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  #1  
Old 08-17-2021, 06:34 PM
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Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,732
Tuned 722.6 TCU: First Impressions

Finally got around to getting a tuned TCU for one of the CDI's. Easy to swap out...lives under the carpet in passenger footwell.

In addition to Comfort (C) and Sport (S), I now have Agility/Sport+ (A) and Manual (M) modes. By pressing the C/S button you toggle through the four modes. In manual, you shift gears by bumping shifter to left or right. When there is a need to downshift, that happens automatically, which is a nice feature.

So far I'm pretty impressed. Everything just seems smoother and tighter...no slop. Trying to decide whether to drive in A or S most of the time. $300 well spent.

FWIW the description from the tuner: "TCU tune really brings out ECU tune. Car feels like it's pulling faster due to modified lockup clutch engagement. Also torque limiters are modified, engine doesn't drop boost between shifts, so it just keeps pulling; shifts are quicker."

I'll live with this one for a few months then probably get another for the other CDI.

So, if anyone's looking to buy a new toy with any of that leftover stimulus money, this is it!

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06 E320 CDI "Benson", Platinum Blue, 182k mi, Stage 1 tune, tuned TCU
06 E320 CDI "Rutherford", Black, 156k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 135k mi, wastegate conversion

19 Honda CR-V EX 28k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife

Last edited by shertex; 08-18-2021 at 11:52 AM.
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  #2  
Old 08-17-2021, 06:40 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: Eastern TN
Posts: 20,820
Are these custom tunes or options available if you know your way around SDS?

Sixto
05 E320 wagon 175K miles
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  #3  
Old 08-17-2021, 06:52 PM
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Location: Barrington, RI
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Quote:
Originally Posted by sixto View Post
Are these custom tunes or options available if you know your way around SDS?

Sixto
05 E320 wagon 175K miles
My impression is that they're custom....but perhaps doable with SDS...or Vediamo.
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06 E320 CDI "Benson", Platinum Blue, 182k mi, Stage 1 tune, tuned TCU
06 E320 CDI "Rutherford", Black, 156k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 135k mi, wastegate conversion

19 Honda CR-V EX 28k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife
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  #4  
Old 08-17-2021, 08:08 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,424
Who did you source it from?
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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 101k - mine - (OC-104,600)
'17 Metris(VITO!) - 24k - wifes (OC-25k)
'09 Sprinter 3500 Winnebago View - 57k (OC - 63k)
'13 ML350 Bluetec - 72k - dad's (OC-75k)
'01 SL500 - 92k(km) - dad's (OC-94,000km)
'16 E400 4matic Sedan - 107k - Brothers (OC-108k)
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  #5  
Old 08-17-2021, 08:32 PM
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Location: Barrington, RI
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Quote:
Originally Posted by pawoSD View Post
Who did you source it from?
Guy named Marcin Hoski...who was doing tunes for Alex at LegitStreetCars (heard about him from watching some of Alex's videos.)
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06 E320 CDI "Benson", Platinum Blue, 182k mi, Stage 1 tune, tuned TCU
06 E320 CDI "Rutherford", Black, 156k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 135k mi, wastegate conversion

19 Honda CR-V EX 28k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife
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  #6  
Old 08-17-2021, 08:33 PM
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Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,732
I will add that another reason I was emboldened to do this is that the guys at Sun Valley seemed to think that tuning the 722.6 TCU is a good idea.
__________________
06 E320 CDI "Benson", Platinum Blue, 182k mi, Stage 1 tune, tuned TCU
06 E320 CDI "Rutherford", Black, 156k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 135k mi, wastegate conversion

19 Honda CR-V EX 28k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife
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  #7  
Old 08-17-2021, 08:46 PM
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Join Date: Oct 2004
Posts: 4,034
If you have a K-tag (or clone) you can read and write the eeprom and flash in an EGS52 module relatively easy. One wire soldered to the board then a few connections at the pins gets it done. The best thing about the K-tag is that it will automatically correct the checksum when writing back to the module. I've spent some time futzing around with the TCU in my 06 Sprinter van trying to suss out which maps do what, with moderate success. With my busy season over I'm likely to get back to it soon.
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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE
104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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  #8  
Old 08-17-2021, 09:08 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,424
I don't have any major complaints about my 722.6's.....its slow but trusty in my Sprinter and adequate in the wagon.....

I wish there was a tune for the 722.9 that combined the quicker firmer shifts of the Sport Mode on my GLK with the lower RPM shifts of Eco mode....that'd be perfect.
__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 101k - mine - (OC-104,600)
'17 Metris(VITO!) - 24k - wifes (OC-25k)
'09 Sprinter 3500 Winnebago View - 57k (OC - 63k)
'13 ML350 Bluetec - 72k - dad's (OC-75k)
'01 SL500 - 92k(km) - dad's (OC-94,000km)
'16 E400 4matic Sedan - 107k - Brothers (OC-108k)
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  #9  
Old 08-17-2021, 09:55 PM
Registered User
 
Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,732
Here's a fun video of Alex and Marcin with the mods they did to a CDI.

https://www.youtube.com/watch?v=cjIYsfKEYKM

__________________
06 E320 CDI "Benson", Platinum Blue, 182k mi, Stage 1 tune, tuned TCU
06 E320 CDI "Rutherford", Black, 156k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 135k mi, wastegate conversion

19 Honda CR-V EX 28k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife
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