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Thread: Motogadget M-Unit Blue

  1. #21
    Join Date
    Nov 2013
    Posts
    101

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    For once I'm ahead of schedule. I started the car this weekend and it is running great. Still lots of small stuff left to do before I take it for a drive. The M-Unit is working great. One silly-but-fun feature is Keyless Go. When my phone approaches the car the lights blink slowly. Then I can hit the started button once to power the ignition. Hit it again to start. Double-tap to kill the engine. Another double-tap (or walk away) to kill the ignition.

    One cool thing that I've learned is that Autometer publishes the calibration of their senders. Very convenient when you need to tell your ECU how to convert Ohm or volts to temp or pressure.

    I went ahead and ordered a wireless steering wheel controls from Cartek. I tried to use a cable, but it just won't work smoothly in the space we have. The Cartek controls are very slick and will let me keep my dash super simple. That will probably lead to me reworking the entire electrical panel layout since I need to fit in one more black box.

    The bad news is that my AT Power dry sump pump is leaking. This thing has been a nightmare for years. There really isn't enough space for the external pump so you can't get the fittings tight. I may have to replace it with the Raceline dry sump with an internal pump. Really don't want to have to take it apart again, so hopefully I can get the leak stopped.

  2. #22
    Join Date
    Nov 2013
    Posts
    101

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    Everything is wired up and working. I have one steering wheel button open, which I'll probably use to start the video camera at track days. https://youtu.be/nOojEHapl8o

  3. #23
    Join Date
    Sep 2020
    Location
    Kelowna BC
    Posts
    36

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    Wow! Impressed. That’s a slick set up.

  4. #24
    Join Date
    Apr 2018
    Location
    Ft Lauderdale
    Posts
    212

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    The M unit looks like a great upgrade and that is definitely under consideration after your write up but I don't have the funds so...
    I did however spring for a wheel control upgrade, and after looking at Cartek and Summit Raptor (both were a little pricy)

    I came across a NRG product at Vivid Racing that would seem to cover all the bases at a much lower cost over the other two, (with $20 coupon came out to 340 bucks)

    https://www.vividracing.com/index.ph...ontroller+Unit

    The Relays are mechanical opposed to solid State as in the Raptor Pro (not sure what the cartek specs are) but I do not see that as an issue.

    In addition does not look like it comes with the button stickers again not a deal breaker as the price is close to 50% less that the alternative

    This unit fits a 6 hole wheel so I called NRG tech at NRG and they said this should fit a MoMo 3 hole wheel if not I guess a i need to get out the drill.
    Life Can Be Cruel

  5. #25
    Join Date
    Nov 2013
    Posts
    101

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    @Brightonuk The NRG wheel controls look good. Definitely a nice price! Share pictures when you get it in. Cartek is very similar to Raptor. To me the advantage of Cartek is that they build a lot of racecar electronics, so they are used to making things last in harsh environments. I wasn't as confident in the Raptor longevity.

  6. #26
    Join Date
    Feb 2010
    Posts
    59

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    Jefferson - great to hear about your progress! I'd love to see your final wiring diagram if you have a chance. I'm curious how many traditional relays you needed to add, outside those catered for by the M-Unit.

  7. #27
    Join Date
    Nov 2013
    Posts
    101

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    @Ferrino - I only added 2 relays. One for the fan and a second that powers a fuse box when the ignition is on. Things like the AIM dash, ECU, sensors, wipers, etc all come off of that. I almost certainly could have skipped that one and just powered the fuse panel straight from the M-Unit.

    The final wiring diagram matches what I posted. It all worked out as expected. There are a few things that aren't on the diagram, like power to various sensors. I'm still deciding whether to add lights to the dash that show ECU codes, ignition on, fan on, EWP on and things like that.

  8. #28
    Join Date
    Apr 2018
    Location
    Ft Lauderdale
    Posts
    212

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    Slight Snag with the NRG or any wheel button unit

    I have a MoMo Mod 260mm wheel with no center hole, the unit needs a 48mm mounting hole for the electronics so:

    I have to figure out the center of the wheel I am using the 3 mounting holes as the basis.

    To find the centroid of any triangle, construct line segments from the vertices of the interior angles of the triangle to the midpoints of their opposite sides.
    These line segments are the medians. Their intersection is the centroid.

    OK got that bit after looking at 3 Youtube videos (Should of paid attention in school)

    And hopefully within that area I have room for for a 48mm hole

    Jeff What wheel are you using
    Life Can Be Cruel

  9. #29
    Join Date
    Feb 2010
    Posts
    59

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    Quote Originally Posted by JeffersonRaley View Post
    @Ferrino - I only added 2 relays. One for the fan and a second that powers a fuse box when the ignition is on. Things like the AIM dash, ECU, sensors, wipers, etc all come off of that. I almost certainly could have skipped that one and just powered the fuse panel straight from the M-Unit.

    The final wiring diagram matches what I posted. It all worked out as expected. There are a few things that aren't on the diagram, like power to various sensors. I'm still deciding whether to add lights to the dash that show ECU codes, ignition on, fan on, EWP on and things like that.
    Thanks. If you moved your coolant fan to a separate relay, what did you end up using the AUX2 output for? Water pump?

    Does your Cartek module work with the "park" function on your wipers?

    Where are your injectors and ignition coils getting power from?

  10. #30
    Join Date
    Nov 2013
    Posts
    101

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    @Ferrino - Yes, the Aux2 controls the EWP. I could probably have run both the fan and EWP off of it, but I really want the EWP to come on much earlier. Right now I'm not running a thermostat, with the theory that the EWP will basically act as a thermostat by coming on as the engine heats up. I actually don't even have a thermostat housing at the moment because of the water rail and blanking plates I'm using.

    Yes, the Cartek works with the park function. Basically there are 3 + wires coming out of the wiper motor. One gets power all of the time, and that it what enables parking. The other two are for low and hi speed. So I just have a latching button for low and another for high. The only slightly weird thing is that you can have low and high on at the same time. That actually works fine, but then you have to turn both off to stop the wipers.

    New Raceline dry sump is here! So this weekend I'll install it. With the right luck, the car might run again this weekend. More likely I'll need some fittings or something.

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