Piecha Exhaust Sound Clip

noregret4life · 09-07-2006

I know everyone has been curious about the Piecha Quad exhaust system for the SLK350 and 200.

I have been in contact with Marcus Piecha over the last week, and was able to get a video clip of the exhaust in action. Though in my opinion this is not the best clip, i have communicated to him some potential improvements on how to record the clip better.

Yes you heard it here first!

The Piecha SLK350 Quad Exhaust:
http://www.savefile.com/files/41823

Once i get more clips i will post them as they come in.

The SLK200 clip should be ready soon as well. So stay tuned and please post your feedback on this initial clip.

ierax · 09-07-2006

Thank you,thta was very thoughtful

.... Nowadays customers have to convince manufacturers on how to advertise their goods......

*easty* · 09-07-2006

That does sound very nice. Sounds a little race garbled. You may want to get the ECU remapped to get the engine running on par with it.

noregret4life · 09-07-2006

I like it as well.
Easty, how would they remap the 350 ECU? (Sorry for the lack of knowledge here) Or better what would they remap it to? Is the garble bad?

Got an email for Piecha. He said that they will make the new videos based on my suggestions.

1. Idle
2. Rev (random)
3. Rev Steady Curve (1000-4000+RPM)

Also perhaps a driveby, and fast start 0-60.

Will keep u posted

*easty* · 09-07-2006

I'm not 100% on this stuff just the info from when I used to set up bikes. The map contains the data for the Air/fuel ratio at different rev ranges. The car is set-up initially for the best performance obviously within certain regulations for Fuel efficiency and emissions controls. If you change anything on the vehicle that effects in how the engine works it really worth considering getting the ECU re-mapped for best performance. I'm sure Dan will be able to explain more and if it's possible and how easy it is.

On the bike I simply had a black box that plugged inline between the ECU and the injectors. I could plug this into a PC and upload various maps. With sports bikes most performance exhaust companies create specific maps and put them on the net for their customers. But on most modern fuel injected bikes it's really worth remapping even if you keep the bike stock as you can achive a little hp plus the power curve can be a lot smother which is very import on a bike.

N4PWJ · 09-08-2006

i have also been in touch with piecha about these exhausts. They claimed 15ps (i assume that is even to 15bhp) performance gains. Should I consider a remap once exhaust is fitted? will this affect fuel consumption/mpg?
I personally think the exhausts look fantastic and am sure they will sound excellent to. However I could spend more (nearly double) and get a full carlsson exhaust system which has better performance gains but only slightly.
oh and piecha sounds great in video!!!!

DansSlk · 09-08-2006

N4PWJ 15PS - 14BHP I think that figure might be a little optimistic myself unless the whole exhaust system is replaced but i am sure some gains are to be made from the system

I have answered your Q about the mpg in the post about the ECU since i thought it makes more sense to do it as a single post

DansSlk · 09-08-2006

noregret,

As easty says a repair is basically changing the A/F ratio for certain RPM ranges now in a car is becomes a little complex because the ECU will have various different maps and those maps will have more than one parameter for each entry in the map the reason for this is for fuel efficiency most of the time but performance maps are also included for when you are ragging the car.

The two maps you will have experienced for sure are the after start and smooth running entires the after start map is designed to get the cats up to temp fast so it will hold the RPM's at a higher rate than the smooth running map it also bases its information less on what the O2 sensors are reporting its primary sensors are the MAF for the volume of incoming air, the oil temp sensor for releasing the map to normal operation and to protect the engine and transmission from over-revving when they are cold and the intake air temp sensor used for working out a starting temperature during this stage the engine is running open-loop used values stored in the ECU and not what the O2 sensors are reporting back.

The smooth running map will be running in a closed-loop mode so it will be using the values reported by the O2 sensors to meter the A/F mixture it will also be using all of the engine and transmission sensors to help meter the mixture this basically means that there are almost limitless possibilities for each RPM segment however the system will have upper and lower limit values that it must adhere to based on what the major sensors are reporting back that way it cannot flood the cylinders with fuel or just fill them with air there will always be a good enough mix to allow for combustion.

