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TURBO on a slk200

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#21 ·
loriser already did a turbo kit back in the day (for slk230) and it didnt significantly get much more power than tunning the supercharger. only 180kw/245hp MAX. it was running approx 11psi/0.8bar.

there is a reason why it got scrapped. they money needed for the power gain didnt stack up...
 

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Discussion starter · #22 ·
Kibim

First of all thanks for answering with YES :D
I can think in couple of stand-alone ECUs that I can find someone who can tune them here.. so that is something I hope I won’t have any problem with.. on the other hand I think I’ll have a problem in wiring the two ECUs together!!

Adding new injectors is something I’m not liking.. because I think I’ll have a problem with the sensors and all as you said.. so that is out of my mind.

The kleeman kit.. will, the pulley kit is around 945 euro without shipping.. and I think that anything to do with the ECU would be even more expansive. So it will be around 2500 euro.. if not more!! And it will only go to 220 hp.. again as you said.. but that won’t be enough for me ;)

Now the thing you said about the s/c and linking it to the turbo.. now that is a great idea... thank you for it :D and I’ll sure think about it when I do this whole thing..

Thank you man for posting :)



Subby_

I agree with you about the turbo.. but one thing is that the slk has a 2000lt motor.. a different in 200ltrs will make a small different :)
With a 1 bar of boost we will be talking about 250 hp.. ( I hope :D ) which is good..

For the cost issue.. the kleeman kit will get me around 205 hp.. which I probably won’t even feel. And that will be for around 1000 euro…
The turbo kit with everything included will cost me (I HOPE) around 2000 to 2500 euro.. for 250hp and the TURBO feeling (which is much greater than the s/c) I think it’s worth it.. don’t you think so?!

I really thank you for your participation :) and for your ideas...
 
Discussion starter · #23 ·
Billy22Bob

Thanks for the post :) and I don’t know actually..


Subby_

I forgot to answer to this.. if my standard inter cooler can’t handle it, I’ll just change it ;)


snake66

thanks for posting again :D

the cooling this as I said to subby.. simple if the original inter cooler can’t handle it, I’ll just change it with a bigger and a better one ;)

the turbo size is something I’ll worry about when its time comes.. although I think it won’t be a problem..

now for the difficulties:
Pluming: I agree with you.. but that won’t be a big problem.. everything can be manually done.. and I think we will able to do it very well :)
Electronics: this is the scary part.. but I really hope I’ll be able pass it..
Space: that is not much of a problem.. we can always find a solution for this..
Cash: I’m expecting the whole cost will be around 2000 to 2500 euro.. maybe less.. but I’m considering the worst case.. what do you think?! Worth it!?

Thank you again :D
 
#24 ·
the loriser slk200 made 182hp at 7psi/0.5bar. (the older slk200 made 161hp stock form at about the same psi/bar).

so there was around 20hp "gain" (freeing up hp) just by swapping the supercharger for a turbo because it was no longer using engine power to spin it.
 
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Discussion starter · #25 · (Edited)
Subby_

First of all thank you for your sharing and helping :D I really need it…

I like the picture and the idea in connecting the original paddle to the outlet of the turbo.. that might come in handy ;)

From what I understood is that they just exchanged the supercharger by the turbo to save the hp which the supercharger uses when it’s running..
So they probably didn’t change anything… even in the electronics or in the ECU since they are using the turbo at the same boost as the original supercharger..

Now that is a nice idea in general.. I think I’ll use if couldn’t solve the ECU problem or if something else stopped me because that seems easy to do. And since my slk does a 192 hp stock.. so it might hit 215 by just an exchange procedure. and i'll ge the TURBO feeling ;)..

Again I really thank you for helping out :) and for posting more than once :D thanks.
 
#26 ·
the only thing i can think of which will cause dramas is the MAF/MAP sensors. on the newer SLK's they have a MAP sensor which messure manifold pressure. the older cars only had a MAF sensor which doesnt have a clue about "boost" only air flow.

ramping up the boost significantly past stock or what the MAP sensor is calibrated for will probably throw a check engine light or fault code or possible put car in limp mode.
 
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#27 ·
Subby_ said:
the only thing i can think of which will cause dramas is the MAF/MAP sensors. on the newer SLK's they have a MAP sensor which messure manifold pressure. the older cars only had a MAF sensor which doesnt have a clue about "boost" only air flow.

ramping up the boost significantly past stock or what the MAP sensor is calibrated for will probably throw a check engine light or fault code or possible put car in limp mode.
Click to expand...
Even with a MAP sensor you can run a piggy-back to fool the stock EMS into thinking it's maintaining that theoretical limit. (it's only a voltage sender, so easy enough, just clamp the voltage.) Then use that same MAP sensor for the piggy-back to know how much extra fuel to add in on a 2nd injector rail, or even just 1 extra injector post throttle body.

