SL55AMG

[Cyclone1]

mikial said:

phumy said:

Cyclone1 said:

Hi,

Ideally you need to post up the graphs back to back to show before and after. It may be possible to see if there are any anomolies between the way the two runs were done that could explain the high gains.

Does anyone know which pulley is changed as part of the upgrade packages offered by the companies mentioned already? Is it the supercharger pulley or the "crank" pulley?

Cheers
Jules.

You would logically only change the charger pulley, if you did the crankshaft pulley and something else is driven from that pulley then the ratios would need to be chganged on those too, i.e. alternator and power steering. So by only changing the charger pulley you keep everything else the same.

It`s the crank pulley that DMS replaced on my SL55, it appears there are two tensioners and the supercharger only on the loop.

Thanks for the replies.

I've read that the better option is to have the crank shaft pulley replaced, maybe this explains the price difference between DMS and Paramount?

I reckon pulley and remap should be good for an additional 60-80bhp and similar torque.

Jules.

[asman0161]

For your pulley google evosport mercedes, Evosport specialise in upgrades for the 55k engines.

[nick355gts]

I too am keen to understand the "real" benefits of the remap and pulley as well as the noise improvements on the pipe mods.

I think Paramount can do the remap/pulley and rolling road for £1300 ish.. which is way less than DMS for what appears to be the same thing??

Anyone got a view on value for money on this upgrade and is the supposed 70-90bhp and torque gains noticable in the real world?

Cheers

Nick

[B15TT0]

asman0161 said:

The resonator mod is a very common mod. I got a quote for £110 for replacing it with stainless steel pipes on my e55, But before i do it, I would want to hear it in person. I am 90% sure about doing it. It wont be too loud just loud on wide open throttle, At idle you cant even tell the difference just dont want any drone on the motorway.

Same here but no one in the UK seems to have actually done it. Sod it, I think i'm just going to get it done. Drone wise I put up with a C5 Vette with SLP Loudmouths on it for 2 years..(WOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOORRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH)

So if anything it's likely to be too quiet for me even after the work.

[mikial]

B15TT0 said:

asman0161 said:

The resonator mod is a very common mod. I got a quote for £110 for replacing it with stainless steel pipes on my e55, But before i do it, I would want to hear it in person. I am 90% sure about doing it. It wont be too loud just loud on wide open throttle, At idle you cant even tell the difference just dont want any drone on the motorway.

Same here but no one in the UK seems to have actually done it. Sod it, I think i'm just going to get it done. Drone wise I put up with a C5 Vette with SLP Loudmouths on it for 2 years..(WOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOORRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH)

So if anything it's likely to be too quiet for me even after the work.

Sod it here too, ...talked to my local welder not 20 minutes ago, so in ten days hence......off with the resonators !!!

[mercedes tech]

Removing the resonators makes a nice subtle difference, it is very very slightly more droney. But it is not really noticable, drone wise. It seems to burble a bit more, more throaty.
Having done it to my personal car id recommend it. But leave the x pipe, it serves a purpose.

[mikial]

mercedes tech said:

Removing the resonators makes a nice subtle difference, it is very very slightly more droney. But it is not really noticable, drone wise. It seems to burble a bit more, more throaty.
Having done it to my personal car id recommend it. But leave the x pipe, it serves a purpose.

Thanks for the advice Shane, the "tech" doing mine said the same thing , he`s a good local indie who worked on my

Griffiths exhaust a while ago.

[Cyclone1]

mercedes tech said:

Removing the resonators makes a nice subtle difference, it is very very slightly more droney. But it is not really noticable, drone wise. It seems to burble a bit more, more throaty.
Having done it to my personal car id recommend it. But leave the x pipe, it serves a purpose.

Shane,

What are your thoughts on remap / pulley change (crank shaft v supercharger)?

Jules.

[christer]

mikial said:

I was informed by the DMS technicians when they installed the relevant software and other implements that 80bhp/80 lbft torque was added to the output of the supercharged V8 installed in my SL55.
.

Well, if they *informed* you then it must be true.