The black box easty was talking about is placed on cars between the sensors and the ECU so the computer cannot detect its presence but the most common way of re-mapping an ECU is to reprogram it using a software program a good tuner will have an SDS machine that can download the map from the computer he will then offload it from the DAS into a program designed to do the actual remapping once that is done he will reload it into the DAS and that will then upload it to the ECU this is the exact same way we use when we are updating the software versions when a car come in for a service except the tuner will tweak the values a little.

The limit in your car and every other NA car around is going to be the amount of air it has to breathe on now your new exhaust should be more free flowing than the OEM this should allow for the exhaust gases to escape faster and that means you can allow for a more fuel rich mixture some tuners will simply add fuel to the whole range but this is a pointless exercise since it does not matter how much fuel you add if you ain't got the correct amount of air to mix with it this can actually reduce performance this is why it pays to go to a good one they will allow for more ECU adaption and let the onboard brains do the work, the ECU can adapt to your driving style and to the operating condition of the engine very effectively in these cars so an actual remap where the fuel is altered is not really needed because the computer will sense the changes that will occur after the exhaust is fitted and adapt accordingly but the chances are it will reach a limit value and that is when a tuner comes in because they can re-map the ECU will wider limits allowing it to more fully compensate for the efficiency increase the effect that happens when the limits are reached can be found in my thread about the new fuel my car is running.

Mapping a car this way will also see less of an impact on the mpg since when you are at idle the computer will lean it off and at full throttle she will run rich so the chances are you wont really notice any difference in mpg that is worth mentioning also if you run your car on one type of fuel you can get the ECU told that that is the base value this will improve performance again as the car does not have to be able to compensate for lower quality fuels and this can actually improve your fuel economy.

I hope this explains things and any other questions just ask

Dan

noregret4life · 09-08-2006

Thank you both for all the info I hope little by little i'll be able to gather enough knowledge on the subjects. Or at least up to par of my electrical counterpart.

If i do opt for the Piecha exhaust, i am hoping to put in new "sport" air filters such as discussed by other members. Strange though that the 350 has so few options for intake filters. You AMG guys get all goods!!- Just joking

DansSlk · 09-08-2006

Quote:

Originally Posted by noregret4life

Thank you both for all the info I hope little by little i'll be able to gather enough knowledge on the subjects. Or at least up to par of my electrical counterpart.

If i do opt for the Piecha exhaust, i am hoping to put in new "sport" air filters such as discussed by other members. Strange though that the 350 has so few options for intake filters. You AMG guys get all goods!!- Just joking

No worries about the info mate.

Just a quick question kinda un related so it will make it quick has anybody actually measured the internal diameters of the 350 airbox if memory serves me correct it should be the same as the 55's

noregret4life · 09-08-2006

Quote:

Originally Posted by DansSlk

No worries about the info mate.

Just a quick question kinda un related so it will make it quick has anybody actually measured the internal diameters of the 350 airbox if memory serves me correct it should be the same as the 55's

I have not actually sized it up, or heard of anyone that has. Weather permitting i may climb under and get a rough estimate this weekend.

The straight pipe idea is still floating around in my head... I'm not yet sold on the Piecha or other exhaust. With a straight pipe, (granted sound levels are acceptable) you can really make it look like anything you want at the tips. I'm imagining Quad Black Chrome tips with Silver Chrome trim line just at the edge

DansSlk · 09-08-2006

It just pulls off so i would imagine it will take you all of 30 seconds to remove it.

That exhaust idea actually sounds kinda cool i gotta be honest with you mate.

noregret4life · 09-08-2006

Quote:

Originally Posted by DansSlk

It just pulls off so i would imagine it will take you all of 30 seconds to remove it.

That exhaust idea actually sounds kinda cool i gotta be honest with you mate.

Hey Dan, What do you mean by "It just pulls off"

**etyu** · 09-08-2006

Here's a link to a thread by jbanks15 on removing the air filter:
http://www.slkworld.com/slk-r171-gen...emoving+filter

Same procedure for the 280. Hmmm.. I'll have to get the dimensions for the 280 air filter and see if the ones for the 350 would fit. I imagine so. I'll check this weekend.

