Chipping a Nav

Discussion in 'Fifth Wheelers' started by syranara, Mar 27, 2010.

  1. syranara

    syranara Read Only Funster

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    We have a D22 Nav 03 reg, turbo diesel. Has anyone put a chip in one of these and if so do you recommend it?

    What are the pros and cons for putting a chip in?

    Just a thought as although we are happy enough with the way it performs we are always looking for ways to improve - failing buying something newer and bigger :Rofl1:

    Thanks.

    Mick & Marion
     
  2. motorvating

    motorvating Read Only Funster

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    Don't chip, that is old technology that works by fooling the ECU, not good.

    Have the ECU remapped, you won't regret it. A remap will provide a more powerfull and smooth power curve which means more torque all the way through the range, thus less changing gear, which means fuel savings.

    Apart from performance vehicles, engines generally use between 50 and 70% of their potential power, and this is due to climate. Manufactureres have to design their engines to operate in every climate the world has, so they take a low performance configuration that works in all these climates. Now in the UK with its temperate climate, we can tune our engines for more power without any detriment to the engine.

    If you do remap you will have more torque, and you will use it, so you need to make sure the breaks can handle the extra power. I have a highly moddified car with 95% of engine potential used, and found porcelain pads with vented discs can cope with the power upgrade.
     
  3. dazzer

    dazzer Read Only Funster

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    If your not bothered about the way your truck performs why are you wanting to up the power??

    I had a Navara, it couldnt pull the skin off a rice pudding, I dont have it any more :Rofl1::thumb:
     
  4. Wheelie

    Wheelie Read Only Funster

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    Not sure about the D22 but you cant remap a D40 Navara, tried to have mine done but to no avail, its to do with the nissan ECU they seem to have encrypted it in some way
     
  5. zaskar

    zaskar Funster

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    Not sure that's correct mate.
    Have a look on www.nissan-navara.net
    I've seen loads of posts on there about re-mapping D40's.
    Problem is, Nissan are buggers for "flashing" the map when/if it goes in for service so you can end up back to square 1 and out of pocket.

    FWIW, I have the DTE single chip fitted (they now do a double chip as well) and it's awesome. Power is up to approx 214bhp but I also have a K & N panel filter fitted. (2008 Auto).

    Last week, the Cat & Fiddle from Macclesfield to Buxton was no problem at all, even with a fairly heavy (for a Euro pick up) Kountrylite attached.
    Fuel for the whole weekend came out at approx 15mpg, which, considering such a punishing route, I was well happy with.
    Sunday afternoon, after we got back to our base site and dropped the rig off, we then had to go to East Midlands Airport to pick up my folks and solo, at 60 mph, I got her up to 33.6MPG. Pretty good considering the later Euro 4 spec D40's aren't know for thier fuel consumption!:thumb:

    Remapping is a very good option, just dont totally discount chipping.................just make sure its the right chip, cos most will send D40's into limp mode!:Blush:
     
  6. Macytia

    Macytia Read Only Funster

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    DTE or DTUK is a plug in tuning box and not a "chip or Remap"
    It connects to the fuel rail and increases rail pressure.

    Until recently Navaras have not been remapable, there is now a tool that will access the ECU called Pissani, they are 12k a piece and only a few in the UK, thats why most tuning companies cannot Remap them.

    Remaping and Chipping end in the same result, its just the method used depending on the chip or processer in the vehicles ECU.

    HTH

    Gary
     
  7. Bulletguy

    Bulletguy Read Only Funster

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    To quote from a posters recent unfortunate experience, he had a merc powered mh which had broke down in France. Garage took it in and told him the engine needed a total replacement. When he eventually returned to the UK complete with knackered engine in tow, his local Merc specialist examined the engine with respect to a claim.

    Didn't take them very long to arrive at a conclusion. It had been chipped. End of claim.

    Morale of this is if you chip a standard production engine.....then its at your own risk!
     
  8. pappajohn

    pappajohn Funster Life Member

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    increasing the rail pressure just introduces more fuel, probably increasing unburnt fuel emmisions.....
    to do it right the ECU also need remapping to alter injector timing and duration periods.
     
  9. zaskar

    zaskar Funster

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    Not strictly acurate.

    DTE plugs onto each individual injector, not the pressure sensor on the fuel rail.
    It's it claimed to be this difference which stops the DTE throwing Nav's into limp mode when other chips will.:thumb:.........................and, purely as a matter of interest, could you explain the difference between a chip and a tuning box cos I thought they were one and the same?:Smile:
     
  10. zaskar

    zaskar Funster

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    As a matter of interest, have you had the crankshaft/big end bolt mod done to your D22 ?
    They gained a bit of a reputation for throwing rods through the block due to bolt failure.
    Not sure I'd like to increase power on this engine until I was sure that had been done first.:thumb:
     
  11. Macytia

    Macytia Read Only Funster

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    Older ECU's had write once chips, they needed to be replaced hence "Chipping"

    ECU's 1998-2004 ish has "Chips" fitted that could be erased and reflashed via the cars OBD socket

    2004 onwards generally have a processer on the board which stores all of the cars maps, this way orf retuning is called "Remapping"

    Basically modifying all of your engine management paramaters to produce more power and more importantly torque. Remap/Chip are the same just the method of doing it, we became lazy and started doing things the easy way, 95% of time without lifting the bonnet.

    Your DTE box is a Plug and play Tuning box which increases fuel pressure, whether its via the rail or wired directly to the injectors in your case. It will never be as good as a Remap, but until very recently has been the only way of getting more power from Jap 4x4's. This is the reason they are so expensive and you could get a car/motorhome Remapped for half the price.
     
  12. LesAshmore

    LesAshmore Read Only Funster

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    I don't know about getting a remap cheaper, I had one done on a Fiat MH that cost extremely close to £600, I have now the DTE system at £300 and as far as I am concerned it works just as well, My Navara before DTE I was averaging 19mpg locally now I average 23.7 locally, Not done a long journey yet but will be soon.
     
  13. Macytia

    Macytia Read Only Funster

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    I wish I could get away with charging £600 for a Remap:Rofl1:
     
  14. Bulletguy

    Bulletguy Read Only Funster

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    Both interesting points as most that 'chip' or 'remap' engines seem to overlook this.

    Increasing power in any standard production engine means you are altering the original 'spec' to make it do something it wasn't initially built for.

    During my days of 'modding' mini engines, the most common 'mod' was always the cylinder head.....because it was relatively simple to do and could be cheap. Few thought about modding the bottom end as well as that meant taking the engine out which also meant more work and spending more money! When the crankshaft went bang, some would wonder why! Many also failed to think about modifying the braking system.

    Easiest 'mod' of all was changing the carburettor to either a twin carb or better still, a twin choke Weber.

    Something i've not seen mentioned on this thread is the importance of declaring any modification to your Insurance. Have an accident serious enough to warrant the inspection of an engineer and you could well find yourself with a void claim.
     
  15. syranara

    syranara Read Only Funster

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    Many thanks everyone. I think we will stay as we are :BigGrin:

    We've managed to get down to Parc Verger (where we are now) with no problems. A bit slow on some of the steep hills but we made it!

    After all we're in no rush to get anywhere and the Nav runs along nicely and when used as a normal 'car' we love it.

    Can't be sure if it's been modded as we bought it from a guy who got it from a Nissan dealer.

    So hey ho we'll plod up the hills - we were just curious.

    Love it here on Parc Verger by the way even if it is raining :Rofl1:

    Mick & Marion
     

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