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Thread: DIY remap 05 preface 1.9 cdti 120ps z19dt

  1. #1
    Regular Member yysnet's Avatar
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    Default DIY remap 05 preface 1.9 cdti 120ps z19dt

    I have my car remapped by myself and really feels good.

    The tooling involved are: WinOLS Demo and Ultraedit and Matlab and an DSP board (or any equivalent eeprom programmer)
    WinOLS for finding the map, Ultraedit for edit the mod, Matlab for calculation, DSP board is for programming the eeprom in ECU.

    What I did (in case you are interested):

    Switch off EGR in ECM and blank the EGR valve.

    Change the torque limiter (TL) to allow 360 NM between 2000-3000 RPM. This is equivalent to stock 150ps.

    Change the driver wish according to the TL

    Change the torque to injection quantity (IQ) conversion map to allow 400 NM input

    Change the IQ limiter by RPM and by temperature. To ensure the torque are not limited until 90 degrees.

    Change the rail pressure for better timing. (SOI is stock to avoid damage)

    Calculate the expected MAF and AFR by using rail pressure map, boost pressure map, IQ map and TL map.

    Optimised the Lambda map (Smoke limiter map) according to expected MAF and AFR to avoid this map from limiting the IQ, and to minimise the smoke.

    Get the car logged today, drives good, smooth and can feel much powerful, have a friend following me, reported with no smoke. The instant MPG rised about 4-8 for a known road. Will report real MPG increase.

    Will use a can-bus flasher later, because it's really a hell to take ECM off (i only loose the upper bolt ECM plastic bracket and take it off by applying force...).


  2. #2
    Regular Member yysnet's Avatar
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    Some interesting graphs:

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    Regular Member zafira's Avatar
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    Nice presentation you have there . Are you going to have rr - test to se the results?

    Can DSP board program via OBD?

    Btw, my z19dt pulls 170 hp / 400 nm.

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    Regular Member coldo's Avatar
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    That's very impressive work. Well done you mate for working this out.

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    Regular Member yysnet's Avatar
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    Quote Originally Posted by zafira View Post
    Can DSP board program via OBD?
    Btw, my z19dt pulls 170 hp / 400 nm.
    No, the DSP board is just a generic DSP, it have the capability to talk to OBD but no time to figure it out.

    170 is not a problem if raced the turbo and rail pressure, but bear in mind that i am on stock turbo, stock DMF, stock clutch, stock air filter (All standard for a poor man lol).....

    AND PS: no extra £ for RR lol

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    all very impressive if completly over my head

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    Regular Member zafira's Avatar
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    Quote Originally Posted by yysnet View Post
    No, the DSP board is just a generic DSP, it have the capability to talk to OBD but no time to figure it out.

    170 is not a problem if raced the turbo and rail pressure, but bear in mind that i am on stock turbo, stock DMF, stock clutch, stock air filter (All standard for a poor man lol).....

    AND PS: no extra £ for RR lol
    But what tool did you use to write the map in to ecu?

    I use stock turbo and boost 1,56 bar up to 2800 rpm and 1,64 further. Rail pressure its 1700 bar at max. I have also de-cat/dpf to get flow. Egr is shut down to ca 10 % (i got eml with less) and injector time are changed. The is like new, with + 400 nm between 2100 - 2800 rpm.

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    Regular Member zafira's Avatar
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    Quote Originally Posted by yysnet View Post
    No, the DSP board is just a generic DSP, it have the capability to talk to OBD but no time to figure it out.

    170 is not a problem if raced the turbo and rail pressure, but bear in mind that i am on stock turbo, stock DMF, stock clutch, stock air filter (All standard for a poor man lol).....

    AND PS: no extra £ for RR lol
    But what tool did you use to write the map in to ecu?

    I use stock turbo and boost 1,56 bar up to 2800 rpm and 1,64 further. Rail pressure its 1700 bar at max. I have also de-cat/dpf to get flow. Egr is shut down to ca 10 % (i got eml with less) and injector time are changed. The car is like totaly another with + 400 nm between 2100 - 2800 rpm.

  9. #9
    Regular Member yysnet's Avatar
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    I got egr removed from map. Currently I am remap by removing the ECM and write the EEPROM by my home brew tool. Later will become a can bus flasher.
    I don't set the soi until I got a cylinder pressure sensor, to avoid a big bill from my pocket. I guess in cold Norway you could have -3cad without problem?

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    Regular Member yysnet's Avatar
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    Just to report that the engine defo runs better, easy start, faster response to pedal, pulls faster, and the most important, MPG rise about from 48 to about 53 in an A road ave speed 50mph, outside 5deg, heater on.

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