Diesel Car Chiping/tuning Box?

Discussion in 'Technical Help' started by Moe, Jun 9, 2018.

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  1. Red Thunder

    Red Thunder Elite Member

    Dec 2, 2014
    High Wycombe
    Mine turned up next day, jiffy bag, no packaging box and no protective bag

    Installed it Sunday and yep, definite difference.
    On my diesel there is more torque low down, at 30mph I am now in 4th gear instead of the usual 3rd
    Best bit us there is no more lag, I used to put my foot down to pull away at a junction and wait 3 seconds for the power to kick in, now it is just there straight away. So much safer to drive

    Took 5 minutes to install and 15 minutes to find the best place to locate the box...I am keeping it in its default settings

    Cheers for the recommendation guys
    • Like Like x 3
  2. Moe

    Moe Well-Known Member

    Jun 10, 2015
    Hi mate, apologise for the extremely late reply...so after having it in now since August.
    Driving down to Pisa via Luxembourg, Black forest, Geneva and Genoa was great, returned 700-750 miles to a tank which is around 60mpg.

    Since coming back and using it in the UK where I find I can drive faster, I'm getting what I should be from the stated which is betqeen 45-55mpg.

    Performance wise...feels like the car has another gear..foot down at 70ish and shes off!!
    • Like Like x 2
  3. Moe

    Moe Well-Known Member

    Jun 10, 2015
    Thanks for looking into it. Like I've set mine to mid range so get around 160bhp...whatever it is it does make a difference
    • Like Like x 2
  4. sprintdave

    sprintdave Nurse,he's out of bed again

    May 25, 2014
    Just come back from having mine fitted, the car was in for a cambelt so got them to do it while they were at it. Good job coz it is real hard to get to the connector only car (308 pug) and my big sausage fingers would never have done it. They have routed the wiring nicely too and put it inside a wiring box that is on the car so I can get at it if needed and also it is out of the way of water.
    Drove home and what a difference, pickup is so much better. Wanna thank DD for changing my perception of these devices. The best 80 quid I have spent recently.
    • Like Like x 2
  5. Gazwhitespeed

    Gazwhitespeed Senior Member

    Jul 30, 2015
    Had mine on for 30,000mls now,couldn't afford to run the car without it,when i had it 28mpg now 45,paid for itself 20 times over at least.
    • Like Like x 4
  6. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller

    I've just had a very interesting conversation with a guy about these diesel tuning boxes.
    He makes his living tuning high performance Japanese & German cars. His clients think nothing of bills of £10,000+

    This is what he had to say about diesel tuning boxes...

    ..."They are designed to work on stock/factory engines. Primarily, they work by modifying the signal between various sensors on the engine & the control unit that the sensors talk to.
    For instance, if a sensor normally tells the cars brain the turbo is running at 0.5bar of boost. When you add a tuning box. It interrupts that signal & tells the cars brain a little fib that it's only running 0.3bar of boost. So the car compensates accordingly by upping the boost by 0.2bar. Therefore you end up with 0.7bar. That's where the extra torque comes from. If you ride that extra torque your mpg gets better.
    They are great & perfectly safe. But they don't work on modified engines. If the standard parameters have been altered. The tuning box does little or nothing.
    In my experience, diesel vehicles fitted with automatic transmissions give better results than those fitted with a manual transmission"...

    That makes much more sense than every description of how they work that I've heard prior to today :)
    • Like Like x 2
  7. littleade

    littleade The only sane one here

    Mar 17, 2015
    kidderminster Worcestershire
    The DTUK one I had on my mk2 vRS was a single channel one that plugged in between the ECU and the injectors by disconnecting the wire harness on the top of the engine alongside the common rail feed and was sold as an eco variant but in reality it did this by providing extra torque across the rev range. How it did this I'm not sure but it worked. You could get a different one that also plugged into the sensor on the exhaust manifold that offered more performance but made insurance more expensive.
    • Like Like x 2
  8. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller

    That's the type I've always purchased Ade.
    You're right, they work a treat :)
    The latest versions can be controlled by an App on your phone. Allowing the different maps (settings) to be changed without lifting the bonnet. Apparently, even whilst driving?

    IMHO, that's a bit of a gimmick. But it would be handy to demonstrate it to a non believer. i.e. they are driving & you're in the passenger seat switching it on/off or between the settings live.
    In that instance it would be impossible to deny the increased torque/power :)
    • Like Like x 1
  9. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller

    Hi RT,

    As I've dragged this thread back into the daylight.
    I thought I'd ask you how you're getting on with your tuning box 14 months on?
    Is it still giving great economy/performance results? And was it a good investment of £80?

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