Crown

Board: AMG Mercedes Language: English Region: Worldwide Share/Save/Bookmark Close

Forum - Thread

    Apr 21, 2004 4:27:20 PM

    TB993tt
    Rennteam Pro
    TB993tt
    Loc: manchester , United Kingdom
    Posts: 2278, Gallery
    Registered on: Jul 22, 2002

    more power for the supercharged V8

    Just purchased an '04 E55T. I have read elsewhere that the stock ECU makes it run very rich. In an attempt to improve the quite unbelievable fuel consumption and maybe liberate a few extra horses can anyone point me in the direction of the best ECU tuner. I am a little concerned about mods voiding the warranty and would be intersested in opinions from people who have modded these engines.
    TIA

    Apr 21, 2004 9:19:47 PM

    RCA
    Rennteam Administrator
    RC
    Loc: Rennteam HQ , Germany
    Posts: 59423, Gallery
    Registered on: Mar 26, 2002
    Reply to: TB993tt

    Re: more power for the supercharged V8

    Quote:
    TB993tt said:
    Just purchased an '04 E55T. I have read elsewhere that the stock ECU makes it run very rich. In an attempt to improve the quite unbelievable fuel consumption and maybe liberate a few extra horses can anyone point me in the direction of the best ECU tuner. I am a little concerned about mods voiding the warranty and would be intersested in opinions from people who have modded these engines.
    TIA



    I know you won't like it but without a different pulley, a ECU mod would be useless, maybe even bad for the engine and you wouldn't get a satisfactory power increase.
    Let me give you a hint: german car magazines tested a Vaeth with I think 580 HP and another tuned E55 (don't remember the Tuner) with 530 HP. Both cars were as fast or even slowlier than the standard E55.
    If you tune your E55 to let's say 530-540 HP with a different pulley, a different ECU software and probably a different exhaust with high flow cats, the real advantage is in the upper 200 kph range. Expect a very low or even non-existant performance gain from 0-125 mph and a substantial increase in the upper 140 mph range. Is it really worth it voiding your warranty? I don't know. I had so much trouble with my E55 lately, I was happy I didn't touch the engine. Got rid of it and went for a Cayenne Turbo instead.
    I hope you have more luck with you car than I did.
    Better put your money into the limited slip differential which is a MUST have option on the E55. Available only for install directly at AMG in Affalterbach but I heard of somebody from the US who went there and bought the parts and go them installed in the US.

    Apr 21, 2004 9:19:47 PM

    RCA
    Rennteam Administrator
    RC
    Loc: Rennteam HQ , Germany
    Posts: 59423, Gallery
    Registered on: Mar 26, 2002
    Reply to: TB993tt

    Re: more power for the supercharged V8

    Quote:
    TB993tt said:
    Just purchased an '04 E55T. I have read elsewhere that the stock ECU makes it run very rich. In an attempt to improve the quite unbelievable fuel consumption and maybe liberate a few extra horses can anyone point me in the direction of the best ECU tuner. I am a little concerned about mods voiding the warranty and would be intersested in opinions from people who have modded these engines.
    TIA



    I know you won't like it but without a different pulley, a ECU mod would be useless, maybe even bad for the engine and you wouldn't get a satisfactory power increase.
    Let me give you a hint: german car magazines tested a Vaeth with I think 580 HP and another tuned E55 (don't remember the Tuner) with 530 HP. Both cars were as fast or even slowlier than the standard E55.
    If you tune your E55 to let's say 530-540 HP with a different pulley, a different ECU software and probably a different exhaust with high flow cats, the real advantage is in the upper 200 kph range. Expect a very low or even non-existant performance gain from 0-125 mph and a substantial increase in the upper 140 mph range. Is it really worth it voiding your warranty? I don't know. I had so much trouble with my E55 lately, I was happy I didn't touch the engine. Got rid of it and went for a Cayenne Turbo instead.
    I hope you have more luck with you car than I did.
    Better put your money into the limited slip differential which is a MUST have option on the E55. Available only for install directly at AMG in Affalterbach but I heard of somebody from the US who went there and bought the parts and go them installed in the US.

    Apr 22, 2004 5:49:24 PM

    TB993tt
    Rennteam Pro
    TB993tt
    Loc: manchester , United Kingdom
    Posts: 2278, Gallery
    Registered on: Jul 22, 2002
    Reply to: RCA

    Re: more power for the supercharged V8

    RC
    I appreciate your reply I saw that Vath test -I think it was the 5.8K engine rated at 620hp and you are correct, the figures it gave were barely better than stock. There is a firm in the UK who retune the ECU -they say it is undetectable by the dealer and only Bosch could tell it had been tampered with -My plan is to do the upgrade, and if there are any major problems, to get them to re-flash the old program. They claim 540hp which I don't believe, but they also say it brings the torque on much earlier since the stock program allows the wastegates to bleed the boost initially. Incidentally, it was your reporting (RC) of your E55 which encouraged me to buy one over an RS6 -I just hope mine has the glitches sorted out !

