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[Diesel] How 2: Tune your turbo diesel

Discussion in 'All Model Vauxhall / Opel / GM / Holden How2' started by sir_bombalong, Feb 10, 2006.

  1. 09fwg123

    09fwg123 New Member

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    Location:
    oxford
    can icreasing the boost and fuel be done on the 1.7cdti?
     
  2. djgritt

    djgritt Below-Average Moderator Staff / Administrator VxON Club Member VxON Approved Trader VxON Club Staff

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    Location:
    North Dorset
    Drives:
    2006 Monaro S/C, 2016 Abarth 595
    Yes, but not by the methods discussed in this thread, as the Isuzu TD engine is a mechanical fuel injection system, and the CDTi is electrically controlled - you can get the ECU Remapped or Chipped - or try a Tuning Box
     
  3. 09fwg123

    09fwg123 New Member

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    Location:
    oxford
    thanks do you know if upgrading the intercooler will work well with a remap and gain a bit more power
     
  4. djgritt

    djgritt Below-Average Moderator Staff / Administrator VxON Club Member VxON Approved Trader VxON Club Staff

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    Location:
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    Yes, it can definitely help!
     
  5. ahappyuser

    ahappyuser Member

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    Location:
    Sibiu, Romania
    I used to read all the posts in this thread in an effort to better understand all the info posted in here (that's a lot). But I saw nobody asked this :

    Using the mod, after adding more fuel rotating the maxfuel screw on the pump 1/4 of a turn, what about starting in cold winter (I personally live in Romania where over last winter we have reached -21 degree C, that's generally a pain to start for any diesel). My engine is stock and started excellent after rotating all the cylinders once. But how easy my engine will start in cold winter mornings after giving more fuel per cycle but using the same volume of air for burning the mixture (I know that the starter is rotating the engine at only about 500rpm, please correct me if I am wrong). In other words, low rpm at cranking, more fuel but same volume of air, that's a mixture richer in diesel - is this same easily to compress and ignite for the engine? I forgot to mention my engine have 182.000km onboard.

    Sorry for my English, I need to improve it.
     
  6. Muerte

    Muerte New Member

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    Location:
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    440000km driven and it start fine on -31 celsius it's isuzu baby! tinkering with the max fuel and stuff does not affect the cold start up, preheat the engine with electricity and make sure those glow plugs are working.
    Bosch made glow plugs cost bit extra but are better than the other brand i cannot remember and they alos work about 3 years where other brand works year or less.

    This comes from arctic circle, Finland
     
  7. ahappyuser

    ahappyuser Member

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    Location:
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    Thank you for the optimistic answer, I am a little bit more confident now.

    My glow plugs are NGK D-Power (same as stock ones), with about 1 year of duty yet.
    I don't have webasto stock feature for my engine, mine was 'made for Austria'.
    I will go for the mod, this was my last concern about doing the required modifications.

    One more question, please : If I'll do the maxfuel 1/4 move and up the turbo on 1bar boost, but without touching the white ring, decat and with the stock air filter, will I achieve [90+...100bhp] ? I don't want to squize out every bit of power from the engine, my needs are : low mpg, a better acceleration and a relax behavior on the highway (now at 130km/h my engine is at 3200rpm, that's a little bit high for my taste).
     
  8. ahappyuser

    ahappyuser Member

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    Location:
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    Today I managed to remove the white ring whithout removing the inlet manifold.
    After I succesfully cut it out (but I think I pulled up the membrane too much somehow) now I'm stuck. The plunger won't go back entirely in his operating position, I tried to push hard on it but no chance at all. Also I can't remove it because the inlet manifool is on the way. The pin that is normally sliding on the plunger I think this time is entirely out and it won't let me push down the plunger back in it's normal position.
    Can someone help me with this strange situation ? What may I do next ?

    Any help will be trully apreciated.
     
  9. ahappyuser

    ahappyuser Member

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    Location:
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    Today I made some attempts to remove the inlet manifold. Saddly enough, I could'nt find a suitable bit for unscrewing the 8 bolts.
    Please someone could tell me what king of screw is that (it have 12 aces round) or the wrench type to rermove that bolts and the inlet manifold. It seems like it's a proprietary 8milimeter bolt.

    Sorry for my English, I try to improve it every day
     
  10. Paul TD

    Paul TD A tired Vxon user

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    Location:
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    Drives:
    95 Cav td cdx, 02 Toyota Corolla
    Hi. Your English is very good :)

    You'll need an 8mm 12 point socket for the bolts. I think there are five bolts and one nut. A wobbly extension will help as well because they are awkward.

    Don't forget the new manifold gasket (y)

    Once you have the manifold off you can have a good look at the pump plunger and diaphram.
     

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