain dead stock and in mint original condition, I love the way the car came from factory, and maybe, just maybe, it will be a colectors item in some years.

Ditto that.

Subby_ · May 30, 2011

there is a reason why there arent any turbo conversions which have been done to the end... if it was cost effective, and decent power gains & easy to do, it would have been done any many examples... you dont really have the room in the r170 chassis to put a reasonably sized turbo in there.

what people forget is you need exhaust gas to spin the turbo... and you will have to rev it to get there.. depending on the size of the turbo boost may come on as late as 3,500-4,000rpm and your redline is 5800rpm (pre face lift) and around 6000rpm (post face lift)... not much of a power band...

32krazy! · May 30, 2011

Subby_ said:
there is a reason why there arent any turbo conversions which have been done to the end... if it was cost effective, and decent power gains & easy to do, it would have been done any many examples... you dont really have the room in the r170 chassis to put a reasonably sized turbo in there.

what people forget is you need exhaust gas to spin the turbo... and you will have to rev it to get there.. depending on the size of the turbo boost may come on as late as 3,500-4,000rpm and your redline is 5800rpm (pre face lift) and around 6000rpm (post face lift)... not much of a power band...

it has been done twice on the crossfire which is the same driveline as the slk. both were done to the srt-6 which is the chrysler slk32 version. one has a turbo setup which replaced the s/c and to date has dynode 450 rewhp and 475 ft/lbs torque. the other is a supercharged 3.2 with a rear mounted turbo pushing the s/c. close to 500 hp so far. neither was cheap and both were complete custom builds. it can be done if you have a fat wallet!

gakz · May 30, 2011

i still am tryin to figure out why none of you read the post I made about the individual from europe. He turbod the m111 engine, close to 400rwhp. Stand a lone ECU setup.

The biggest hurdle is whether to use a "piggyback" ems or a full stand a lone.... and then wiring it up to our wiring harness

AMJAD90 · May 30, 2011

snake66

thank for verifying what I said man

here in Jordan we have the same rules, and that’s why I have the slk200… although I would love to get the slk32…

I will hope I’ll find the best way to do the electronics!! And to tell you the truth I’m afraid of them :

for the collector’s item, I think that will take more than just few year

although that would be great

Subby_

Now about the cost!! I think that is the main reason why people don’t do it a lot and the electronics.. It probably will be a little costly.. but not much. And it won’t be a problem for me...

For the space for the TUBO!! I disagree with you.. I think we can fit one there easily!!

And of course no one will forget the exhaust and it’s like to the turbo!! It’s the main principle why I would go for the turbo and not for the supercharger!!

For the turbo boost it’s possible to make it come earlier than 3.5… let’s say 3 or even 2.5.. and that will be good.. especially if I can keep the kompressor as will.. which is a possibility.
Even if I relay totally on the turbo, that turbo power is much greater than the kompressor..

Thank you for reading and sharing

hope you’ll let me know more about what you think..

AMJAD90 · May 30, 2011

32krazy!

That great to hear.. specially with the which still has the s/c..
If you can would you please give me any information about them.. I would be really thankful..

About the money thing!! That won’t be a problem.. it’s a little cheap here to tune cars.. and the mechanic is my friend.. so I think it will be oka 

Thank you for your post.. you sure gave me a boost

gakz

probably when I saw that it’s not an slk I skipped it.. my fault.. but it’s really something..
I just searched through your posts and found it!!! I have few questions that I’ll ask you there..
Thank you so much for the information..

And I’ll put what I ever I find out here

32krazy! · May 30, 2011

go to crossfireforum.org and search for turbos. its all there. the most important thing you will need to know is the ecu's are encrypted in german. unless you run standalone you better find 1 of the 4 tuners or so that have cracked the codes

AMJAD90 · May 31, 2011

32krazy!

Thanks for the information.. I’ll take a good look at them..

Now tuning the original ECU is very hard and probably very costly.. so the idea is to run the engine with another ECU which comes universal for Turbo charged engines…

Now the question I hope you can help me with.. will the original ECU keep working and managing everything else in thecar without the engine being connected to it.. I think the answer is yes… but I want to be sure..

One more thing.. any suggestion for the stand alone ECU?!

gakz · Jun 1, 2011

s60pro DTA ECU was used on the other guy's car. There are not a lot of dealers of that specific model in the US, it originates from Europe.

I see you are from Jordan, so your best bet is to look at the specs on a complete Stand alone ecu (s60pro) and find one similar that has a tuner in Jordan.. You'll also want a copy of wiring diagrams for our ECU, as it will help any shop tune a standalone for your car... saving a little cost

Kobus · Jun 3, 2011

AMJAD90 said:
32krazy!

