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bradsm87

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Posts posted by bradsm87

  1. ECU between Fury and Thunder

    in WishList

    Posted

    3 hours ago, mapper said:

    Disagree, Link already has a whole bench of different wire in ECU's, like no other manufacturer. Price diff is not that biig between Furry and Thunder to add another one. 

    2x DBW and only 1x Lambda does not make sense in most applications. 

    Thats my oppinion.

    DBW outputs are also for electronic wastegates and DBW throttles as blow off valves these days so the uses are a lot more than just primary throttles. People can always add one CAN lambda if they want dual wideband.

  2. ECU between Fury and Thunder

    in WishList

    Posted

    It'd be great to see an ECU between the Fury and Thunder that's smaller and cheaper than the Thunder.

    2x 34-bin and 1x 26-pin
    8 ignition
    8 injector
    2x e-throttle (one more than Fury). High amperage support for futureproofing for electronic wastegates etc.
    Single wideband like Fury
    More I/O than Fury but less than Thunder

  3. Fury or thunder X

    in G4x

    Posted

    22 minutes ago, Simon said:

    If you can wait 1-2 days I can confirm they are in the NZ building now and going through burn in testing and will be shipping to the global warehouses soon after. 

    Yeah that's fine. Can do. It was just hard to know if this 2 or 3 weeks is different to every other 2 or 3 weeks I've heard so if there is progress and it's not just the same no ETA from the manufacturer, then that's great news. Cheers!

  4. Fury or thunder X

    in G4x

    Posted

    On 6/25/2020 at 8:35 AM, Adamw said:

    I chased engineering last night to get a feel for what the delay was.  Most of the other G4X's ECU's we had quite a large stock of prior to all the covid stuff, but the Fury was just entering production at the start of it all.  The long shut down of most of the major electronics manufactures  (mostly China) and the consequent stockpiling that many of the large manufacturers done has caused worldwide extinction of several needed electronic components and a massive backlog for the component producers.  At the moment we are waiting in the cue like everyone else with no firm ETA sorry.  

    I'm bowing out of the Link wait now sadly.

    You really should consider switching to a manufacturer who can at least give you an ETA and regular updates if the ETA changes. The COVID excuse can only be pulled so many times. Every time I've called Link in the past 4 months, I've been told either 2 weeks or 3 weeks. After last time 2 weeks ago being told 2 weeks and today now it's 3 weeks from now, what will it be when I call in 3 weeks? 2 weeks again or maybe 3 weeks that time? The time after that etc etc.

  5. Interpolate, factoring in axis cell values

    in WishList

    Posted

    4 hours ago, Vaughan said:

    Reasonably often a non linear axis wants linear data lined up against it such as tps as engine load or resistance to temperature, in these situations a linear interpolation taking into account axis values will result in incorrect or unhelpful values in the table.

    While it would be helpful in other situations to have it look scale the interpolation values with the axis the kind of axis that would want a scaled interpolation is often already setup with evenly spaced increments.

    I would argue that it's more useful to be able to make a linear interpolation across a non linear axis than to make an interpolation that is scaled to the axis.

    Thank you for the suggestion though.

    I agree for many situations . Why not have two separate options then?

    2 hours ago, Adamw said:

    Maybe Im understanding it wrong, but if you interpolated the table data using the same polynomial as a non linear axis had then wouldnt it effectively give you same result as having a linear axis with linear interpolation?  So in other words exactly the same as just keeping the first and last axis value and deleting all breakpoints in-between?

    As an example if I interpolated this table from the far left cell to the far right cell using the same curve as the axis, then it would give me the result below.  I would get exactly the same control output from the table if I deleted the 5 & 20 columns.

    m4lu8Rg.png

    But often on 3d tables you will want to interpolate some but not all rows or columns and still have the resolution to make changes in other areas. One example where I would have liked it for a starting point was is the E-Throttle target table to be able to make a non-linear curve with finer resolution in the bottom 15%, not a lot of resolution around the middle where it's quite straight and linear, and finer adjustment again near the top end but if I want to use the interpolate function, I'm kinda forced to have a linear Y axis.

  6. Nissan optical never as fast to start on aftermarket ECU?

    in G4x

    Posted

    5 hours ago, Vaughan said:

    With the 360 opto mode in G4X it looks at the ignition mode and the number of cylinders to determine the trigger 2 tooth pattern so I would recommend against changing between distributor and non distributor disks if you are not changing your ignition system too. The G4X should sync faster than the G4+ but you still require enough crank etc enrichment to make it fire quickly.

    If you do change the trigger disc without changing the ignition system you can use the 360 opto widest slot mode but this mode will not sync as quickly as the regular 360 opto mode.

