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#1
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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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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen 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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Are these custom tunes or options available if you know your way around SDS?
Sixto 05 E320 wagon 175K miles |
#3
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My impression is that they're custom....but perhaps doable with SDS...or Vediamo.
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife |
#4
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Who did you source it from?
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#5
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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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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife |
#6
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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.
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife |
#7
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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 |
#8
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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.
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#9
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Here's a fun video of Alex and Marcin with the mods they did to a CDI.
https://www.youtube.com/watch?v=cjIYsfKEYKM
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife |
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