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  1. #1
    Established Member Two Rings
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    Tune options - DTUK Review

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    I installed the DTUK box this past weekend. I chose this route over an ECU tune for a few reasons.

    1. I am currently leasing the car and am not sure I want the buyout at the end. I really love the car, but who knows what will come out in the next three years that I may love more. RS4 sedan?

    2. I wanted something that preserved my warranty. Audi MMI can see ECU tunes and that does void the warranty. This box is installed post ECU and therefor has no residual data logged in MMI. It's also easily removed in about 10 minutes prior to any scheduled service.

    3. I have been down the modification pipeline and I just don't feel like dropping a metric ton of money on my cars that I will never get back outside of smiles per gallon. That being said, I donít plan any mechanical mods, so a tune option was the best for me.

    My initial impressions are as follows. I am not in any way affiliated with DTUK. I am only offering my impression and experience both with this box and tuning in general.

    My instinct, as usual, is to take the product and turn it all the way up and see if it blows my hair back (what's left of it). So, out of the box I went straight for the most aggressive setting on all three maps (plus 3). It definitely makes a difference. You can feel the additional power and torque. Under full throttle they pull like a madman with the shifts coming firm and on time.

    However, I found the gear changes a little choppy under casual driving when set to boost level 3. When using the dynamic transmission setting as well as S mode, you could feel the boost coming on strong and then a shift with no real rev matching. The shifts and acceleration were very notchy. Kind of like a saw blade.

    Armed with my butt dyno results I spoke at great length with Andrew from DTUK. He is a wealth of knowledge on both the tuning process DTUK uses as well as the B9 platform as he dailys a B9 S4. Andrew advised that the files are all designed to be used on the present (zero setting), damn they even add a little sticker to the box asking to email them before adjusting the box (oops i forgot to do that). I've now taken what I learned about both the tuning platform and the available maps and settings and am taking the prescribed approach to the product.

    After the verbal flogging from Andrew, I turned the boost back to the neutral (0 setting) levels and retested. Andrew would have me tell you emphatically to start conservatively and go up from there. The minus settings are still very quick. I am now on Map 2, boost setting 0. The car was much more composed. The shifts were smooth and the power still very present.

    I'll continue working with Andrew to make sure I move correctly through the map progression and settings to get the best results. I also have a dyno test set up in a couple weeks or so to get actual numbers on this car.

    I can say, coming from a long tuning and modifying background, that this is probably the best option for a tune for those that are not planning any mechanical modifications like intake, exhaust, downpipe, etc. This runs separate from the ECU and does not break any physical Audi seals.

    Maybe Audizine is more open to conversation on these types of things. Iíve found other forums to be very informative for things that live in the manual. But they would much rather debate crap like oil change frequency and the pros and cons of red brake calipers being included in the S Sport package.





    Imgur Album Link - Last pic is the engine bay with the box installed.
    Last edited by ibu11et; 09-13-2017 at 12:04 PM.

  2. #2
    Active Member Two Rings Stankia's Avatar
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    Nice writeup. How difficult is it to install? Any factory wire splicing required?

  3. #3
    Established Member Two Rings
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    Took me about 10 minutes. Each lead has two plugs one in for the factory wire and one for the factory sensor. No splicing each lead fits the factory perfectly.


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  4. #4
    Senior Member Four Rings Jimmy ny's Avatar
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    Only 2 plugs. Rennchip has a box and they use I believe 5 plugs plus a power line. You have to run power for this as well I assume? I'm interested to know how it much more boost it is requesting. How much was it? Rennchip is 795 with the Bluetooth option. They claim 420 hp.


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  5. #5
    Established Member Two Rings
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    2 plugs per lead. 3 leads. The Boost is variable the unit takes its power from the factory sensor wire.

    I always shy away from making HP estimations until I see it on the dyno. Even dyno results can be misleading depending on how itís configured. The stock Audi claim is 354. DTUK claims 410. All of this crank hp.

    I will dyno the car in the next couple weeks and get the whp before and after.

    I paid 539£ or $701 shipped. They shipped FedEx 2 day.


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  6. #6
    Established Member Two Rings
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  7. #7
    Active Member Two Rings
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    I have the same box -- Map2/-1 is the best for my car.
    Sub 4-sec 0-60's all day long;)

  8. #8
    Established Member Two Rings
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    Iím currently on 3-0. I may try 3-1 just to temper the boost a touch.


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  9. #9
    Active Member Two Rings
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    Ibu11et is your car an s4? B9?


