Inlet air Temperature

Discussion in 'Inboards' started by anthony goodson, Jul 11, 2020.

  1. Eric ruttan
    Joined: Jul 2018
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    Location: usa

    Eric ruttan Senior Member

    Ya, but no. Like all thats true, but it also a lot of maybe. All of those 'perhaps's go to zero with squirting water into the intake, which is cheaper and better in all ways than changing the intercooler.
     
  2. anthony goodson
    Joined: Mar 2007
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    Location: Dorset UK & Murcia Spain

    anthony goodson Senior Member

    Thankyou Eric for your input , I will look out for developments in this technology,with interest, however I tend to be a bit conservative in these matters ,probably my age, and baekmo is not normally associated with "maybe".
     
  3. BlueBell
    Joined: May 2017
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    Location: Victoria BC Canada

    BlueBell Ahhhhh...

    There are no developments in water injection technology.
    Don't confuse marketing for technological advancement.
     
  4. baeckmo
    Joined: Jun 2009
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    Location: Sweden

    baeckmo Hydrodynamics

    Please allow me to slide a bit out of topic; you have an interesting setup there, Anthony. The question about how to deal with the electronics of a common rail diesel when transferring it into a boat is intriguing. I'd like to know how you did it, are you using the original harness, what car-related computer inputs can be blocked aso.
     
  5. anthony goodson
    Joined: Mar 2007
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    Location: Dorset UK & Murcia Spain

    anthony goodson Senior Member

    Hi baekmo. Marinising this engine was a bit of a learning curve back in 2016 I asked for some advice on here as I knew very little about electronic diesels ,the replies were helpful but there was no specific information forthcoming,I thought I had found a company that could provide a plug and play loom but this was a dead end. The local BMW dealer laughed and said it couldn't be done I wouldnt be able to bypass their security I bought Rover 75 diesel car which was powered by a BMW M47R common rai diesel engine and was an mot failure and removed the engine ,I chose this M47R model for two reasons ,one because there is a lot of clearance around the exhaust manifold ,unlike the VW where it is difficult to fabricate a manifold ,and two because it has a conventional wastegated turbo,not an electronic one like the one in the BMW vehicles
    I know very little about electronics ,but it occured to me that if you didn't tell it it was in a boat ,and all the wires were in the right place it would work as normal. The electronics on this engine are quite sophisticated .There is a dedicated electronic chip in the key fob which when inserted into ignition barrel is surrounded by a coil,when energised this sends a signal to an immobiliser box in the form of a rolling code ie it changes each time it is activated,if this code is correct,and this is set by BMW at the factory,then a signal is sent to the engine ECU which in turn checks all the engine sensors camshaft/crankshaft positions etc ,if all is well the ECU earths the fuel pump relay and if the fuel pump pressure is ok the engine will start. All of these components, chip ,immobiliser, ecu ,must be a matched set from the same vehicle. Once I understood this ,it was relatively simple I searched the internet for the wiring diagram for the car ,and simply put all the wires in the right place. I condensed the wiring onto a board which lives in a box in the engine compartment it is then just a matter of plugging in the injector loom and the sensor wiring from the engine 5 plugs into the top of the ecu altogether. I have uploaded pictures of the front and back of this box ,which is simply plug and play. All the original sensors remain on the engine . The large metal box is the engine ecu the white plastic box is the immobiliser and the key is visible in the ignition barrel. You may notice an OBD reader in the picture ,this is connected to the K lines from the ews and ecu and gives me a wireless bluetooth dashboard as well as any fault codes from the ecu, using a nexus tablet and torque pro. Every wire and relay on that board are needed in order for it to run The original fly by wire throttle plugged into the ecu is used, extended up to the helm. So far the engine has performed well and been reliable the fuel consumption is beyond all my expectations. The engine as fitted to the vehicle was 130 hp but was easily chipped to 160hp.
     

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    Last edited: Jul 28, 2020
  6. baeckmo
    Joined: Jun 2009
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    Location: Sweden

    baeckmo Hydrodynamics

    Thanx for the effort, that straightened a couple of question marks!
     
  7. Magnus W
    Joined: Nov 2017
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    Location: Sweden

    Magnus W Senior Member

    There's a lot of good info on marinised BMW diesels in particular on the Swedish forum boatlife.se. As you might suspect it's in Swedish but I'm positive the knowledgeable members will share info in English if asked.

    While not educated on the topic I'd say that 100 cg intake temp is on the hotter side (my own FPT runs at 27 cg at 100 percent with 20/20 cg ambient air/sea water temp). I know from other engines that large temp span, especially in combination with rapid changes, is a serious cause of stress which can lead to premature failure. Empirical evidence suggests that proper operation is way more crucial with such engines.
     

  8. anthony goodson
    Joined: Mar 2007
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    Location: Dorset UK & Murcia Spain

    anthony goodson Senior Member

    Many thanks for that Magnus
     
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