Top gear slow?

Discussion in 'The Beginner' started by Dafydd_Cymru, Dec 22, 2015.

  1. Dafydd_Cymru

    Dafydd_Cymru Funster

    Joined:
    Sep 15, 2015
    Messages:
    92
    Location:
    Wales
    Ratings:
    +59
    Hi. Been going locally in a Ci 141 2.8JTD to get used to her and see what I need to do to her. Been great only had to fir a rear calliper and that it. I'm curiouse aboutthe top gear as I have not driven a MH before. She speeds up fast enough 1-4. 5 speeds up slow on the level and holds it own on a slight hill. But it is a slow acceleration in 5th and any extended hill and I need to change down to 4th. Just checking is this the norm to have very little power in 5th? I should point out I drive a Jeep Commander that shifts in top gear but is no where near the weight.
     
  2. TerryL

    TerryL Funster Life Member

    Joined:
    Mar 5, 2010
    Messages:
    1,863
    Location:
    North East
    Ratings:
    +2,206
    No expert on your model (no doubt someone will be along shortly to comment), but top gear on many vans tends to be more of an "overdrive", especially the older engines, it being there to provide a quieter and supposedly more economical cruise. The downside is that it tends to take the revs out of the best torque band so it appears to be down on power. Doesn't help either if you're fully loaded.

    Not confined to older models though - my 07 Ducato 2.3 Multijet sometimes needs a change down on hills to avoid the motor "labouring".

    Experiment with different driving styles, watching your fuel consumption at the same time, and you'll soon find out what works best for your particular vehicle.
     
    • Like it Like it x 1
  3. HymerB544

    HymerB544 Funster

    Joined:
    Apr 25, 2012
    Messages:
    752
    Location:
    Near Truro, Cornwall
    Ratings:
    +803
    What you describe sounds normal to me, and I have had two quite different vans with that engine. An overcab Dethleffs and our current A class Hymer. Compared to modern (car) Diesel engines, of which I have had many, the 2.8 feels unrefined and industrial, but - importantly - has never let me down and feels as though it will run forever. I find it performs best at around 2500-3000 rpm and when touring usually try to keep it nearer 2500. Gary
     
    • Like it Like it x 1
  4. jonegood

    jonegood Funster

    Joined:
    Jun 10, 2010
    Messages:
    983
    Location:
    Shrewsbury (sometimes)
    Ratings:
    +1,860
    Hi

    I think you will find that era ducato came with the option to change the top gear ratio, either an overdrive or a lower ratio closer to 4th.

    Also the 2.8jtds respond well to a remap boosting them up to about 160hp.

    Remap is the cheaper option and widely available, or there is a firm in poole who will change the gear ratio for a few hundred quid ( my brother-in-law had this done to up gear his hymer)
     
  5. Peter Ashcroft

    Peter Ashcroft Funster Life Member

    Joined:
    Aug 14, 2015
    Messages:
    123
    Location:
    Wigan
    Ratings:
    +104
    I had ours remapped and it made a huge difference to top gear, ours was similar and constantly changing down on a slight incline, remap cured it.
     
  6. Chris

    Chris Funster Life Member

    Joined:
    May 5, 2010
    Messages:
    17,343
    Location:
    kent
    Ratings:
    +59,739
    My wife only changes out of top gear in the motorhome going up motorway hills when the engine starts to struggle.

    I slam it down a gear at the start of the hill.

    Who is doing it right because we always argue about it?
     
    • Like it Like it x 1
  7. Bertie Bassett

    Bertie Bassett Read Only Funster

    Joined:
    Jul 25, 2014
    Messages:
    2,743
    Ratings:
    +8,851
    Come on Chris, we both know the 'right' answer to that.......;)
     
    • Like it Like it x 3
  8. Bertie Bassett

    Bertie Bassett Read Only Funster

    Joined:
    Jul 25, 2014
    Messages:
    2,743
    Ratings:
    +8,851
    Very, very true Dafydd, and Chris Evans and his band of unknowns haven't even started yet...:xrofl:
     
  9. HymerB544

    HymerB544 Funster

    Joined:
    Apr 25, 2012
    Messages:
    752
    Location:
    Near Truro, Cornwall
    Ratings:
    +803
    Obviously you enjoy living life on the edge, making a statement like that, so in the spirit of supporting the losing side....."what, you let the wife drive??"...pass me the hemlock now, before i am forced to eat the poisoned mushrooms. Oh, change down early!
     