Now the question I hope you can help me with.. will the original ECU keep working and managing everything else in thecar without the engine being connected to it.. I think the answer is yes… but I want to be sure..

Probably not, since the ESP/ABS etc. all interfaces with the ECU. For example, if the ESP system detects a wheelspin/slide, it communicates to the ECU to reduce power.

AMJAD90 · Jun 4, 2011

gakz

I think I’ll do that.. I have in mind couple of ECUs which I think we have tuners for them..

For the ECU diagram I tried to find it on the net. But I couldn’t.. if you can help me with that I’ll really appreciate it a lot..

Kobus

I agree with you in the ABS and the ASR thing.. but a lot of the stand-alone ECUs have their own ABS and ASR management.. and I think I can wire the original sensors to the new ECU.
If I can’t I’ll just ignore the ABS and THE ASR and drive in the dyno mode.

If you have any other ideas or anything you think might not work either please let me know..
Thanks for the help.

Kibim · Jun 6, 2011

Hey Amjad

The answer is absolutly yes you can turbo the 200k motor. The question is that of what management to use. I've turbo'd a few cars, also upgraded stuff, and the most reliable stand alone ECU is the one your tuner knows how to work. That's the biggest problem. They all work in a fairly similar way, but the tuner himself (or you!) has to know how to work it.

One of the best units I've come across is the XMS system from Perfect Power (PerfectPower). Not too many tuners know it tho, so that can be your biggest hurdle. That being said, I installed one myself on a Volvo and got it to work in conjunction with the original EMS, so I still had all my dials/ABS etc.

There is a simpler way of doing the whole fueling mapping however, and that's with a piggyback or just a fueling ems. Basically you add another 1 or 2 injectors post throttle body on the intake, and activate them completely independantly of the standard merc EMS. It doesn't even know about them. This 'may' not work on the Supercharged engine as it probably has an Absolute Manifold Pressure sensor, and will fuel specifically to that, and it will have limit points progammed so you can't exceed certain pressure settings. (all speculation as I've not turbo'd one of those engines)

If I were you however, I would keep the SC, get a pully kit and an ECU reflash (Kleeman) for some extra power. Cheap and easy for a few HP gain, should put you well above 220hp.

Then, if I REALLY wanted to play, I'd add a turbo to the SC setup, with the SC output feeding the exhaust wheel of the turbo. So you have a more permanent boost. It's a tricky setup, but I've seen it done on a few M3's and some other marques too with some huge success. It's a lot of custom fabrication work however.

Some stuff to think about.

Subby_ · Jun 7, 2011

have you used any online tools for turbo size selection?

Ray Hall Turbocharging - Java turbo matching calculator for example

the one which will most likely fit is the Garrett GT25 (good for 260-300hp). on a 1.8lt motor (slk200) pushing 14psi (1bar) it would get 230-240hp. cranking the boost to 20psi estimates around 280hp. 20psi would be way above the turbos efficiency range

using a kleemann pulley kit it will end up at around 200hp-215hp.... getting another 25hp for mega $$ may not be worth it..

Billy22Bob · Jun 7, 2011

Shame - I jost sold my Kleeman K-Box for the M271 1.8L engine.
Not sure it would have done much for you though.

b22b

Subby_ · Jun 7, 2011

i know most of garretts turbos will require both oil and water lines to be tapped. how will the standard cooling system handle the heat?

snake66 · Jun 7, 2011

Subby_ said:
i know most of garretts turbos will require both oil and water lines to be tapped. how will the standard cooling system handle the heat?

The whole ideia of the SC driving the turbo is very interesting, and the heat factor, in my ignorance, i believe would not be such an issue, the standard turbo set-up generates a huge amount of heat due to the fact the exhaust gas is driving the turbo, thus, very hot, the air comming out of the SC will never reach the same temperature levels, not even close.

The standard I/C can be used to cool down the pressurized air from the turbo, and surely, the oil and waterlines can be "tapped" into in some way.

As far as the turbo size, this can be overcome by the variable vane models, used in Porsche, VW/Audi, and in europe, Fiat models, as well as by M.B.

The only downsides / dificulties i can see are:

Pluming - large amount of additional pipping to be added

Electronics - As always, the most espcialized and dificult area

Space - We dont really have much

Cash - On a conversion like this, very good HP can be gained, but, at what price?

Never the less, i would love to see one of these "beasts" come out.

Best regards to all :thumbsup:

TURBO on a slk200

AMJAD90

isarescu

AMJAD90

snake66

dynhm6

Subby_

32krazy!

gakz

AMJAD90

AMJAD90

32krazy!

AMJAD90

gakz

Kobus

AMJAD90

Kibim

Subby_

Billy22Bob

Subby_

snake66

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