    Yeah I definitely won't be changing the wheel if it's already got the good one. I'll only change it if it's like in the picture but I suspect the picture is wrong..

  8. Nissan optical never as fast to start on aftermarket ECU?

    in G4x

    Posted

    So my TB48 Nissan optical CAS is as per the attached pic. I know that the factory ECU never shuts down. All fuel trims, idle learning etc is stored in RAM. I've noticed that people with aftermarket ECUs never have it crank and start as quick as the factory ECU.

    My theory is that the factory ECU stores which cylinder it is up to in RAM all the time. It does often take longer to turn over if the battery has been disconnected which supports this theory. Aftermarket ECUs power off when you turn ign off or shortly after so it would be impossible for an aftermarket ECU to know which cylinder it is up to when starting the vehicle. Is that fair to say?

    If I swap to a CAS wheel where each of the 6 slots all have a different length, will a G4X be able to start the car without needing to go all the way around to the home slot?

    CAS.JPG

  10. Why is e-throttle relay control needed

    in G4x

    Posted

    1 hour ago, TechDave said:


    It does that a well.

    This is a safety requirement we strongly recommend you do not compromise on.

    OK thanks. The FuryX may not be for me after all as I'd run out of outputs. I'll have a think about XtremeX + CAN Lambda but that kinda kills the budget.

  15. Is G4X closed loop lambda suitable for WOT?

    in G4x

    Posted

    Is CLL in "Auto Mode (Wideband)" suitable for full load operation? There are lockout settings that are set up to lock it out at full load but do I have to lock it out? Many factory and aftermarket ECUs work well with closed loop wideband under all load conditions including WOT.

  16. Generic parameter maps

    in WishList

    Posted

    On 5/15/2020 at 12:33 PM, Adamw said:

    It can be done in the G4X presently with GP PWM's (still need to assign an ouput pin at present tho) and will likely get some sort of "PWM virtual aux" functionality added soon.  Unfortunately unlikely in G4+ due to constraints in the firmware.

    Can this be done now with the new firmware by doing a GP PWM out and assigning it to one of the "CAN Aux" channels and simply not using any actual CAN aux devices?

  18. Generic 3d table for switched output

    in G4x

    Posted

    14 hours ago, TechDave said:

    Our GP Output style of control for the GP PWM functions combined with a non interpolated table with only on/off state would do this.

    Weirdly Adam and I were discussing this type of function last week, I added it to our issue tracker probably the same day as your OP.

    How would non-interpolated work when you have for example?:

             1000    2000
    40        0          1
    80        1          1

    Would the "cutoff line" follow straight between those diagonal cells? Would 60kpa at 1500rpm be 1 because that's what I would need?

  20. Long Term (Stored) Fuel Trims

    in WishList

    Posted

    I know with a perfect tune, short term fuel trims alone are fine, BUT, we don't always pick up issues immediately like a failing fuel pump or blocked fuel filter without a fuel pressure sensor present. I'm sure there are many other cases where the tune gets thrown out. a LTFT table would not only be great for better fuel control in such cases, but also a great table to regularly check up on and either 1) integrate any small changes into the main fuel table or 2) quickly identify an issue.

    What are the chances of adding this to the G4X to-do list?

  21. Generic 3d table for switched output

    in G4x

    Posted

    After a bit more playing with this, can I request that you consider implementing a dedicated "cam switch" feature? This could apply to Nissan VTC on SR20s and TB48s as well as Honda VTEC, Toyota VVTL-i etc etc. It would be nice to have setpoint setup with the same (or more) control as the arrangement screenshotted in the first post as well as user definable lockouts (eg. don't engage below X speed, X MAP)?

  24. Low range transfer case switch incorporated into gear detection

    in WishList

    Posted

    It would be great to see low range transfer case switch recognition and 2 separate sets of RPM/Speed gear detection gears. Without the gear detection knowing transfer case status, it could never be able to tell the difference between L3's 4.078:1 ratio compared to H1's 4.084:1 for example. I think a good way would be a new input/runtime for transfer case status as "low range" and "high range" that can be used anywhere on the ECU as needed plus the ability to have two sets of stored RPM/Speed gear detection ratios that are switched by the transfer case status switch.

    An easy way to start with might be to simply allow the addition of a Y axis on the gear ratio table so someone can add a switch status as a Y axis and set up the ratios for each.

  25. Generic 3d table for switched output

    in G4x

    Posted

    21 minutes ago, mapper said:

    I would try to use an Virtual Aux with on condition

    Aux pwm > 50% 

    And switch off time of 0.2sec or so

    This gives you a boolean including hysteresis. 

    I'd still need to enable a GP PWM output which occupies a real output pin to get the PWM value from. I need a GP output to apply the on/off to a real output anyway so what advantage would bringing a Virtual Aux in have?

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