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  Topic Review (Newest First)
11-13-2015 03:16 PM
u_2504 So, I had the tuning box and exhausts removed today - bumping this thread.
My lord, the car is SO slow and boring. It needs to be thrashed to move.
If I had my time again with the slk, I'd definitely get the 250 diesel and tune the heck outta it. Dpf remap intercooler exhaust.. the works.
To everyone who has the 200... definitely do get it tuned... you won't believe the difference. I wish a few more of you drove mine!
07-16-2015 02:25 PM
Maurauth
Quote:
Originally Posted by bastivock View Post
it's a bit of a barge and the handling's not good enough, if I wanted that I'd buy a boxer and be done with it.
This is the only bit I disagree with, with the right setup these cars are spot on. I've owned a couple of MX-5s which are meant to be the holy grail of budget value meets perfect 50/50 weighted RWD handling. Also consider the fact that a big V8 weighs quite a bit more than a small 4cyl turbo changing weight distribution etc

If I'm honest there's not many corners that I have to take slower in the SLK than I did in the MX-5, and we're only talking about a couple of MPH difference here, and with the extra turbo power on tap to track-out of the corners I find the SLK better.

I tried out the Cayman and the Boxter. I quite liked them but they're just a bit bland for my liking; a slow Merc is understandable, the SLK is a proper roadster blah blah blah but a slow Porsche just doesn't make sense!

As an aside, I went out a month or so ago on a run with a few really nice cars and fair enough on the straights I couldn't keep up with the McLaren and 911 Turbo that were in front of me, but this was on good old british country lanes, so there aren't that many straights, and my corner entry and exit speeds were of a very close parity to both of them, considering they could enter the corners at a much higher speed than I could coming down a straight.
07-16-2015 08:32 AM
u_2504
Quote:
Originally Posted by bastivock View Post
u_2504: Thanks for sharing your experiences on the forum but please don't be so harsh on people who disagree with your viewpoint, it's probably not helpful to your case.

Maybe the engine can tolerate this level of tuning and you personally are prepared to accept any associated reliability risks to your vehicle, but I do think it's wise to point out to others that there IS an increased risk.
Hi Bavistock
Sorry for my tone, the bottom line is that it's easy to scaremonger folks by saying "there's disaster threads" somewhere on the forum and that immediately puts people off. We need to be guided to those threads to see what actually happened, under what circumstances.

There's a finite number of people who have tuned their SLKs. I read on another forum site that a guy had his SLK 200 remapped (not tboxed) to 244hp with no reportable issues except for the same power loss in the heat that I have as of recent.

There is going to be more risk, there's a marginal additional strain on your components but nothing WAY out of operating limits. Ultimately, what's the worst that could happen? a turbo blows out? They are approx 700 to replace: weighing up the risk vs reward?
I now have a competitively performing sports car, which I feel is on par with many other higher performing cars on the road. I still get the fuel economy when required and that's good enough for me.
It is worth noting that the box does not allow the car to perform outside of safety limits (according to MSL.) The various connectors are taking readings all the time and that's why it's rare the car performs EXACTLY the same under certain conditions.
Other components that maybe of concern are the gearbox. It maybe the placebo effect but the gearbox actually feels BETTER with the box. Before, the car would kickdown 2 sometimes 3 gears when overtaking on the motorway, but now it often can hold the gear during an overtake.
My driving style changed after the box, the engine doesn't need to be thrashed to get the push now.

Anyhow, it's a "if you can, do it" thing. If you don't want to take risks, don't
Who wants a stock car anyway
07-16-2015 06:22 AM
Maurauth
Quote:
Originally Posted by wja96 View Post
If you're searching for SLK there is no point. You need to search on the engine number and for E and C class failures. It is the same engine. GAD tuning are sponsors of the MBUK Owners forum and a lot of the posts have been pulled down. I'm surprised no-one has just phoned GAD in the course of their research. If they used to offer a tune and no longer do or now offer a much lower tune then surely they'll tell you?
I thought that despite being the M271 EVO engine the C-class versions were at a lower state of tune originally so might be less receptive than our cars?

It's good though that most of the aftermarket parts bolt onto ours. The only downside is that Kleeman's C-class de-cat downpipe and headers kit doesn't fit the SLK. I've not had a proper look but the engine bay doesn't seem that different between the C250 and SLK250. Maybe the exhaust parts are different, hard to tell without getting both on a ramp side by side I guess.
07-16-2015 12:05 AM
wja96 If you're searching for SLK there is no point. You need to search on the engine number and for E and C class failures. It is the same engine. GAD tuning are sponsors of the MBUK Owners forum and a lot of the posts have been pulled down. I'm surprised no-one has just phoned GAD in the course of their research. If they used to offer a tune and no longer do or now offer a much lower tune then surely they'll tell you?
07-15-2015 08:52 PM
bastivock By the way, my 20 yr old MR2 Turbo (also a 2l petrol engine) puts out 264 bhp with just a non standard exhaust and a less restrictive air filter (up from 245 bhp with original parts) but I could easily get close on 290bhp by fitting a manual boost controller and upping the boost pressure a smidgeon with no other work necessary. I haven't bothered... I'm pretty sure it'd slay any standard SLK short of an AMG55 as it is, plus I no longer think it's acceptable to do this kind of stuff on the public highway.