    Apr 22, 2004 5:49:24 PM

    TB993tt
    Rennteam Pro
    TB993tt
    Loc: manchester , United Kingdom
    Posts: 2278, Gallery
    Registered on: Jul 22, 2002
    Reply to: RCA

    Re: more power for the supercharged V8

    RC
    I appreciate your reply I saw that Vath test -I think it was the 5.8K engine rated at 620hp and you are correct, the figures it gave were barely better than stock. There is a firm in the UK who retune the ECU -they say it is undetectable by the dealer and only Bosch could tell it had been tampered with -My plan is to do the upgrade, and if there are any major problems, to get them to re-flash the old program. They claim 540hp which I don't believe, but they also say it brings the torque on much earlier since the stock program allows the wastegates to bleed the boost initially. Incidentally, it was your reporting (RC) of your E55 which encouraged me to buy one over an RS6 -I just hope mine has the glitches sorted out !

    Apr 22, 2004 7:04:59 PM

    RCA
    Rennteam Administrator
    RC
    Loc: Rennteam HQ , Germany
    Posts: 59423, Gallery
    Registered on: Mar 26, 2002
    Reply to: TB993tt

    Re: more power for the supercharged V8

    Quote:
    TB993tt said:
    There is a firm in the UK who retune the ECU -they say it is undetectable by the dealer and only Bosch could tell it had been tampered with -My plan is to do the upgrade, and if there are any major problems, to get them to re-flash the old program. They claim 540hp which I don't believe, but they also say it brings the torque on much earlier since the stock program allows the wastegates to bleed the boost initially. Incidentally, it was your reporting (RC) of your E55 which encouraged me to buy one over an RS6 -I just hope mine has the glitches sorted out !



    The E55 is a fine car, especially if you add the limited slip differential to it. Honestly, the LSD really adds a lot of fun to this car.
    The problems I had are a different story. I'll post a little report as soon as I have more time.

    Regarding ECU upgrades: if a Tuner claims a software change is undetectable or only detectable by Bosch, he is a LIAR.
    Your dealer might not be able to detect a software change but Mercedes can. In case of a broken engine or any other serious problems, they usually ask the dealer to make a printout of the black box data or they're even able to get diagnostic data online from the dealer directly, depending on the dealer and country. Result: any software change can be detected!
    If you plan to "fool" them by rewriting the original software to the black box, this doesn't work either. The ECU black box saves all software installs and other (not so well documented) data in a non-erasable ROM. This is also the place where maximum boost pressures, etc. are saved, including how many km/mls the engine has, how many hours(!) it has run, etc.
    Now this data is also saved in the speedo cluster and/or other black boxes.

    Or to make it short: a software change IS detectable and in case of serious problems which require the warranty, Mercedes will surely check the software too.

    And a last thing: 540 HP without changing the pulley is impossible. Expect something around 20 HP with a ECU upgrade only...if you're lucky. Unless the software is so aggressive that you get more HP of course but it won't be healthy for your engine.

    Don't do it, you don't gain too much performance and you can end up having a lot of trouble.

    Apr 22, 2004 7:04:59 PM

    RCA
    Rennteam Administrator
    RC
    Loc: Rennteam HQ , Germany
    Posts: 59423, Gallery
    Registered on: Mar 26, 2002
    Reply to: TB993tt

    Re: more power for the supercharged V8

    Quote:
    TB993tt said:
    There is a firm in the UK who retune the ECU -they say it is undetectable by the dealer and only Bosch could tell it had been tampered with -My plan is to do the upgrade, and if there are any major problems, to get them to re-flash the old program. They claim 540hp which I don't believe, but they also say it brings the torque on much earlier since the stock program allows the wastegates to bleed the boost initially. Incidentally, it was your reporting (RC) of your E55 which encouraged me to buy one over an RS6 -I just hope mine has the glitches sorted out !



    The E55 is a fine car, especially if you add the limited slip differential to it. Honestly, the LSD really adds a lot of fun to this car.
    The problems I had are a different story. I'll post a little report as soon as I have more time.

