Discussion
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.
i would be getting a top end warranty on that pdq.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.
edo 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.
i would be getting a top end warranty on that pdq.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.
Went to Paramount Performance in Slough today. An interesting day to say the least.
The 'before' run showed 490.7 bhp which they thought was very good in terms of being close to the standard 493 bhp. Apparently many cars don't make the power the manufacturers claim !!!
They fitted 2 x K&N air filters and the ECU remap, then did two 'after' power runs. They've had two other SL55 AMG's in there before and they made 551 and 542 respectively so that was what we were expecting.
However, we were all a bit surprised when it made.....
586.7bhp
This conveniently works out at 300 bhp/tonne.
l have to say that 'on the road' it doesn't feel massively different, but it was rush hour and l couldn't open it up so l'm keen to feel the difference on suitable roads. l think traction might be more of an issue. They couldn't measure the torque due to the auto gearbox and their dyno equipment, but they said it was 'awesome'.
Finally, l must say Paramount were excellent - very professional, accommodating, knowledgeable and passionate about cars & tuning.
A small issue cropped up and they dealt with it efficiently and promptly. lt's not often that l am impressed with any company but Paramount pleasantly surprised me today.
The 'before' run showed 490.7 bhp which they thought was very good in terms of being close to the standard 493 bhp. Apparently many cars don't make the power the manufacturers claim !!!
They fitted 2 x K&N air filters and the ECU remap, then did two 'after' power runs. They've had two other SL55 AMG's in there before and they made 551 and 542 respectively so that was what we were expecting.
However, we were all a bit surprised when it made.....
586.7bhp
This conveniently works out at 300 bhp/tonne.
l have to say that 'on the road' it doesn't feel massively different, but it was rush hour and l couldn't open it up so l'm keen to feel the difference on suitable roads. l think traction might be more of an issue. They couldn't measure the torque due to the auto gearbox and their dyno equipment, but they said it was 'awesome'.
Finally, l must say Paramount were excellent - very professional, accommodating, knowledgeable and passionate about cars & tuning.
A small issue cropped up and they dealt with it efficiently and promptly. lt's not often that l am impressed with any company but Paramount pleasantly surprised me today.
Edited by CycleSi on Wednesday 17th June 20:45
lnteresting - l shall see what they say in that case.
The only time l came close to giving it some stick it certainly went better than before but seeing as it was for only a very short time l didn't take too much notice.
Will be driving it to the British GP on Sunday so will 'test' it then?
The only time l came close to giving it some stick it certainly went better than before but seeing as it was for only a very short time l didn't take too much notice.
Will be driving it to the British GP on Sunday so will 'test' it then?
CycleSi said:
lnteresting - l shall see what they say in that case.
The only time l came close to giving it some stick it certainly went better than before but seeing as it was for only a very short time l didn't take too much notice.
Will be driving it to the British GP on Sunday so will 'test' it then?
Any update on the upgrade? The only time l came close to giving it some stick it certainly went better than before but seeing as it was for only a very short time l didn't take too much notice.
Will be driving it to the British GP on Sunday so will 'test' it then?
CycleSi said:
Went to Paramount Performance in Slough today. An interesting day to say the least.
The 'before' run showed 490.7 bhp which they thought was very good in terms of being close to the standard 493 bhp. Apparently many cars don't make the power the manufacturers claim !!!
They fitted 2 x K&N air filters and the ECU remap, then did two 'after' power runs. They've had two other SL55 AMG's in there before and they made 551 and 542 respectively so that was what we were expecting.
However, we were all a bit surprised when it made.....
586.7bhp
This conveniently works out at 300 bhp/tonne.
l have to say that 'on the road' it doesn't feel massively different, but it was rush hour and l couldn't open it up so l'm keen to feel the difference on suitable roads. l think traction might be more of an issue. They couldn't measure the torque due to the auto gearbox and their dyno equipment, but they said it was 'awesome'.
Finally, l must say Paramount were excellent - very professional, accommodating, knowledgeable and passionate about cars & tuning.
A small issue cropped up and they dealt with it efficiently and promptly. lt's not often that l am impressed with any company but Paramount pleasantly surprised me today.
I can't understand why paramount don't give the torque #s... went there on a porsche rolling road and they plotted power against speed on the x-axis as opposed to rpm, and no afr's or torque figs. Poor show I thought, but interested to know if they've provided these figs for anyone else ? The 'before' run showed 490.7 bhp which they thought was very good in terms of being close to the standard 493 bhp. Apparently many cars don't make the power the manufacturers claim !!!
They fitted 2 x K&N air filters and the ECU remap, then did two 'after' power runs. They've had two other SL55 AMG's in there before and they made 551 and 542 respectively so that was what we were expecting.
However, we were all a bit surprised when it made.....
586.7bhp
This conveniently works out at 300 bhp/tonne.
l have to say that 'on the road' it doesn't feel massively different, but it was rush hour and l couldn't open it up so l'm keen to feel the difference on suitable roads. l think traction might be more of an issue. They couldn't measure the torque due to the auto gearbox and their dyno equipment, but they said it was 'awesome'.
Finally, l must say Paramount were excellent - very professional, accommodating, knowledgeable and passionate about cars & tuning.
A small issue cropped up and they dealt with it efficiently and promptly. lt's not often that l am impressed with any company but Paramount pleasantly surprised me today.
Edited by CycleSi on Wednesday 17th June 20:45
CycleSi said:
The 'before' run showed 490.7 bhp which they thought was very good in terms of being close to the standard 493 bhp. Apparently many cars don't make the power the manufacturers claim !!!
They fitted 2 x K&N air filters and the ECU remap, then did two 'after' power runs. They've had two other SL55 AMG's in there before and they made 551 and 542 respectively so that was what we were expecting.
However, we were all a bit surprised when it made.....
586.7bhp
]
First AMG got into trouble in German because their engines "made" the power and some, they were caught understating the powerThey fitted 2 x K&N air filters and the ECU remap, then did two 'after' power runs. They've had two other SL55 AMG's in there before and they made 551 and 542 respectively so that was what we were expecting.
However, we were all a bit surprised when it made.....
586.7bhp
]
Unless you have had the engine out this was done on the rollers, so they are guessing the transmission loss. I have had this done and simply couldn't tell in the real world
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.
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.
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.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.
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.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.
l didn't ask for a 'before' printout, but l saw it on the screen and also videoed it. They did two 'before' runs and both showed an almost identical 490.3 and 490.7 bhp.
l have got the 'after' printout though so if l can get someone to show me how to do it l'll post it up for you to see. Bear with me as l'm off to the Nurburgring on Friday and it might have to wait until l get back.
l have got the 'after' printout though so if l can get someone to show me how to do it l'll post it up for you to see. Bear with me as l'm off to the Nurburgring on Friday and it might have to wait until l get back.
Aren't we all - there's no such thing as too much power!
Anyway, off topic a bit but still to do with SL55s. Has anyone taken off the rear `resonators` like the chaps in the states seem to do?
Looks to be a very common and simple mod which would free up a bit more rumble but i'm wondering if anyone over here has done it as I'm a bit reluctant to take an American's p.o.v. alone on it.
Cheers,
Chris
Anyway, off topic a bit but still to do with SL55s. Has anyone taken off the rear `resonators` like the chaps in the states seem to do?
Looks to be a very common and simple mod which would free up a bit more rumble but i'm wondering if anyone over here has done it as I'm a bit reluctant to take an American's p.o.v. alone on it.
Cheers,
Chris
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.
Gassing Station | Mercedes | Top of Page | What's New | My Stuff