Oh, the joys of old skool engineering!
07-15-2015 08:40 PM
bastivock Well, my first reaction was, if MB offer an upgrade to the 200CGi in the form of the 250CGi on what is essentially the same engine, why wouldn't they turn the dial all the way up to 11 and offer a 280CGi with say 240 bhp instead if they could do it reliably?

However, with the 2016 MY MB now offer the 300CGi with 245 bhp from the 1,991cc lump. So maybe it is OK... BUT we don't know if there are any other modifications to the engine to cope with the increased output.

The thing is, if you buy a 2016 MY 300CGi from MB, they will stand behind it with their warranty but if you bolt on a box of tricks and the engine goes pop, who you gonna turn to ... Ghostbusters?

Gotta say, a non AMG55 (although a 55 is great in a straight line) strikes me as a strange basis for a performance convertible... it's a bit of a barge and the handling's not good enough, if I wanted that I'd buy a boxer and be done with it. In my opinion an SLK is not a real sports car and it's a waste of money trying to to make it one.
07-15-2015 08:23 PM
Maurauth Would be interested to see any information about issues with these engines as I'm seriously considering going down this road and want a balanced set of views; not just the supporters but people who think it's a bad idea as well.

Do you have a link to the issues on another forum with tuning this engine?

I didn't expect to be able to gain so much from a small petrol engine by just remaping so it does seem possible there could be a greater than normal chance of risk considering the gains.

Are these being over inflated or disregarded is the question.
07-15-2015 07:59 PM
bastivock u_2504: Thanks for sharing your experiences on the forum but please don't be so harsh on people who disagree with your viewpoint, it's probably not helpful to your case.

Maybe the engine can tolerate this level of tuning and you personally are prepared to accept any associated reliability risks to your vehicle, but I do think it's wise to point out to others that there IS an increased risk.
07-15-2015 03:55 PM
wja96 If you are really that smart how come you posted that you have raced on the road and broken the speed limit on multiple occasions AND posted pictures of your car where the registration number UZ6818 is perfectly legible?
07-15-2015 07:01 AM
u_2504
Quote:
Originally Posted by wja96 View Post
So you've got a 28% increase in power and a 37% increase in torque. Brabus get about half of that increase with hardware modifications.


Yup

It's great to know that you're responsible enough to stop racing in the 60 zone on the A45. Well done.

Thanks

I don't understand your point here. You say they don't expect massive gains from the engine but they've got 57bhp extra from just a tuning box (as much extra as they would get from the SLK55 apparently) AND they've not tuned one before yet you disregard the reports on the MB UK Owners Club forum where remaps producing less additional power and torque resulted in catastrophic engine damage. It's your car. You can do what you want to with it and I really do hope that yours doesn't destroy itself while you're racing on the public roads.
Okay lets break this down, as it appears you have some extra chromosomes on your side...
1) The 1.8L engine is used in both the 200 and the 250. They are EXACTLY the same engines, same components, everything is EXACTLY the same, as can be verified from your local dealer, for example. The 200 has c. 181hp/270nm and the 250 has c. 201hp/310nm. So, the engine is comfortably capable of extracting 20 or so HP extra just by means of the tune.
So the ACTUAL adjusted difference I have gained is 38hp with 63nm of torque. That is perfectly comfortable from most turbo'd engines, not just mine.
2) Disregard what reports? I spent 8 months researching tuning options for my car. There is NOTHING ANYWHERE that I have read that stipulates that tuning on this engine is dangerous, or that i'm going to go to certain death at 25k miles with what has been done to my car. Do not scaremonger folks, it's not productive. The ONLY thing I have ever read saying anything negative about tuning boxes is a tuner in Singapore who fried an injector on a DIESEL CLA using a RaceChip. Do you know how many factors could have contributed to that? That's what I thought.
3) Yes, it is my car. It's a beautiful, head-turning, erection inducing car. It's a fast car. I worked 17 hours a day to save for that car. You're DAMN RIGHT it's my car. It's my engine too, obviously being part of MY CAR ofcourse, so I can do what I want to it. I have a clean license, 2 years NCB (and NO ACCIDENTS OR BUMPS OR SCRAPES), Pass+, IAMS, skid pan training, 10+ track days in differing conditions and covered 170,000 miles across 4 cars and i'm not 21 yet. I'm not a moron, I am fully aware of the risks associated to a car of that caliber and will not take unmitigated risks with my life or anyone else's.
Now with the greatest of respect, gtfo this thread and have a great day, jerk off.
07-14-2015 10:17 PM
u_2504
Quote:
Originally Posted by Maurauth View Post
That's great news! Was it acid you dealt with? Really interested in going down this route!

