TCU upgrade for C55
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2006 Weistec 3.0L SC'd C55, 2006 MaxPsi PT6466 Turbo'd M3, 2019 Maserati GTS , 2020Alfa Quadrifoglio
TCU upgrade for C55
I am contemplating either the Powerchip ECU or Evotech ECU/TCU combination. Powerchip will custom tune my car on a dyno as will Evotech but the difference is $800 for the TCU upgrade.
Can some tuning expert explain what a TCU upgrade will do for a C55 and why it would be necessary?
I know that my car shifts too early (upshifts from 4th to 5th before Max torque is reached or downshifts from 4th to 3rd causing a torque spike) but I don't know if the ECU or the TCU will address these issues.
I heard that the TCU upgrade simply removes the limiter that protects the tranny from too much stress if the car has too much power.
My current SpeedInnovation's custom ECU upgrade included changes to the shift points (higher rev limiter) but does the TCU do even more in terms of unleashing more power?
Can some tuning expert explain what a TCU upgrade will do for a C55 and why it would be necessary?
I know that my car shifts too early (upshifts from 4th to 5th before Max torque is reached or downshifts from 4th to 3rd causing a torque spike) but I don't know if the ECU or the TCU will address these issues.
I heard that the TCU upgrade simply removes the limiter that protects the tranny from too much stress if the car has too much power.
My current SpeedInnovation's custom ECU upgrade included changes to the shift points (higher rev limiter) but does the TCU do even more in terms of unleashing more power?
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I am contemplating either the Powerchip ECU or Evotech ECU/TCU combination. Powerchip will custom tune my car on a dyno as will Evotech but the difference is $800 for the TCU upgrade.
Can some tuning expert explain what a TCU upgrade will do for a C55 and why it would be necessary?
I know that my car shifts too early (upshifts from 4th to 5th before Max torque is reached or downshifts from 4th to 3rd causing a torque spike) but I don't know if the ECU or the TCU will address these issues.
I heard that the TCU upgrade simply removes the limiter that protects the tranny from too much stress if the car has too much power.
My current SpeedInnovation's custom ECU upgrade included changes to the shift points (higher rev limiter) but does the TCU do even more in terms of unleashing more power?
Can some tuning expert explain what a TCU upgrade will do for a C55 and why it would be necessary?
I know that my car shifts too early (upshifts from 4th to 5th before Max torque is reached or downshifts from 4th to 3rd causing a torque spike) but I don't know if the ECU or the TCU will address these issues.
I heard that the TCU upgrade simply removes the limiter that protects the tranny from too much stress if the car has too much power.
My current SpeedInnovation's custom ECU upgrade included changes to the shift points (higher rev limiter) but does the TCU do even more in terms of unleashing more power?
Thread Starter
MBWorld Fanatic!
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From: So Cal
2006 Weistec 3.0L SC'd C55, 2006 MaxPsi PT6466 Turbo'd M3, 2019 Maserati GTS , 2020Alfa Quadrifoglio
I searched on-line and can see that only Renntech offers a TCU program for 600 and 65 motors which tells me it's only necessary for modded cars making over 700hp.
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EVE
So does this mean your car still doesnt perform correctly dude seriously it seems it just cant make the power. I heard that someone you know very well has the mods needed to make the H?S work correctly apparently it has been proven. Give him a call seriously
What are they telling you if we make it lock to a gear then it will make the power? LOL Robert only if you knew what it really was that is holding the power back.
Robert you will still be making the power you are now other than you will have a dyno sheet that displays more.... so in essence you will have a paper that say one thing yet your car will still not have that power to the ground since the locking software will be impossible to run all the time
for sure shift points dont make power they simply help on acceleration
What are they telling you if we make it lock to a gear then it will make the power? LOL Robert only if you knew what it really was that is holding the power back.
