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petersbert



Member Since: 29 Dec 2020
Location: heeswijk
Posts: 4

Netherlands 2002 Defender 110 Td5 USW Barolo Black
Max fuelling td5
After installing bigger intercooler and hybrid turbo I want to adjust fuelling of the motor. Fuel tables are going to max 70 mg/stroke on my defender 2002. Older td5 cars (eur2, msb ECU)the tables even go to max 110 mg/stroke. I am capable of adjusting the table headers in the fuel-tables. How hi can I go? (now driving max at 70mg/stroke)
Post #876715 6th Jan 2021 5:54pm
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bankz5152



Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2173

2004 Defender 110 Td5 DCPU Epsom Green
Youll have to learn how to remap it. However its not just a case of " upping to fuel makes it go faster. " It will go faster however if done incorrectly will result in a rather jerky map with the power in the wrong place, not to mention other potential issues to be aware of.
, also unless 100% confident in what you are doing you could end up bricking the ECU. Instagram @defender_ventures
Empire Tuning - Agent
Post #876795 7th Jan 2021 5:59am
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roel



Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

Netherlands 2003 Defender 90 Td5 PU Caledonian Blue
Bricking the ECU is not the biggest problem. Whistle

I would just increase the fueling step by step and see how it drives. If the engine goes bang you have to go a step back. Twisted Evil Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)
Post #876842 7th Jan 2021 12:23pm
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achuakh



Member Since: 12 Apr 2012
Location: Singapore
Posts: 158

Singapore 2002 Defender 90 Td5 SW Oslo Blue
in a nutshell, but there are many steps in between these

1. take the car for a drive.
2. use the nanocom to get the log of the max airflow, should happen around 2.5 to at most 3k rpm
3. calculate the ARF using the amount of airflow
4. as you move up the table you will realise that you need to extend the amount of mg of fuel needed to keep the ARF decent
5. you will need to calculate the injector PWM to find out the duration of how much time to open the injector to give you the desired mg of fuel.
6. do that for all 4 PWM tables
7. modify the "smoke limit" table to take care of the additional fuel map table you have. on the EU3 motor, there's one for light loads and there's one for "normal" use.
8. now that you have that, you will also need to make sure you take care of the boost, so you need to modify the target boost

it's a nice and fun exercise where you get to change you map as and when you want and try out new things. However, if this is not your idea of fun, just pay someone to map it for you. From the land of the most expensive land rover defenders on planet earth. At �125k for a XS 110 csw and you get to own it only for 10yrs! Please find me a good reason to stay on this island.
Post #877404 10th Jan 2021 9:14am
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petersbert



Member Since: 29 Dec 2020
Location: heeswijk
Posts: 4

Netherlands 2002 Defender 110 Td5 USW Barolo Black
Just the way I did it! Calculated airflow from MAP/IAT because MAF sensor got out of reache. Only issue is what is best AFR?
Now I run 15-16 AFR, not to low?
Post #878028 12th Jan 2021 5:15pm
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6093

United Kingdom 2006 Defender 110 Td5 SW Epsom Green
roel wrote:


If the engine goes bang you have to go a step back. Twisted Evil


Rolling with laughter Rolling with laughter Rolling with laughter

Bit like , if a bolt shears then back off half a turn....
Post #880135 22nd Jan 2021 12:56pm
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