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Thread: BITDI TDI Tuning Box Crdt4 short review

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  1. BITDI TDI Tuning Box Crdt4 short review 
    #1
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    So I have had the tdi tuning box for few months now and I finally decided to go Remap route with @Bobby singh and booked with him for the 15th.

    I have allready covered well over 15k miles with the box. At max setting 7, you definitely feel the extra torque but overall a bit tame compare to even some generic maps (Celtic Tuning) that I had on my previous cars which is to be honest expected with tuning boxes in general.

    At max setting, there is definitely over fuelling issue as the dpf regen happens more often.

    There is also quite a bit drop on mpg with the tuning box even though on the dashboard it shows the opposite averaging 55-60mpg doing 70mph when in reality I'm getting around 44mpg

    Sweet spot seems to be setting 4 or 5.

    I never got the car dynoed with the tuning box on so I can't really comment on power gains.

    Would I recommend it to others? Hmm well yes and no honestly the reason I went for tuning box in the first place was for warranty reasons and so if you are also planning to keep your warranty, its one way of gaining little bit more power but I still recommend proper remap ideally a custom one.

    If anyone is interested, I'm planning to sell my crdt4 box used on 65 plate 2015 A6 Avant bitdi. It was purchased directly from tdituning on end of april and had it fitted at their headquarters Chelmsford.

    If I can be bothered, I'm going to try to get the car dynoed probably at Surrey RR after getting remap done with Bobby to see the results. Expected figures depending on the cars health is around 400bhp and between 820-850nm torque.

    I honestly can't wait to drive a car with 400bhp as the current power with tuningbox is the most I have experienced driving though have been a passenger in a 6.2 c63 amg estate for a 10 min journey.

    I have to say I do feel the gearbox software mapping on these cars are a bit disappointing. Nearly half the time I feel the car is somehow on the wrong gear. I wish there was a way we can tune/remap the ZF 8HP boxes.

    Also is there trusted gearbox specialist then can do a proper full gearbox service on these boxes ideally around North or East London area though I am willing to travel. The cars mileage currently at 55k miles and from what have found online, recommended gearbox service is at every 60k miles? I average 40-50k miles a year and planning to keep the car for at least 5 years.

    Thanks for reading.
     
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  2. Re: BITDI TDI Tuning Box Crdt4 short review 
    #2
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    Good for you, Bobby is one of the few people I would whole heartedly recommend for tuning, the guy knows his stuff. Definitely superior to a tuning box.
    Quote "My tuner told me after he fitted the box that 0-60 should be around 2.6 seconds! "
     
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  3. Re: BITDI TDI Tuning Box Crdt4 short review 
    #3
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    As I mentioned on ASN:


    If you want to put this car on the dyno then I would recommend installing a wagner intercooler, these cars suffer from heat soak on the dyno very quickly due to the position of the stock intercooler.

    For example I've seen fuel cut by 15mg due to egt protection on the dyno but on the road this doesn't happen. Its why I prefer to use the road for tuning as the dyno is just a figure. Off course many tuners just turn off all protection so the car makes nice curves (not my style).

    If you want to measure real life performance differences I would recommend doing a 0 to 120 (on a private road) and plot your results. Then you can overlay them with Stock, tuning box and remap.

    As for the gearbox I think you will find to tune these gearboxes correctly you need ZF software document together with matching project files, which are very hard to find. Then you have the issue of finding which maps are in use. This means you edit the correct map rather than just making unrequired changes in the tune.

    xHP do the gearbox tuning the correct way by reversing the software but this is a no easy task for a tuner to do - its why Im keen for them to release a solutiuon for Audi's.

    Cheers
    Bobby
     
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  4. Re: BITDI TDI Tuning Box Crdt4 short review 
    #4
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    I can recomend these guys for a gearbox service VWAudiTec | Audi, VW, Skoda & Seat Specialists Chelmsford, Essex & Bishop's Stortford, Hertfordshire | VWAuditec. Never used this company but they advertise gearbox tuning 403 Forbidden, might be worth a call.
     
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  5. Re: BITDI TDI Tuning Box Crdt4 short review 
    #5
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    Thanks I will give them a call.
     
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