DansSlk · 09-08-2006

Quote:

Originally Posted by noregret4life

Hey Dan, What do you mean by "It just pulls off"

The link etyu posted to jbanks15's instructions is correct

Just grab hold of the front edge of the airbox and pull up the box should sort of split in the middle once that it removed disconnect the hose then simply unfasten the latch and pull the box up from each corner it is held on by rubber feet hence my comment it just pulls off you literally grab the thing and pull.

Best do it on a cold engine so as not to toast your hands and also it allows the box to slide off the rubber easier

Wallance · 09-15-2006

Hi noregret4life, I have been thinking of removing the resonator on my slk350 to make some louder sound on my car too! but I am still held back because I am scare that it will be too loud, warranty issues with MB or too much performance lost cause there will be less back pressure?
So yea... just wondering have anyone really done that yet and have sound clips of it?
Also refering back to what you posted before,
http://www.flowmastermufflers.com/pr...ex&cPath=1_163
I wonder what exactly this resonator does? Is it better than if I get a stainless steel pipe and weld it on after removing the resonator?
Can someone with experience or technical knwoledge answer my questions?
Thanks alot!

Quote:

Originally Posted by noregret4life

I have not actually sized it up, or heard of anyone that has. Weather permitting i may climb under and get a rough estimate this weekend.

The straight pipe idea is still floating around in my head... I'm not yet sold on the Piecha or other exhaust. With a straight pipe, (granted sound levels are acceptable) you can really make it look like anything you want at the tips. I'm imagining Quad Black Chrome tips with Silver Chrome trim line just at the edge

bejak · 09-15-2006

The SLK350 sound was good, but what about us with the small 1.8 litre 200?
Can it be possible to get some "race"-sound? Perhaps in combination with a sport air filter.
Hoping for some sound clips soon.

Bengt

09-07-2006	#1 (permalink)
noregret4life Elite SLK World Member Join Date: Jun 2006 Location: NJ Vehicle: '05 SLK350 Posts: 1,092 Country: Thanks: 1 Thanked 17 Times in 11 Posts	Piecha Exhaust Sound Clip I know everyone has been curious about the Piecha Quad exhaust system for the SLK350 and 200. I have been in contact with Marcus Piecha over the last week, and was able to get a video clip of the exhaust in action. Though in my opinion this is not the best clip, i have communicated to him some potential improvements on how to record the clip better. Yes you heard it here first! The Piecha SLK350 Quad Exhaust: http://www.savefile.com/files/41823 Once i get more clips i will post them as they come in. The SLK200 clip should be ready soon as well. So stay tuned and please post your feedback on this initial clip.

09-07-2006	#3 (permalink)
easty Moderator Join Date: Jun 2006 Location: Montreal Vehicle: ///AMG Posts: 2,075 Country: Thanks: 17 Thanked 19 Times in 9 Posts	That does sound very nice. Sounds a little race garbled. You may want to get the ECU remapped to get the engine running on par with it. __________________ "I'm not a roman mum, I'm a kike, a yid, a heebie, a hook-nose, I'm kosher mum, I'm a Red Sea pedestrian, and proud of it!" Life of Brian To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

09-07-2006	#5 (permalink)
easty Moderator Join Date: Jun 2006 Location: Montreal Vehicle: ///AMG Posts: 2,075 Country: Thanks: 17 Thanked 19 Times in 9 Posts	I'm not 100% on this stuff just the info from when I used to set up bikes. The map contains the data for the Air/fuel ratio at different rev ranges. The car is set-up initially for the best performance obviously within certain regulations for Fuel efficiency and emissions controls. If you change anything on the vehicle that effects in how the engine works it really worth considering getting the ECU re-mapped for best performance. I'm sure Dan will be able to explain more and if it's possible and how easy it is. On the bike I simply had a black box that plugged inline between the ECU and the injectors. I could plug this into a PC and upload various maps. With sports bikes most performance exhaust companies create specific maps and put them on the net for their customers. But on most modern fuel injected bikes it's really worth remapping even if you keep the bike stock as you can achive a little hp plus the power curve can be a lot smother which is very import on a bike. __________________ "I'm not a roman mum, I'm a kike, a yid, a heebie, a hook-nose, I'm kosher mum, I'm a Red Sea pedestrian, and proud of it!" Life of Brian To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. Last edited by easty; 09-07-2006 at 06:03 PM.