Robert you will still be making the power you are now other than you will have a dyno sheet that displays more.... so in essence you will have a paper that say one thing yet your car will still not have that power to the ground since the locking software will be impossible to run all the time
for sure shift points dont make power they simply help on acceleration
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From: So Cal
2006 Weistec 3.0L SC'd C55, 2006 MaxPsi PT6466 Turbo'd M3, 2019 Maserati GTS , 2020Alfa Quadrifoglio
So does this mean your car still doesnt perform correctly dude seriously it seems it just cant make the power. I heard that someone you know very well has the mods needed to make the H?S work correctly apparently it has been proven. Give him a call seriously
What are they telling you if we make it lock to a gear then it will make the power? LOL Robert only if you knew what it really was that is holding the power back.
Robert you will still be making the power you are now other than you will have a dyno sheet that displays more.... so in essence you will have a paper that say one thing yet your car will still not have that power to the ground since the locking software will be impossible to run all the time
for sure shift points dont make power they simply help on acceleration
What are they telling you if we make it lock to a gear then it will make the power? LOL Robert only if you knew what it really was that is holding the power back.
Robert you will still be making the power you are now other than you will have a dyno sheet that displays more.... so in essence you will have a paper that say one thing yet your car will still not have that power to the ground since the locking software will be impossible to run all the time
for sure shift points dont make power they simply help on acceleration
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Robert,
The 722.6xx transmission is a sophisticated, highly developed piece that can handle even the massive torque generated by modified E55 W211’s.
In D, the TCU automatically controls gear selection, shift timing, firmness, and the RPM at which they occur. Its outputs are based on vehicle velocity, W/S switch selection, and throttle position. The TCU, via ESP, can also force an appropriate downshift due to threshold braking, and prevent upshifts even at part throttle owing to high lateral acceleration forces, i.e., enthusiastic cornering.
In Manual mode, you should be able to hold any gear until the electronic rev limiter intervenes. Have you found that not to be the case? There is no third dimension to be had from TCU interloping.
Noticed that you and I have about the same number of posts. I’ve always endeavored to be a helpful, forthright, and technically contributing member. Please do not interpret my posts in your threads as a personal attack.
The 722.6xx transmission is a sophisticated, highly developed piece that can handle even the massive torque generated by modified E55 W211’s.
In D, the TCU automatically controls gear selection, shift timing, firmness, and the RPM at which they occur. Its outputs are based on vehicle velocity, W/S switch selection, and throttle position. The TCU, via ESP, can also force an appropriate downshift due to threshold braking, and prevent upshifts even at part throttle owing to high lateral acceleration forces, i.e., enthusiastic cornering.
In Manual mode, you should be able to hold any gear until the electronic rev limiter intervenes. Have you found that not to be the case? There is no third dimension to be had from TCU interloping.
Noticed that you and I have about the same number of posts. I’ve always endeavored to be a helpful, forthright, and technically contributing member. Please do not interpret my posts in your threads as a personal attack.
Thread Starter
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From: So Cal
2006 Weistec 3.0L SC'd C55, 2006 MaxPsi PT6466 Turbo'd M3, 2019 Maserati GTS , 2020Alfa Quadrifoglio
Robert,
The 722.6xx transmission is a sophisticated, highly developed piece that can handle even the massive torque generated by modified E55 W211’s.
In D, the TCU automatically controls gear selection, shift timing, firmness, and the RPM at which they occur. Its outputs are based on vehicle velocity, W/S switch selection, and throttle position. The TCU, via ESP, can also force an appropriate downshift due to threshold braking, and prevent upshifts even at part throttle owing to high lateral acceleration forces, i.e., enthusiastic cornering.
In Manual mode, you should be able to hold any gear until the electronic rev limiter intervenes. Have you found that not to be the case? There is no third dimension to be had from TCU interloping.
Noticed that you and I have about the same number of posts. I’ve always endeavored to be a helpful, forthright, and technically contributing member. Please do not interpret my posts in your threads as a personal attack.
The 722.6xx transmission is a sophisticated, highly developed piece that can handle even the massive torque generated by modified E55 W211’s.
In D, the TCU automatically controls gear selection, shift timing, firmness, and the RPM at which they occur. Its outputs are based on vehicle velocity, W/S switch selection, and throttle position. The TCU, via ESP, can also force an appropriate downshift due to threshold braking, and prevent upshifts even at part throttle owing to high lateral acceleration forces, i.e., enthusiastic cornering.