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  10. #10
    Established Member Two Rings
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    Yes. It is a B9 S4.


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  11. #11
    Active Member Two Rings
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    I threw a code using 2/1
    2/0 & 2/-1 best so far. Ran 3/0 today and very good. I'm trying to find the map with the least turbo-lag. Ill try 3/1 tomorrow


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  12. #12
    Active Member Two Rings
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    Let us know what you learn on the dyno please;)


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  13. #13
    Established Member Two Rings
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    Will do. Dyno got postponed to Monday.


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  14. #14
    Registered Member Three Rings Thomas@TAI-VW's Avatar
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    Holy Audi rats nest. Damn,would you look at all that tubes/wires/STUFF.
    2012 S4,6MT. Steering wheel/4 rims & tires/seatbelts/windshield wipers/41 psi in front tires/40 psi in back tires/CD player/AC/sunroof/oil level=full/coolant=full/no CEL/glovebox/no car payments/dusty brakes/lowbeam/high beam/turn signals/small nick in the bumper from a stone about 1/16" in dia. about 4 " below the headlight/gas in tank/clutch-brake-gas pedals.

  15. #15
    Active Member Two Rings
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    It would be nice to see afr data from the dyno. Is there a wide band or sniffer option from your tuner? I'd be open to subsidizing your costs to see which maps are most stable.
    CB

  16. #16
    Established Member Two Rings
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    The dyno I had been referred to is really flakey and has really poor communication. I am currently looking for another all wheel dyno in the LA area.

  17. #17
    Active Member Two Rings
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    Let me know -- PM me if you want to discuss further.

  18. #18
    Active Member One Ring
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    Try Church Automotive Testing in southbay. I have had all my cars tuned there since 2003. Owner is Shawn and very professional. He uses a dynapack.

  19. #19
    Established Member Two Rings
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    I scheduled the baseline dyno for next Saturday the 19th. Now accepting donations ;P

    At Church Automotive, by the way. The guy was very friendly and answered th phone at 7:15 in the evening.

  20. #20
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    So today was the day. I had the car baseline dyno tested at Church Automotive Testing in Wilmington, CA. The test was performed on a dynopack all wheel dyno.

    We've seen a lot of claims. Finally I believe we have a definitive answer of where this car is. I am not a huge fan of manufacturer HP claims. They all like to publish brake horsepower number, or power at the crank. This is a good sum of how powerful a motor is, but doesn't relate back to actual power output. Many factors influence how much of that crank horsepower actually meets the road. 2WD, AWD, differential type, transmission type, etc. The real test of a car's power as a whole can be expressed as horsepower at the wheels.

    This is that test.

    Bottom Line?

    The stock claim is 354 BHP / 369 BTQ.

    This dyno returned 298 WHP / 366 WTQ

    These are pretty respectable numbers. If the manufacturer claim is to be believed (we have every reason to this it is accurate at the least, possibly understated), this represents a 18.7% loss of power in the drivetrain between the crank and the wheels. I have always operated on a rough estimate of 25% loss for an AWD platform. So this either represents a truly understated BHP claim from Audi, a more efficient drivetrain, or some mix of the two. We'll assume for the sake of conversation here that the manufacturer number is golden.

    The DTUK box returned similar values across the map settings I was able to test. I was able to test 2/0 & 3/1.

    DTUK results from map 3/1 - 337.62 WHP / 400.54 WTQ

    Based on the 18.7% difference we saw from stock claim to tested WHP, we can make a BHP estimation. The torque number related fairly well. I am not going to calculate a new number for this figure. I've driven plenty of high WHP/WTQ cars. This number feels accurate to my butt dyno.

    Calculated DTUK BHP - 401.06

    These are outstanding numbers in my opinion for a stand alone tune box. This box squeezed an additional 39.6 WHP & 33.72 WTQ through nothing other than tuning. The powerband is also more smooth and linear, even if it is mildly represented in the dyno results. You can see the dip in power and torque right around 3600 RPM. This seems to be smoothed out in the DTUK tune. It also seems based on my calculation, that the power gain is in the ballpark close enough to the DTUK claim that I cannot say their number is inflated. Especially since I could not run map 3/3 as I will explain below.

    The best part about this box is that we are seeing consistent AFRs returned. We can see that stock map stays a touch lean at 5500 where we get a bit more fuel on the DTUK box getting us closer to the goal of 12.5.

    There were some concerns I had about the dyno results although all would have produced lower than actual numbers rather than a higher result.