[christer]

carrera2s said:

Got my car back and all ok after fitment of 16no new spark plugs full check over.

Charge cool pump changed seems to have been the problem!

[christer]

mercedes tech said:

I diagnosed the problem,
There is still a very slight misfire on the engine, whether or not the customer notices this?? but i did and so does the star machine, customer informed of this. And having owned 2 55amg kompressor cars, both dms'd, and driven many more, i can say that it is not running to full power.

cylinder 1 and 2 were 50psi down on compression, explaining why not running on full power,

spark plugs had broken up, both electrode and ceramic on 1 and 2, upon inspection with boroscope cylinder 2 was quite noticably scored, cylinder 1 also but not as bad.

Upon removal of plugs it was noted that towards the front of engine, furthest away from fuel inlet, it had been running quite lean/hot, charge cooler issue? fuel pressure issue?, we did not go any further ie fuel pressure checks, as per customers request.

the spark plugs were overdue changing, age dependant not mileage.

The engine has not been rebuilt, the customer was happy with the way it was running after new plugs installed.

fk me......

and the owner says it seems to be fine now....

There seems to be some funny stuff being smoked in this thread........or there is some serious retardation^^

[mikial]

christer said:

mercedes tech said:

I diagnosed the problem,
There is still a very slight misfire on the engine, whether or not the customer notices this?? but i did and so does the star machine, customer informed of this. And having owned 2 55amg kompressor cars, both dms'd, and driven many more, i can say that it is not running to full power.

cylinder 1 and 2 were 50psi down on compression, explaining why not running on full power,

spark plugs had broken up, both electrode and ceramic on 1 and 2, upon inspection with boroscope cylinder 2 was quite noticably scored, cylinder 1 also but not as bad.

Upon removal of plugs it was noted that towards the front of engine, furthest away from fuel inlet, it had been running quite lean/hot, charge cooler issue? fuel pressure issue?, we did not go any further ie fuel pressure checks, as per customers request.

the spark plugs were overdue changing, age dependant not mileage.

The engine has not been rebuilt, the customer was happy with the way it was running after new plugs installed.

fk me......

and the owner says it seems to be fine now....

There seems to be some funny stuff being smoked in this thread........or there is some serious retardation^^


T`was no retardation `till you chimed in


Did you sell the 964 ?

[christer]

OK, so I could have put it better. The owner comes back and says all is ok now the spark plugs have been changed, and it would seem the car has some very serious issues potentially. That was what I was referring to - and I wouldn't consider that retarded from me. Spark plugs overdue for replacement? Ever heard of maintenance?

I sold the 964 almost a year ago, and still miss it every so often. the new owner is selling it because he wants to get back into a 360 at a very good price - but I don't want to buy it back right now. I will have to try to keep tabs on it^^

Edited by christer on Thursday 2nd July 15:18

[Carrera2s]

christer said:

OK, so I could have put it better. The owner comes back and says all is ok now the spark plugs have been changed, and it would seem the car has some very serious issues potentially. That was what I was referring to - and I wouldn't consider that retarded from me. Spark plugs overdue for replacement? Ever heard of maintenance?

I sold the 964 almost a year ago, and still miss it every so often. the new owner is selling it because he wants to get back into a 360 at a very good price - but I don't want to buy it back right now. I will have to try to keep tabs on it^^

Edited by christer on Thursday 2nd July 15:18

All i will say is that what i was told was taken with a pinch of salt as i have had the car looked at by other people who know what they are talking about and the car is running fine.
One other thing i wont be returning or recommending that garage to anyone else either for work on my car or customer relation skills!!!!

[nick355gts]

Not one person came back and "rated" the modifications they have had done with whom, or whether they thought they were good value for money.. does that mean:-

no-one is happy?
everyone is so happy they can't speak
no-one can be arsed to reply? :-)

[Cyclone1]

nick355gts said:

Not one person came back and "rated" the modifications they have had done with whom, or whether they thought they were good value for money.. does that mean:-

no-one is happy?
everyone is so happy they can't speak
no-one can be arsed to reply? :-)

I agree and was also disappointed at the lack of response.