In Manual mode, you should be able to hold any gear until the electronic rev limiter intervenes. Have you found that not to be the case? There is no third dimension to be had from TCU interloping.
Noticed that you and I have about the same number of posts. I’ve always endeavored to be a helpful, forthright, and technically contributing member. Please do not interpret my posts in your threads as a personal attack.
on posts now...Good input but the dyno runs made by at least 10 different tuners all had the same problem of early down or up shifting. All the dynos were run in manual mode since the beginning. So are you saying that the early shifting is natural even with all the aftermarket power I added?
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Robert, what John is saying is that there should be no early shifting if you're in (M) Manual mode. It does not automatically upshift whatsoever until you hit the paddle. It will bounce off the rev limiter.
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Thread Starter
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2006 Weistec 3.0L SC'd C55, 2006 MaxPsi PT6466 Turbo'd M3, 2019 Maserati GTS , 2020Alfa Quadrifoglio
Thanks for your feedback but I've seen it do this myself everytime. Our C55s are true automatics even if you put in manual mode.
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My experience has differed. I've tried to use Manual on the drag strip but usually end up shifting too late and hitting the rev limiter so I stopped using it. Not sure why yours would be shifting early.
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2006 Weistec 3.0L SC'd C55, 2006 MaxPsi PT6466 Turbo'd M3, 2019 Maserati GTS , 2020Alfa Quadrifoglio
I spoke with a fellow C55 owner this morning and it looks like the extra power is causing the tranny to slip. Therefore I conclude that I will need the TCU to lock the tranny in 3rd or 4th. Same thing happened on his Supercharged C6.
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I haven't completely decided yet but the reason I put Powerchip is because I would like to give Vadim a shot since I've heard that SI may not have the 2006 files for a C55 and I know Powerchip, Renntech, Kleemann and Evotech does. Not sure about Veloce yet. I have also decided to get the smaller supercharger pulley directly from Magnusson (Mechtech and HPS won't sell me one) along with the Evosport UPD kit because I lost 1-2 lbs of boost after I installed the Kleemann Headers, Cams, Cats and res delete. It will need brand new programming anyway since so much will have changed.
The key reason I am not sure about considering Speed Innovation is that although Bosch and Siemens ECUs are pretty pretty standard across all European sports/luxury cars, the most recent years files are still necessary in my opinion to extract the most power. I am not fond of a hit or miss approach anymore.
The key reason I am not sure about considering Speed Innovation is that although Bosch and Siemens ECUs are pretty pretty standard across all European sports/luxury cars, the most recent years files are still necessary in my opinion to extract the most power. I am not fond of a hit or miss approach anymore.
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Well then, trust we will see you here…http://www.opentrackracing.com
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Well then, trust we will see you here…http://www.opentrackracing.com
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Thread Starter
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2006 Weistec 3.0L SC'd C55, 2006 MaxPsi PT6466 Turbo'd M3, 2019 Maserati GTS , 2020Alfa Quadrifoglio
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My experience at Willow Springs Race Track with a HPS supercharge [sic] C55 AMG Mercedes-Benz."My friend took me on a few laps in my own car and it handled much better than the instructors's Mustang. On the straights, it blew past almost everything on the course. There were 2 NASCAR cars, 2 Indy type cars, 2 modified Vipers, 1 Ferrari, 1 Ford GT, 1 Porshe [sic] GT3, several Porshe 997's, Boxters (sic), 1 E55, 2 C55 (Including mine), 2 M3s, 1 C32, 1 S4 and quite a few Vettes, Zs, G35s, Lancer EVOs, WRX-STIs and Mustangs."
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I just signed for Nov. 14 (Willow Springs). Bring an extra set of underwear.
Last edited by AMGSC; Nov 7, 2007 at 02:17 AM.
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2006 Weistec 3.0L SC'd C55, 2006 MaxPsi PT6466 Turbo'd M3, 2019 Maserati GTS , 2020Alfa Quadrifoglio