That way, you're not getting the system into limp mode, and you're adding enough fuel to keep things running smoothly and to keep AFR's in spec, which if they weren't would also throw limp-mode.
 
Discussion starter · #28 ·
Subby_ I think Kibim gave you a good answer…
Now using that is one of the solutions but I’m still tending to use a stand-alone ECU.. probably will manage the engine better..

A question I have which no one answered me… will the interior (pistons and head gasket )of the engine handle the Turbo pressure at 1 bar boost!! If it does then there is nothing I can’t solve.. I hope..

And If anyone has any more ideas please let me know..
 
#29 ·
how will you handel the adjustable camshaft solenoid? that wont engage if other stuff is off and with it not enaging correctly at the right times you loose a fair bit of power.

i dont think ive ever seen anyone run a full standalone system (doing both fuel & spark)... only piggyback type systems which intercept MAF/MAP signals to control fueling.

i think one of the difficulties was the crankshaft sensors output... most aftermarket ECUs cant understand it and you have to wire your own. theres another sensor but i cant rememeber what it was
 
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Discussion starter · #30 ·
Subby_

mmmm.. that's something i didn't think of..
but i think and hope that the ECU i have in mind will be able to handle these sensors.. if it won't then i'm sure we can find a way to wire it and make it work..

as i said.. if someone can assure me that the inside of the engine (pistons and head gasket) will handle the power and boost coming from the Turbo then everything else is doable. i Hope..

and again.. if anyone have the ECU wiring diagrams i'll be very thankful..

thanks all
 
#31 ·
the inside of the engine can handle over 350RWHP/350RWTQ.. about 400hp at the crank its good for. A build i've posted about before has been done in DTM race car with a M111 from a 99SLK, internals untouched and made that much power
 
Discussion starter · #32 ·
that's so great to know gakz
THANK YOU SO MUCH :)

since that is no problem then the only thing i have to worry about is the MAF sensors and the fuel injectors.. i hope that won't be a big problem..

and if can give me that post of yours about the TDM race car then i'll be much more grateful although i'm already grateful for you :)
 
#33 ·
heres more info from the guy who turboed his M111 motor (same as ours) in a c class.



Stock pump should hold at least 340hp@wheels,we had no drop in pressure at that output.

Regardless of whats on the crank its a larger 4 cylinder without balance shafts...you will experience some 2nd order harmonics,make sure you build a heavy duty header,dont piss round with stainless.

the engine uses internal re-circulation - ie alot of overlap that spits exhaust up the intake,you will have trouble when it comes to getting alot more fuel and air in the chamber,remember this engine is set up for SC with relatively low back pressure,once you increase backpressure,intake pressure and fuel it tends to exaggerate the problem. You might want to degree the engine and speak to some cam builders about the project,it might save you some tuning problems in the future.
Not only does the overlap cause fuel problems,but with added backpressure/intake pressure i believe also causes uneven combustion pressures because of differences in exhaust and intake runner restriction.
These are some of the problems i had with mine...partially due to the exhaust/intake manifolds...but more so due to the stock cam setup.


he is right the stock cam allows for a fair bit of overlap which will cause issues in a turbo setup
 
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#34 ·
That is a different setup than the DTM set up. I think you may be referring to Pagz, he made a custom intake manifold and a complex turbo manifold.. both of which are un-needed. Its sort of baffling the lack of success he had on his... considering the guy that installed in his DTM said how easy it was for him, and the lack of problems he encountered
 
Discussion starter · #35 ·
Hello everyone, especially Subby_ and gakz…
Sorry for not replaying for a long time, but I was out of the country in a vacation, and then I didn’t have time to go to the mechanic because of work..

Any way.. now to the important talk.. yesterday I went to the mechanic :D at last.. and this is what we came up with:

- The engine will handle the turbo well ..
- We will use one of these universal turbo kits to minimize the manual fabrications as much as we can.
- The turbo manifold will probably be done by hand.
- The turbo size and type will be determined later with the progress of the work, but probably will be a Toyota’s or a Subaru’s .
- The ECU, the sensors and everything else will be solved by using a standalone ECU. I will be using OMEGA ECUs which they can tune very well here..

Now we will starts looking for the parts, and hope I’ll find everything I need…

Any questions or ideas you have please let me know..
 
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