09-08-2006	#7 (permalink)
DansSlk Dude Join Date: Jun 2006 Location: Wales Vehicle: 05 B55S (Brabus 6.1 S) Posts: 6,756 Country: Thanks: 96 Thanked 221 Times in 173 Posts	N4PWJ 15PS - 14BHP I think that figure might be a little optimistic myself unless the whole exhaust system is replaced but i am sure some gains are to be made from the system I have answered your Q about the mpg in the post about the ECU since i thought it makes more sense to do it as a single post __________________ One thing you will learn with German cars - If it's simple it ain't happening.

09-08-2006	#8 (permalink)
DansSlk Dude Join Date: Jun 2006 Location: Wales Vehicle: 05 B55S (Brabus 6.1 S) Posts: 6,756 Country: Thanks: 96 Thanked 221 Times in 173 Posts	noregret, As easty says a repair is basically changing the A/F ratio for certain RPM ranges now in a car is becomes a little complex because the ECU will have various different maps and those maps will have more than one parameter for each entry in the map the reason for this is for fuel efficiency most of the time but performance maps are also included for when you are ragging the car. The two maps you will have experienced for sure are the after start and smooth running entires the after start map is designed to get the cats up to temp fast so it will hold the RPM's at a higher rate than the smooth running map it also bases its information less on what the O2 sensors are reporting its primary sensors are the MAF for the volume of incoming air, the oil temp sensor for releasing the map to normal operation and to protect the engine and transmission from over-revving when they are cold and the intake air temp sensor used for working out a starting temperature during this stage the engine is running open-loop used values stored in the ECU and not what the O2 sensors are reporting back. The smooth running map will be running in a closed-loop mode so it will be using the values reported by the O2 sensors to meter the A/F mixture it will also be using all of the engine and transmission sensors to help meter the mixture this basically means that there are almost limitless possibilities for each RPM segment however the system will have upper and lower limit values that it must adhere to based on what the major sensors are reporting back that way it cannot flood the cylinders with fuel or just fill them with air there will always be a good enough mix to allow for combustion. The black box easty was talking about is placed on cars between the sensors and the ECU so the computer cannot detect its presence but the most common way of re-mapping an ECU is to reprogram it using a software program a good tuner will have an SDS machine that can download the map from the computer he will then offload it from the DAS into a program designed to do the actual remapping once that is done he will reload it into the DAS and that will then upload it to the ECU this is the exact same way we use when we are updating the software versions when a car come in for a service except the tuner will tweak the values a little. The limit in your car and every other NA car around is going to be the amount of air it has to breathe on now your new exhaust should be more free flowing than the OEM this should allow for the exhaust gases to escape faster and that means you can allow for a more fuel rich mixture some tuners will simply add fuel to the whole range but this is a pointless exercise since it does not matter how much fuel you add if you ain't got the correct amount of air to mix with it this can actually reduce performance this is why it pays to go to a good one they will allow for more ECU adaption and let the onboard brains do the work, the ECU can adapt to your driving style and to the operating condition of the engine very effectively in these cars so an actual remap where the fuel is altered is not really needed because the computer will sense the changes that will occur after the exhaust is fitted and adapt accordingly but the chances are it will reach a limit value and that is when a tuner comes in because they can re-map the ECU will wider limits allowing it to more fully compensate for the efficiency increase the effect that happens when the limits are reached can be found in my thread about the new fuel my car is running. Mapping a car this way will also see less of an impact on the mpg since when you are at idle the computer will lean it off and at full throttle she will run rich so the chances are you wont really notice any difference in mpg that is worth mentioning also if you run your car on one type of fuel you can get the ECU told that that is the base value this will improve performance again as the car does not have to be able to compensate for lower quality fuels and this can actually improve your fuel economy. I hope this explains things and any other questions just ask Dan __________________ One thing you will learn with German cars - If it's simple it ain't happening.