    • Like it Like it x 1
  10. teensvan99

    teensvan99

    Joined:
    May 17, 2015
    Messages:
    226
    Location:
    Margate
    Ratings:
    +283
    We had a tag Burstner with 2.8jtd. Like a slug uphill. Put the lower 5th gear in and chipped it. Well worth £550. Drove like a different van after alterations
     
  11. pigginchilli

    pigginchilli Banned

    Joined:
    May 17, 2015
    Messages:
    388
    Location:
    Town Yetholm
    Ratings:
    +467
    Our van has the 2.8 jtd and fourth is noisy and fifth quiet, she does struggle on inclines on motorways in fifth but after saving for years for a motorhome this doesn't bother us, being at home working and not in her does. DSCF8096.JPG
     
    • Like it Like it x 3
  12. Dafydd_Cymru

    Dafydd_Cymru Funster

    Joined:
    Sep 15, 2015
    Messages:
    92
    Location:
    Wales
    Ratings:
    +59
    Thanks for all the replies. Maybe it is because it is the first and heavy truck I have driven. I probably compare it to the Jeep I usually drive.
    Can anyone recomend a place where I can get the MH chipped and the gearbox done? I would imagine more power involves a loss of MPG?
     
  13. jonegood

    jonegood Funster

    Joined:
    Jun 10, 2010
    Messages:
    983
    Location:
    Shrewsbury (sometimes)
    Ratings:
    +1,860
    I would try remapping it first and only do the gear if your not happy with the results, because the lower gearing will mean more fuel and noisier.

    Jon
     
    • Like it Like it x 1
  14. jonegood

    jonegood Funster

    Joined:
    Jun 10, 2010
    Messages:
    983
    Location:
    Shrewsbury (sometimes)
    Ratings:
    +1,860
    sorry, forgot to answer the question.

    we used wow
    others have used boosters

    but a quick search on your locale or a visit to one of the shows i'e' peterborough.
     
  15. JockandRita

    JockandRita Funster Life Member

    Joined:
    Aug 2, 2007
    Messages:
    6,284
    Location:
    Lincs/Cambs border
    Ratings:
    +18,852
    @Dafydd_Cymru, I'm with Jon on that option.

    Although the older 2.8TDi, where mapping isn't available, I had the option of going for the lower ratio when I had the 5th gear and syncromesh replaced due to failure. I stuck with the original higher ratio, and am pleased now that I did.

    Good luck,

    Jock. :)
     
  16. rosalan

    rosalan Funster

    Joined:
    Jul 12, 2013
    Messages:
    1,173
    Location:
    Beds
    Ratings:
    +1,392
    In answer to your wifes driving method, I was taught that a diesel can be run at lower revs than a petrol engine, where keeping the revs up gave better performance.
    Top gear is designed for economy on motorways rather than for power performance.
    I may be out of order but re-mapping may give more power, or speed but at the expense of economy or so I believe.
    Alan
     
  17. Gooney

    Gooney Funster

    Joined:
    Jun 2, 2010
    Messages:
    4,808
    Location:
    Flintshire
    Ratings:
    +9,644
    Bit of a shot in the dark but has t got the original size wheels on it?, 15 and 16" wheels fit the hubs but if 16 fitted instead of 15" you could struggle in top gear without gear ratio's changed
     
  18. friar tuck

    friar tuck Read Only Funster

    Joined:
    Nov 15, 2011
    Messages:
    179
    Location:
    redruth cornwall
    Ratings:
    +169
    i have a 2000 2.8jtd its the same as you describe im running a 4500kg taga xle,im not 100% sure when the starting point was for remapping mine is too old,i think it may be 2003 and younger,i have had 3 new vito vans for my business remapped by Celtic tuning and the results were impressive more power but if you drive using the torque more economy.
     
    • Like it Like it x 1
  19. Jaws

    Jaws Funster Life Member

    Joined:
    Sep 26, 2008
    Messages:
    19,086
    Location:
    Narrfoook
    Ratings:
    +27,884
    Our previous van was a 2007 2.8 JTD and that struggled in top at the merest hint of a hill
    Ended up getting WOW to do a custom remap ( they did the usual remap but it was awful, had another go, did some testing and then redid it a third time and it was a charm.. The chap said he was gonna be using that map on some applications after all the testing :) )
    Ended up getting better torque and providing I kept the revs down to 2k or less managed a creditable 24mpg in the end
     
    • Like it Like it x 2
  20. jonegood

    jonegood Funster

    Joined:
    Jun 10, 2010
    Messages:
    983
    Location:
    Shrewsbury (sometimes)
    Ratings:
    +1,860
    DONT do this without a lot of research, the hubs arent all the same. from personal experience.
     
Loading...

Share This Page