    Regarding ECU upgrades: if a Tuner claims a software change is undetectable or only detectable by Bosch, he is a LIAR.
    Your dealer might not be able to detect a software change but Mercedes can. In case of a broken engine or any other serious problems, they usually ask the dealer to make a printout of the black box data or they're even able to get diagnostic data online from the dealer directly, depending on the dealer and country. Result: any software change can be detected!
    If you plan to "fool" them by rewriting the original software to the black box, this doesn't work either. The ECU black box saves all software installs and other (not so well documented) data in a non-erasable ROM. This is also the place where maximum boost pressures, etc. are saved, including how many km/mls the engine has, how many hours(!) it has run, etc.
    Now this data is also saved in the speedo cluster and/or other black boxes.

    Or to make it short: a software change IS detectable and in case of serious problems which require the warranty, Mercedes will surely check the software too.

    And a last thing: 540 HP without changing the pulley is impossible. Expect something around 20 HP with a ECU upgrade only...if you're lucky. Unless the software is so aggressive that you get more HP of course but it won't be healthy for your engine.

    Don't do it, you don't gain too much performance and you can end up having a lot of trouble.
     
    Edit

    Forum

    1. All 

    Boards

     
    Board Subject Last post Rating Views Replies
    Porsche Sticky SUN'S LAST RUN TO WILSON, WY - 991 C2S CAB LIFE, END OF AN ERA (Part II) 12/8/23 11:25 PM
    GnilM     		301742 1704
    Porsche Sticky Welcome to Rennteam: Cars and Coffee... (photos) 11/18/23 11:46 AM
    Boxster Coupe GTS     		267587 551
    Porsche Sticky OFFICIAL: Cayman GT4 RS (2021) 5/12/23 12:11 PM
    W8MM     		194177 288
    Porsche Sticky OFFICIAL: Porsche 911 (992) GT3 RS - 2022 12/6/23 11:50 AM
    Porker     		118089 256
    Porsche The moment I've been waiting for... 11/29/23 8:30 PM
    Pilot
     
     
     
     
     
    		 754027 1361
    Porsche 992 GT3 7/23/23 7:01 PM
    Grant     		560458 3868
    Porsche OFFICIAL: 911 R (2016) 12/25/22 1:02 AM
    CGX car nut     		553678 2663
    Porsche OFFICIAL: New Porsche 911 Turbo S (2020) 4/6/23 7:43 AM
    crayphile     		382909 1276
    Porsche Welcome to the new Taycan Forum! 11/3/23 1:06 PM
    Wonderbar     		298764 1495
    Porsche Donor vehicle for Singer Vehicle Design 7/3/23 12:30 PM
    Porker     		291481 797
    Others Tesla 2 the new thread 12/10/23 2:12 PM
    Boxster Coupe GTS     		240013 2390
    Porsche GT4RS 12/1/23 8:15 AM
    GnilM     		227714 1361
    Lambo Aventador and SV 3/30/23 1:59 PM
    CGX car nut     		226805 724
    Ferrari Ferrari 812 Superfast 4/21/23 8:09 AM
    the-missile     		182591 550
    Porsche Red Nipples 991.2 GT3 Touring on tour 12/6/23 10:31 PM
    Enmanuel     		172672 620
    Others Corvette C8 10/16/23 3:24 PM
    Enmanuel     		162866 488
    Motor Sp. [2022] Formula 1 2/4/23 1:10 AM
    WhoopsyM     		158338 1576
    Porsche Collected my 997 GTS today 10/19/23 7:06 PM
    CGX car nut
     
     
     
     
     
    		 152916 812
    Lambo Huracán EVO STO 7/30/23 6:59 PM
    mcdelaug     		128844 346
    Others Gordon Murray - T.50 11/22/23 10:27 AM
    mcdelaug     		53986 387
    Others Valkyrie final design? 4/28/23 2:45 AM
    Rossi     		43407 219
    AMG Bought a muscle car... 3/26/23 3:31 PM
    WhoopsyM     		34738 303
    Porsche 992 Sport Classic 2/13/23 5:35 PM
    RCA     		28905 213
    Lotus Lotus Emira 6/25/23 2:53 PM
    Enmanuel     		27326 101
    Porsche Back to basics - 996 GT3 RS 6/11/23 5:13 PM
    CGX car nut     		26387 144
    Motor Sp. 2023 Formula One 12/6/23 7:22 PM
    964C2     		26206 684
    Ferrari [2022] Ferrari Purosangue (SUV) 4/15/23 5:20 AM
    watt     		24576 141
    AMG Mercedes-Benz W124 500E aka Porsche typ 2758 11/21/23 2:47 PM
    the-missile     		23072 272
    Porsche 2022 992 Safari Model 12/9/23 11:35 PM
    CGX car nut     		19863 185
    BMW M 2024 BMW M3 CS Official Now 8/30/23 6:51 PM
    art.italy     		15543 297
    139 items found, displaying 1 to 30.