    1. The Audi hates being on the Dyno. I have the prestige drivers assistance package. I had to turn off all manner of sensors and doohickies to get the car to actually dyno
    2. Upon taking the car off the dyno, I realized the test was done with the sport differential in dynamic mode. This could cause minute braking and lower numbers depending on how the ECU interpreted the feedback from the dyno. I think the car should have been tested with sport dif turned off.
    3. The traction control was tough to keep off. It's again possible that there was some slight braking
    4. The car hates driving with the hood up. Therefore we saw some slight heat soaking since we couldn't point the fan right into the engine compartment. Oil temp was reading between 212 & 228 during the test. This would lower the test result from a max potential with a cooler motor.
    5. I couldn't test the 3/3 map because the car developed a sport dif error on the dyno. We had to take it off and I ended up having to drive 15 miles or so home for the ECU to clear the error. I don't think I'll be putting it on a dyno again unless I can find some sort of dyno code that turns everything off easily.


    Keep in mind that I do not work for DTUK. I have no skin in the game to make the results look one way or another. If I did, I'd have just parrotted the claims you see on websites and not sought my own results.

    Orange and Green are back to back stock baseline runs. No change in parameters.

    Pink & Light Grey/blue were DTUK map 2/0

    Brighter Blue was DTUK tune 3/1

    Special thanks to bicyclefitguru for throwing down some cash on the test.




  21. #21
    Active Member Two Rings GTburn's Avatar
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    Great write up....now we need to know your 1/4 miles time :)

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  22. #22
    Senior Member Three Rings Alessandro's Avatar
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    Thanks for the effort and write up, now we need some videos ☝️


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  23. #23
    Active Member Two Rings
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    Thank YOU for taking the time to test. I'm excited that the AFR ratios are good


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  24. #24
    Active Member One Ring
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    Nice that you ended up going to CAT! Thanks for sharing...im glaf afr's look good i was concerned about that since this thing was tuned/developed in Europe.

    So what setting do you use?

  25. #25
    Established Member Two Rings
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    Iím on 3/1. And the guys at CAT were awesome except for the shop hand was a bit of a douche.


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  26. #26
    Active Member Two Rings GTburn's Avatar
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    Quote Originally Posted by ibu11et View Post
    Iím on 3/1. And the guys at CAT were awesome except for the shop hand was a bit of a douche.


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    Have you tried 3/2 or 3/3? I have been switching back and forth between 2/1 and 3/1 and don't really feel any difference.



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  27. #27
    Established Member Two Rings
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    There isn't too much of a difference between 2/1 & 3/1 until you get into the higher RPM range from what I understand. The main difference in map application is from 1 to 2. It mostly has to do with how much of the tune is applied and when.

  28. #28
    Established Member Two Rings
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    I just switched over to 1/3. I've seen what the tune applications look like. This one was one of the most abrupt. Having driven on the ones that dole the power out a little more conservatively, I am now favoring this one for it's consistency. It requires a little more pedal modulation, but I feel equal to the task.

  29. #29
    Active Member Two Rings GTburn's Avatar
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    Quote Originally Posted by ibu11et View Post
    I just switched over to 1/3. I've seen what the tune applications look like. This one was one of the most abrupt. Having driven on the ones that dole the power out a little more conservatively, I am now favoring this one for it's consistency. It requires a little more pedal modulation, but I feel equal to the task.
    I tried this setting today as well. The car launches violently and I love it.



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  30. #30
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    Quote Originally Posted by GTburn View Post
    I tried this setting today as well. The car launches violently and I love it.



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    Just finished installing my box. Currently running 3/+1. Definitely a noticeable difference in both pull and smoothness of acceleration.

    Are you guys recommending 1/+3?

    I might give this a try tomorrow.

  31. #31
    Established Member Two Rings
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    I am still on 1/3 now. I like it very much. Try 1/0 and adjust from there.

  32. #32
    Active Member Two Rings GTburn's Avatar
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    Quote Originally Posted by jettaway View Post
    Just finished installing my box. Currently running 3/+1. Definitely a noticeable difference in both pull and smoothness of acceleration.

    Are you guys recommending 1/+3?

    I might give this a try tomorrow.
    I ♥️ 1/3

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  33. #33
    Active Member One Ring
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    Is it easy to explain what adjusting the second number achieves? Is it more throttle responsive or more feeling or torque pull?

  34. #34
    Active Member One Ring
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    Does this box help get rid of the throttle input lag?

  35. #35
    Active Member Two Rings GTburn's Avatar
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    Quote Originally Posted by OverBoosted View Post
    Does this box help get rid of the throttle input lag?
    No... there is still a few seconds of lag.

