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Some facts about performance tuning

Discussion in 'Engine and Drivetrain' started by drifter, Dec 21, 2010.

  1. drifter

    drifter Regolare

    Messages:
    310
    London/Mumbai
    Some people might think that this is an aggressive approach, but I can't care less as it seems that some so called professionals are not quite as professional and make statements just to pretend being in the know, which I find rather annoying.

    With this thread I intend to take the mystery out of the performance tuning and show up the arguments of rogue traders.

    Performance tuning is not a miracle, but hard work and precision engineering. It is based on physical principles that can be used or abused.

    To get the most out of the combustion the objective is to get as much air in as possible, the right amount of fuel, the correct ignition timing as well as the fastest possible flame front development.

    To achieve the best result all 4 aspects need looking at separately. At the same time all four aspects have to be brought in line. To master this correctly is the art a professional performance tuner is a master of.

    Just plonking in a tuning box is not professional tuning. Nor is the adding up of different performance items professional.

    One of the tuning boxes promoted here show some fundumental flaws on the petrol turbos. They might gain power, but lose power in some Fiat applications towards the red line, which means that they can be lethal when extremely hard driven. Tuning boxes are popular in India due to the lack of chassis dynos. However, they are not the way forward.

    Adding a free flow filter is in very few cases an advantage. The term free flow filter is basically meaningless. A correctly designed air intake revision is something completely different. An AIR is developed to achieve a task based on mathematical calculations and not just something that flows better. The reason for the misconception is that air intakes do not have a constant flow, but a pulsing flow. This creates for the designer some problems but also opportunities.

    Claiming that an certain air filter brand is always helping as as valuable as for a hungry person knowing that bananas are curved. Of course a filter design can help flow, but the filter does not make an air intake revision. There is much more to it. AIRs can be tuned for power as well as torque. To get the best out of both worlds the designer has to resort to a combination of ideas. When done correctly the results are astonishing.

    Adding on a FFE can be as much hit and miss as a randomly fitted AIR. Primary pipes, secondary pipes and collector pipes are in a mathematical relation. One of the parameters can be chosen, which is the peak power point, but the remaining parameters fall into place after calculation. The term FFE is therefore about as misleading as the terms free flow air filter.

    To make matters worse AIRs and FFEs are in a relation too.

    All these changes require specific ECU maps. A tuning box will not show the results with some preset values. A dedicated re-map is absolutely necessary to get the optimal results. Anything else is bodging.

    There is many more aspects to cover, but the main point is to bring some transparency into the subject and further questions can be answered as we go along.
    3 people like this.
  2. jumu

    jumu Superiore

    Messages:
    969
    Chennai
    Hi Drifter,

    Appreciate your effort to explain and bring in transparency on the subject of performance tuning and adaptations, but it would do well if you will refrain from rubbishing all other modes of extracting additional performance.

    There will be many who will listen to your proven theories , appreciate and walk away , because it may involve many physical modifications. There will be a few who will go the disctance and enjoy your proven practice.

    We are a majority who know the weakness and advantages of our machines and we are conscious of the envelope we are in with regd to warranty, budget, impact of additonal power on components...etc A few of us just want some additional performance without the hassle of voiding warranty or spending too much. We may just feel the need to tap the accelerator and feel a surge without going into the nuances of technological explanation. We most probably would hold onto our cars for maybe around 5 years and not too much running, so the chance of any major damage happening during our period of ownership is minimal.

    I have a tuning box installed with an after market air filter and I am quite happy with the performance. I am not hiding that this is the reason I find your attempts at transparency a bit hollow and not entirely acceptable.

    Anyway, all the best for your India venture. The market is vast and every player survives without the need to be negative about the competitor. Be positive

    Cheers

    Abdul
  3. drifter

    drifter Regolare

    Messages:
    310
    London/Mumbai
    You obviously missing the point. First of all any modification that is not approved by the manufacturer voids the warranty. A tuning box can be detected even after removing if the manufacturer decides to check. And certain suppliers outright lie when they pretend different.

    I am not 16! I do this business for over 31 years. I have seen many so called tuners come and go and most of them are not standing up for it when things go wrong. And I can prove that many engines went up in smoke due to their unprofessional attitude.

    A performance oriented driver would wreck in quite a few cases engines with tuning boxes fitted. To be frank, I doubt that you know what it means to drive a Fiat the way they are designed, let alone a modified one.

    Since you are challenging me I tell you where I am coming from. I have written motor sport history, which none of the ones talked about have.
  4. racingkid

    racingkid

    Messages:
    32
    New Delhi
    Hi drifter, you are absolutely right about performance tuning what you said above. I would love to have my car tuned by you. I would have purchased tuning box back but my lack of technical knowledge and long time effects changed my decision. You have excellent knowledge and experience in this field which is good for us.
    Now you are in India, So I would expect that you will do tuning for Indian 1.3 MJD Punto along with Tjet. Can the booming sound of punto 1.3 MJD which is after 110-120 kmph be reduced with AIR along with other performance benefits. I am from Delhi. Own Punto 1.3 MJD(50k km driven). And when are you coming to Delhi after 25th Dec. meet in Mumbai.
  5. jumu

    jumu Superiore

    Messages:
    969
    Chennai
    Drifter,

    At no point had I questioned your credentials. So peace. I am only trying to tell that the route to a particular destination are many out of which on a scale of 10 the efficeincy may vary, with one of them being most ideal.

    One question. Are you sure the remap you do after the mods wil not tbe shown on the ECU scanner of the service station ? What if they find a deviation and decide to set the mapping to default setting ? Do we have to inform the service centre that a mod has been done ?

    Abdul
  6. drifter

    drifter Regolare

    Messages:
    310
    London/Mumbai
    I am not out for a fight. However, I will put any supplier in place when they are taking for customers for a ride. At the same time I am working with competitors and recommend their dervices when they are working on ethically sound foundations.


    Fiat's examiner (diagnostic equipment) can't pick it up. We over write the software in a way that the down load appears as factory. For technical reasons is no need that the service center knows. It doesn't affect any service schedules. If they update the software on particular ECU's the map goes back to factory, but then we can re-map the new software, which we usually do for a much reduced amount.
  7. drifter

    drifter Regolare

    Messages:
    310
    London/Mumbai
    I will not be able to come to Delhi within the next 8 weeks, but I will do so asap. Delhi is on the list of priorities. In any case, I would not touch your car before 2000km. I would like to set up a meet with the Fiat enthusiasts. You find me a hotel and help organising the meet and we are in business.
  8. racingkid

    racingkid

    Messages:
    32
    New Delhi
    You misinterpreted my mileage, I said 50k km i.e 50000 km. Well take your time and come as your plans. I will try to contact punto owners also. Any rough idea about remap and AIR budget, pm me if you can give an estimate.
  9. sahdk

    sahdk Novizio

    Messages:
    37
    Navi Mumbai
    shall appreciate help from anyone with the snaps of the engine well where the tuning box is fitted in Linea MJD. There is a plastic cover over the engine. how that is removed. Help please.
  10. drifter

    drifter Regolare

    Messages:
    310
    London/Mumbai
    Just pull hard.

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