09-07-2006	#2 (permalink)
ierax Elite SLK World Member Join Date: Jun 2006 Vehicle: Obsidian black SLK Posts: 293 Country: Thanks: 1 Thanked 0 Times in 0 Posts	Thank you,thta was very thoughtful .... Nowadays customers have to convince manufacturers on how to advertise their goods......

09-07-2006	#4 (permalink)
noregret4life Elite SLK World Member Join Date: Jun 2006 Location: NJ Vehicle: '05 SLK350 Posts: 1,092 Country: Thanks: 1 Thanked 17 Times in 11 Posts	I like it as well. Easty, how would they remap the 350 ECU? (Sorry for the lack of knowledge here) Or better what would they remap it to? Is the garble bad? Got an email for Piecha. He said that they will make the new videos based on my suggestions. 1. Idle 2. Rev (random) 3. Rev Steady Curve (1000-4000+RPM) Also perhaps a driveby, and fast start 0-60. Will keep u posted

09-08-2006	#6 (permalink)
N4PWJ Elite SLK World Member Join Date: Aug 2006 Location: Belfast,N.Ireland Vehicle: 2006,slk280,carlsson Other Toys: Caterham Posts: 1,417 Country: Thanks: 1 Thanked 4 Times in 4 Posts	i have also been in touch with piecha about these exhausts. They claimed 15ps (i assume that is even to 15bhp) performance gains. Should I consider a remap once exhaust is fitted? will this affect fuel consumption/mpg? I personally think the exhausts look fantastic and am sure they will sound excellent to. However I could spend more (nearly double) and get a full carlsson exhaust system which has better performance gains but only slightly. oh and piecha sounds great in video!!!!

09-08-2006	#9 (permalink)
noregret4life Elite SLK World Member Join Date: Jun 2006 Location: NJ Vehicle: '05 SLK350 Posts: 1,092 Country: Thanks: 1 Thanked 17 Times in 11 Posts	Thank you both for all the info I hope little by little i'll be able to gather enough knowledge on the subjects. Or at least up to par of my electrical counterpart. If i do opt for the Piecha exhaust, i am hoping to put in new "sport" air filters such as discussed by other members. Strange though that the 350 has so few options for intake filters. You AMG guys get all goods!!- Just joking

09-08-2006	#12 (permalink)
DansSlk Dude Join Date: Jun 2006 Location: Wales Vehicle: 05 B55S (Brabus 6.1 S) Posts: 6,756 Country: Thanks: 96 Thanked 221 Times in 173 Posts	It just pulls off so i would imagine it will take you all of 30 seconds to remove it. That exhaust idea actually sounds kinda cool i gotta be honest with you mate. __________________ One thing you will learn with German cars - If it's simple it ain't happening.

09-08-2006	#14 (permalink)
etyu Founding Member #2 / Ambassador Of Good Will Join Date: Jun 2006 Location: Orange County, CA Vehicle: 2008 SLK 55 Posts: 5,281 Country: Thanks: 377 Thanked 277 Times in 168 Posts	Here's a link to a thread by jbanks15 on removing the air filter: http://www.slkworld.com/slk-r171-gen...emoving+filter Same procedure for the 280. Hmmm.. I'll have to get the dimensions for the 280 air filter and see if the ones for the 350 would fit. I imagine so. I'll check this weekend. __________________ *Eddy* To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. Pewter/Beige, PIII package, Airscarf, Hands-Free Communication System, Lighting package Designo Black Leather Cover on e-brake handle, ( To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. Bill T), SmartTop v1.0, Kleyman 3BFM (NoRegret Custom), Green Air Filters, *Mod. R170 ant.*, EuroClear sidemarkers w/PIAA PlasmaIon lamps, chromed front & rear turn indicator lamps, PIAA SuperPlasmaGTX front parking lamps, bilateral rear fog lamps enabled.

09-15-2006	#17 (permalink)
bejak Founding Member Join Date: Jun 2006 Location: Sweden, West Coast Vehicle: 2004 SLK200K R171, aut, Iridium Posts: 145 Country: Thanks: 0 Thanked 0 Times in 0 Posts	The SLK350 sound was good, but what about us with the small 1.8 litre 200? Can it be possible to get some "race"-sound? Perhaps in combination with a sport air filter. Hoping for some sound clips soon. Bengt

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