Remap ECU on Fiat Ducato 2.8 JTD

Discussion in 'Motorhome Chat' started by goneroming, Nov 8, 2015.

  1. goneroming

    goneroming Read Only Funster

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    After a lot of thought and research,
    had my Hymer B644 remaped by Quantum Remaps.
    What a great change it`s made !!
    Its increased HP from 127hp to 160hp that`s + 25 % & 300Nm to 370Nm that`s 23% gain.
    It has made the motorhome much more pleasent to drive, the engine is a lot more flexible, feels stronger, pulls much better, less gear changes.
    There also should be a fuel gain to because you will not have to change gear as often.
     
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  2. pappajohn

    pappajohn Funster Life Member

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    An increase in power usually means more fuel...you dont get something for nothing.
     
  3. tonka

    tonka Funster Life Member

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    I had my 2005 Autotrail 2.8jtd done and yes it made it pull a lot better, less changes etc.
    However never found any real increase in mph but in some cases made it worse as I tended to drive like a boy racer :(

    Maybe that's just me. :doh:
     
  4. jezport

    jezport Funster

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    At 160bhp your clutch wont last long.
     
  5. scotjimland

    scotjimland Funster Life Member

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    Also have b644 with the same engine and find it more than adequate, pulls well on hills and cruises at 70 with ease..
    MPG is about 27..

    Have never considered a remap and not interested either ..but that's just me.. I'm happy as it is.
     
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  6. Charlie

    Charlie Funster

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    A remap will increase not decrease MPG... The clutch providing it's in good condition will absolutely fine provided racing starts are avoided. Once the pedal is in the up position and the clutch fully engaged the power can br used very safely. 160 BHP while above the design parameters is not huge power.

    I just love it how some love to jump in and become critics ....
     
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  7. HymerB544

    HymerB544 Funster

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    Our B544 is unmodified and the best I have ever got is around 28mpg on a long run, using the more expensive BP diesel. Normally I get around 26mpg but I drive it steadily, and don't often exceed 60. Would I like a little more power? Sometimes. When loaded I'd like to be able to get up the hill on the A30 heading North by the Fraddon/Grampound exit without having to go down to third, but I can live with that, and like plastic surgery, I don't think anything good can come from tinkering with the original spec!
     
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  8. jezport

    jezport Funster

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    I've read on a number of forums that the 2.8jtd clutch often starts slipping after remapping. 25% increase in bhp is a big jump so has to put more pressure on the clutch.
     
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  9. Charlie

    Charlie Funster

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    Manufacturers when they set the tune on cars and vans have set of parameters they must work within . These are to get engines within certain limitations to pass stringent emisions. There are all manor of things engineers have to do to get an engine within said limits. Drive by noise tests included.

    This often means an engine while conforming to the limitations is not performing at its best.

    Remapping engineers have no such limits to adhere too. So they can change things like fuelling and boost pressure which will get the engine performing to its optimum.

    A well remapped engine will give low down power where a stock engine doesent. This can mean not needing to change down a gear to overtake of climb a hill. They produce power where it's most effective. Great improvements can be had !!

    The clutch may be well within the limits of its capability. The increases in this case are not huge so unless the clutch is badly worn or poor driving IE rapid take offs are done it will be fine.
     
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  10. Charlie

    Charlie Funster

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    Using good quality fuel is absolutely the right thing to do.. It will help restore the performance taken away by the five percent Bio content of standard pump fuel. It's additives give an an increased cetain rating and a better burn which in turn will help prevent fouling of DPFs if fitted.
    There is no harm in tinkering with the engine tune so long as the tinkerer does not get greedy and look for too much power.
     
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  11. Jaws

    Jaws Funster Life Member

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    Yup.. Used !WOW tuning and had good results on the Miller.. ( 2.8JTD lump )
     
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  12. Microchip

    Microchip Funster

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    When we had our Hymer B584 done we had bags of power!...and the fuel consumption went from 28 mpg to 22 mpg, and it made the clutch slip when before it was perfectly OK.
    the two tests were done on two long trips in France.
    After 4 re-map changes I had the original mapping put back because of the poor mpg.
    Better to have good fuel consumption than an over powered engine.

    Keith..
     
  13. Charlie

    Charlie Funster

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    Sounds like the clutch was worn before the remap..
    The thing to remember is a vehicle needs to be fit and healthy or increasing the power will show any weaknesses . The clutches in these heavy vehicles have a hard life anyway.
    It is Very unusual to hear of worse MPG after mapping. But if the clutch was slipping your MPG would go down as power would be wasted.
     
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  14. ciderman

    ciderman Funster

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    the 160bhp is not a big jump and not outside the design because a high power version was made (157bhp) of the 2.8jtd
     
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  15. jezport

    jezport Funster

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    Why do Fiat fit a larger turbo on their 146bhp Ducato on the LHD version if a simple remap will give a reliable result? Too much extra power through an under sized turbo is a recipe for failures. Pulling a 4+ton motorhome up a steep hill with extra welly and extra power due to a 25% increase in power makes it a lot more likely for a failure of a major component.

    Ive been involved in modifying cars for a long time and before a remap you can gain extra power from fitting a better exhaust and a higher flow filter. (Better NOT bigger exhaust)Then after that you can go to remapping, but off the peg remaps are no where as near as good as getting the vehicle on a rolling road and doing a custom remapping.
     
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  16. jezport

    jezport Funster

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    Wrong, it was 146bhp. This variant had a bigger turbo and was only made in LHD as the turbo wouldn't fit in the RHD. Plus the gear box is modified on the 146bhp version.
     
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  17. Lenny HB

    Lenny HB Funster

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    As mentioned will put a lot of strain on the clutch you need to fit a heavy duty clutch, also with that much power increase the brakes need beefing up as well. Manufacturers always fit better brakes with higher power versions and they don't spend money unnecessarily.
     
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  18. jezport

    jezport Funster

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    True, I wouldn't advise 160bhp on a van without all round good sized disc brakes.

    Dont forget to advise your insurers if you have had a remap.
     
  19. goneroming

    goneroming Read Only Funster

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    That`s what most people would think, if you do the research its about tuning the engine
     
  20. goneroming

    goneroming Read Only Funster

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    That is spot on. ECU tunning can be done in different ways, 1. more speed, 2. more mid range useage, 3. or better fuel consumption.
    I choose mid range, because that`s where you want it in a large vehicle. The clutch is not a problem if used sensibly, its not about go faster, the whole package just gives a better driving experience, which works for me.
     
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