What branded box was it?
Hey!
It was, he's become a family friend now his younger brother Samir spent the whole day working on my car but between both of them, they got the gains.
I'm not sure, I'll open the bonnet in the morning and see if I can find out.
Take the plunge, I promise you won't regret it. Mention my name to Acid (Uzzi from Coventry) I'm sure he will give you something off.
Uzx
07-14-2015 07:37 PM
Maurauth
Quote:
Originally Posted by wja96 View Post
So you've got a 28% increase in power and a 37% increase in torque. Brabus get about half of that increase with hardware modifications.




It's great to know that you're responsible enough to stop racing in the 60 zone on the A45. Well done.



I don't understand your point here. You say they don't expect massive gains from the engine but they've got 57bhp extra from just a tuning box (as much extra as they would get from the SLK55 apparently) AND they've not tuned one before yet you disregard the reports on the MB UK Owners Club forum where remaps producing less additional power and torque resulted in catastrophic engine damage. It's your car. You can do what you want to with it and I really do hope that yours doesn't destroy itself while you're racing on the public roads.
Have you any links to this, as I've not found anything about tuning these engines nor about any dangers?
07-14-2015 03:48 PM
wja96
Quote:
Originally Posted by u_2504 View Post
BEFORE
186hp at 271nm @ 3500rpm
0-60mph - 6.9 seconds (bone dry, recorded with an iPhone GPS stopwatch + using brake boosting to mimic launch control.)
Top speed - 147mph (ran out of road)

AFTER
239hp at 373nm @ 3000rpm
0-60mph - 5.8 seconds (same conditions as stipulated above)
Top speed - 155mph (on the same road, with tarmac to spare)
So you've got a 28% increase in power and a 37% increase in torque. Brabus get about half of that increase with hardware modifications.


Quote:
Originally Posted by u_2504 View Post
The car performs totally differently now, honestly, it's like driving a totally different animal.
Since, I have been able to shatter the ego of many 4 series drivers (which are dangerously common in the Midlands.) The best driving encounter I had was against a 981 Boxster 2.7 where we remained neck and neck upto around 90mph before the 60 limit on the A45. The fuel economy is unchanged at 22mpg in the city and around 30mpg on the motorway at cough 80 cough 85-90 cough M40 to London cough.
It's great to know that you're responsible enough to stop racing in the 60 zone on the A45. Well done.

Quote:
Originally Posted by u_2504 View Post
Someone mentioned that GAD tuning said the SLK 200 has a 'chocolate engine.' I asked about the reliability of this engine at 3 different tuning houses and they all said the same thing - it's a sub 2L turbocharged engine and the gains are NOT going to be massive (with a comparatively SMALLER customer base... seriously how many SLK's do you see compared to the 3/5 series on the road?) so tuners dislike spending lots of time and money on R&D as the return won't outweigh the initial investment. It is not an E55 with a huge engine where an extra 60hp can be achieved with no real effort, just a simple remap!

MSL showed me there Dyno folders and my SLK was the first one they have EVER had tuned (and they had nearly 2,000 C63's tuned!!!) so this goes to show it's too much of a niche.
I don't understand your point here. You say they don't expect massive gains from the engine but they've got 57bhp extra from just a tuning box (as much extra as they would get from the SLK55 apparently) AND they've not tuned one before yet you disregard the reports on the MB UK Owners Club forum where remaps producing less additional power and torque resulted in catastrophic engine damage. It's your car. You can do what you want to with it and I really do hope that yours doesn't destroy itself while you're racing on the public roads.
07-14-2015 02:32 PM
Maurauth That's great news! Was it acid you dealt with? Really interested in going down this route!

What branded box was it?
07-14-2015 12:42 PM
u_2504 FYI, attached is a picture of my babygirl on the Dyno!
All the best
Uz
07-14-2015 12:16 PM
u_2504 Dear All!

Good to meet you, i'm Uzzi.

I have been following this thread for nearly a year since I bought my 2013 SLK 200 from MB Macclesfield. As I was 19 when buying the SLK, insurance happened to make my life difficult with the larger engine variations so stuck to the trusty 200, the intention being to modify it in due course. So after seeing the back and fourth of some members, between RaceChip / Kleeman / Brabus etc I decided to take the leap and make some modifications when my service B1 was due. Another modification I have is a custom backbox made by Exhausts UK in Sheffield which gives the car a deep throaty sound, similar to the 55 variant. The pops and bangs are included.