I get the impression that some owners venture into these types of mods without knowing exactly what is going to be done and what the real gains are.

There appears to be only a limited number of outfits who offer the upgrades which doesn't help, but understanding what the actually do and where they source the parts should help in the decision making process and also expain the financial outlay.

[nick355gts]

Agreed! For example

DMS - remap and pulley change to achieve circa 90BHP and 90 LB/FT - no dyno proof included - £3200 but well regarded, although does that mean "value for money"??

Paramount performance, seemingly on discussion the same package but with before and after dyno - £1300 incl

Kleemann - also well regarded but priced around £2800 for seemingly the same (minus dyno), is that the same as above?

Are they the same? why the price difference? Lots of US companies produce these kits so can we get them here and pay an Indi? how does that work for remap?

Anyone got comparisons, who has had what?

[mikial]

mikial said:

mercedes tech said:

Removing the resonators makes a nice subtle difference, it is very very slightly more droney. But it is not really noticable, drone wise. It seems to burble a bit more, more throaty.
Having done it to my personal car id recommend it. But leave the x pipe, it serves a purpose.

Thanks for the advice Shane, the "tech" doing mine said the same thing , he`s a good local indie who worked on my

Griffiths exhaust a while ago.

All done, completed the "resonator delete" Monday evening, it`s a straightforward job, the resonator is replaced with a straight pipe 13.5 inches long.

I`ll be back here to describe the results and more details of the actual job at a later date.

[Cyclone1]

mikial said:

mikial said:

mercedes tech said:

Removing the resonators makes a nice subtle difference, it is very very slightly more droney. But it is not really noticable, drone wise. It seems to burble a bit more, more throaty.
Having done it to my personal car id recommend it. But leave the x pipe, it serves a purpose.

Thanks for the advice Shane, the "tech" doing mine said the same thing , he`s a good local indie who worked on my

Griffiths exhaust a while ago.

All done, completed the "resonator delete" Monday evening, it`s a straightforward job, the resonator is replaced with a straight pipe 13.5 inches long.

I`ll be back here to describe the results and more details of the actual job at a later date.

Mikial,

Look forward to the details as it "appears" to be straight forward and it's something I want to do on my 55 once I get it.

Jules.

[Cyclone1]

nick355gts said:

Agreed! For example

DMS - remap and pulley change to achieve circa 90BHP and 90 LB/FT - no dyno proof included - £3200 but well regarded, although does that mean "value for money"??

Paramount performance, seemingly on discussion the same package but with before and after dyno - £1300 incl

Kleemann - also well regarded but priced around £2800 for seemingly the same (minus dyno), is that the same as above?

Are they the same? why the price difference? Lots of US companies produce these kits so can we get them here and pay an Indi? how does that work for remap?

Anyone got comparisons, who has had what?

Basically they should all do the same thing but it might not be that straight forward. As you've mentioned there are various pulley kits on the market but these can differ from the quality of the actual parts to what is actually included in the kit.

From what I've read (and others may disagree) it is the crank pulley that gets changed and not a supercharger pulley. If you read the US forums then there are various sizes of crank pulley that can be fitted but on the info from the UK based Tuners website it doesn't mention what size these are. It is also not clear as to what parts are used and what exactly is changed, although I am sure that if you called them they would be able to tell you, well I'd hope so anyway. The increases will pretty much all be the same with a pulley kit / map as they nearly all mention a 0.2bar increase, anything beyond this calls for additional cooling mods. I will be getting mine rolling roaded before and after for peace of mind, and this will be done on a dyno that I know very well. It's quite easy for people with less knowledge to live and die by dyno figures when they are unaware that they may not be a true reflection of the gain.

The prices do vary (anywhere from £1300 - £3500) which seems to be a bit extreme, the companies with the strong reputations can afford to get away with this, but it may also be the case that they have a proven track record and a solid customer base. Pay less and you have to weigh up the risks involved. At the end of the day it's all about doing your homework on the pros and cons of all the variables.