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  36. #36
    Established Member Two Rings
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    The lag is a transmission issue. Until someone develops a tune for that (it can be done), we are kind of stuck with driving in manual for spot on acceleration from a roll or out of a turn.

  37. #37
    Senior Member Two Rings
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    Quote Originally Posted by ibu11et View Post
    The lag is a transmission issue. Until someone develops a tune for that (it can be done), we are kind of stuck with driving in manual for spot on acceleration from a roll or out of a turn.
    I sent a message to Audi of America complaining about the lag and describing it as a safety issue. I specifically commented that it's a transmission tuning fault and something that seriously detracts from the Audi S-car driving experience. They sent me a lame ass reply that they were sorry my car suffers from turbo lag (!) and that I should have it checked out by an Audi dealer service center. It seems highly unlikely that Audi will offer a reprogramming solution. An aftermarket fix would be welcome but I fear it would void the warranty. Maybe if more owners complain to Audi...

  38. #38
    Established Member Two Rings
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    Quote Originally Posted by Twowheelsgood View Post
    I sent a message to Audi of America complaining about the lag and describing it as a safety issue. I specifically commented that it's a transmission tuning fault and something that seriously detracts from the Audi S-car driving experience. They sent me a lame ass reply that they were sorry my car suffers from turbo lag (!) and that I should have it checked out by an Audi dealer service center. It seems highly unlikely that Audi will offer a reprogramming solution. An aftermarket fix would be welcome but I fear it would void the warranty. Maybe if more owners complain to Audi...
    What a bunch of crap from them. We can all see the car in the wrong freakin gear before it shifts down. There is rpm advancement in a lag situation. This is like someone hit the pause button on the car. Especially out of turns.


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  39. #39
    Established Member Two Rings
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    Andrew from DTUK just started a WhatsApp group for additional questions. https://chat.whatsapp.com/6ep2IPRjWCZ7m6mhP7fKR2


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  40. #40
    Established Member Two Rings
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    Hi folks. There has been a change in my status relative to my relationship with DTUK and I wanted to get out in front of any rumor or curiosity as to the accuracy of my statement of non-affiliation with DTUK.

    At the time I wrote this review, I was not affiliated in any way with DTUK. Keep in mind that things do change. As impressed as I was with how the box functioned, I was equally surprised with how little exposure they had in the US market. I began working with Andrew, the owner of DTUK to bring distribution over to the states. Our conversation and the development of this relationship has been slow and deliberate. I am working with several outlets to become an official vendor and leading up to the completion of those deals, I wanted to set the record straight so there was no illusion of impropriety.

    I created an LLC called DT Power and was incorporated in Delaware on 10/3/2017 (Deleware backdates to the request date once an entity is granted, the actual date I received the approval was 10/30). This review was posted 2 months earlier on 7/25/17. I was impressed with how a product functioned. I saw there was no US distribution. I decided to invest my time and money to see if there could be something there and a way to get from a career I wasn't passionate about to one that I was. I actually just received my first shipment of tune boxes here in the states yesterday and wanted to come and update this thread explaining the development.

    Now that that's out of the way, here is my thoughts today after having the tuner on my car for about 4 months. (This time in the interest of "full disclosure" I do have skin in the game and I am a distributor for DTUK). However my S4 is my daily driver and I still have another job I need to get to that pays the bills. There is no way I would keep a malfunctioning unit on my car.

    Do I still love the box, yes.

    It still does everything it's advertised to do. I've got a bunch of other modifications on the car now and the box has grown with me. About a month in, the box started giving me a "U060B00 - Lost Communication With Turbocharger/Supercharger Boost Sensor "A" Unknown" error. This would occur randomly on startup and would clear if I turned the car off and restarted it. I spoke with Andrew about the issue and we added a slight delay to when the map kicks in to the parameters and this seems to have fixed the issue. Other than that, it seems to be golden. The drivability is still there even with a bunch of other modifications. I still stand by my initial review.

    For those that are curious, as the car currently sits, these are my mods.

    DTUK Tuner
    DTUK Pedalbox
    Millitek de-cat downpipe
    Custom exhaust with the stock resonators and silencer removed, replaced with Vibrant resonators
    Switchpath mod (unplugged bypass valves)
    Roc-Euro Intake with foam filter
    Eibach Pro-Kit lowering springs (Part number E10-15-023-02-22 .8" drop front and rear)
    VMR V801 wheels (8.5 et 35)

    Installing this weekend
    Integrated Engineering Intercooler (custom anodized black)

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