I contacted a place called MSL Performance (in Birmingham, West Midlands) to investigate my options, recommended by my Uncle who owns a 600hp E55 AMG. I opt'd for a box given my warranty and the relative ease by which a tuning box can be removed, however, remaps are the better option in the research I have done. These have all been verified on a dyno & done on Tesco 99 momentum:

WITH THE ROOF UP!

BEFORE
186hp at 271nm @ 3500rpm
0-60mph - 6.9 seconds (bone dry, recorded with an iPhone GPS stopwatch + using brake boosting to mimic launch control.)
Top speed - 147mph (ran out of road)

AFTER
239hp at 373nm @ 3000rpm
0-60mph - 5.8 seconds (same conditions as stipulated above)
Top speed - 155mph (on the same road, with tarmac to spare)

The car performs totally differently now, honestly, it's like driving a totally different animal.
Since, I have been able to shatter the ego of many 4 series drivers (which are dangerously common in the Midlands.) The best driving encounter I had was against a 981 Boxster 2.7 where we remained neck and neck upto around 90mph before the 60 limit on the A45. The fuel economy is unchanged at 22mpg in the city and around 30mpg on the motorway at cough 80 cough 85-90 cough M40 to London cough.

The only mods I have are the box, backbox, wider 255/35 on the back and 245 on the front to accommodate the black AMG alloys I purchased separately. No K&N etc.
The next mods I am looking to make are:
1) Lowering springs (10mm tops)
2) Bigger brakes
3) Air filter of some description
4) Uprated intercooler.

It is important to note that I have now covered 4,000 HARD miles on the box, and yes the first 50 miles were very jerky. I was almost anticipating the EngineMLight to come on but stick with it, the car does adapt. The 7G tronic + gearbox is not jerkier, it feels more 'at home' now however sometimes you do hit the limiter as the first gear is almost eliminated with a kickdown acceleration from a standing stop. The gearbox feels more responsive also. This is all well and good until you get a hot day, as of recent in the Midlands, at which point the car often feels like it's lost 20hp but this is apparently common with turbo'd cars and I figured the box is detecting the temperature and restraining power to prevent the engine overheating (hence why I want an uprated intercooler.)

The box MSL used had 5 different connectors (please excuse me for my automotive ignorance if these are wrong) but I recall a connector to the: throttle response unit? / temperature / turbo / fuel injection system? & one other. I did not ask what brand of box they used as I felt rude, however they charged me 400 and a further 50 on the dyno. I had my B1 service done by them for a further 250 using MB approved parts.

I am very happy with the car now... Currently saving towards the SLK55 and keeping some money stashed away incase of engine troubles down the line but only realistically hoping for another 6 months of reliability until upgrading. I do treat the car like a baby though, always letting it warm up, cool down. It goes through tyres like candy, shredding 4mm every 2-3 months but it does get driven.

Someone mentioned that GAD tuning said the SLK 200 has a 'chocolate engine.' I asked about the reliability of this engine at 3 different tuning houses and they all said the same thing - it's a sub 2L turbocharged engine and the gains are NOT going to be massive (with a comparatively SMALLER customer base... seriously how many SLK's do you see compared to the 3/5 series on the road?) so tuners dislike spending lots of time and money on R&D as the return won't outweigh the initial investment. It is not an E55 with a huge engine where an extra 60hp can be achieved with no real effort, just a simple remap!

MSL showed me there Dyno folders and my SLK was the first one they have EVER had tuned (and they had nearly 2,000 C63's tuned!!!) so this goes to show it's too much of a niche.

Wishing you all the best
Uz
06-27-2015 06:19 PM
Maurauth I'm gonna bump this thread as I'm sure SOMEONE has done some sort of ECU tuning by now on a 4cyl?

Not sure if the best bet is to go cheap, or shell out for Brabus/Carlsson or find someone to do it by hand for a price somewhere in the middle without knowing where the map would end up on the scale of racechip to Brabus!

I'm sure at least the custom map would be made to suit de-restricted exhausts but IDK how much experience of tuning this engine is required for a professional?
01-11-2015 10:03 AM
jetski jezz Another bump from me.
Im a newbie on here, signed up so I can find out some more about this whole plug in chip thing.
I have the 250 diesel and I understand the chipmaker more of a difference to the diesel than it does to a petrol version.

There is a UK-based guy on here who has written up about the "race chip" which he has installed and he says makes a difference. I've just posted on his thread to ask for an update as I think it was over 12 months ago he installed the chip, so would be great to see what he thinks to it further down the line.

I can't believe I give such massive increases for the price, some of the ones I've looked Stating nearly 300 hp and 600 N metres of torque which seems like a huge increase for not a large amount of money. What I can't understand is how a legitimate company can post claims like this if they're not true.
12-20-2014 11:15 AM
lewi_hoga Bump anyone used racechip or brabus b20s on 200 cgi yet?
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