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CharlesElliott

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Everything posted by CharlesElliott

  1. CharlesElliott
    I've only got a few seconds as about to leave for work but I see 280 in the link layer address type. Depending on how Wireshark is displaying the byte ordering, the relevant data element for RPM is byte 2 and 3 which on the face of it is 0....but maybe the car wasn't running. I will dig out my CAN dumps later - you really need something that will do a more readable first level of CAN decode.
  2. CharlesElliott
    Standard Caterham MBE ECU. It's a 1.6 Sigma for me but I don't think Caterham change the CAN config. It was pumping out one or two more channels but the data was always 0x0 or some other fixed value.
  3. CharlesElliott
    Yes, although I think I already did the work some months ago and posted the answers above
  4. CharlesElliott
    CAN config is locked and not readable on the Caterham ECU.
  5. CharlesElliott
  6. CharlesElliott
  7. CharlesElliott
    My ECU publishes on two channels: Engine RPM: CAN 0x280, start bit 16, length 16, unsigned, Intel Standard Byte Order, Scale 1, Offset 0 Water Temp: CAN 0x288, start bit 8, length 8, unsigned, Intel Standard Byte Order, Scale 1.75, Offset -30 (note there is some debate that Easimap actually has the wrong scaling for Water Temp and ends up about 10 deg out but the gauge is right....I've never spent the time checking, it's close enough) A CAN message payload is 8 bytes, as you can see, most of the message is not used (1 byte for water temp, two bytes for RPM). You need something that can usefully decode the bits in the hex data you are seeing, or write something in Excel to do it. Charles
  8. CharlesElliott
    I think you are just going to see RPM and Water Temp....if you are lucky. My DL1 data logger can sniff the CAN and decode it so I know everything that is there on mine. You can sniff what Easimap is sending and then replicate the request / response process to get the other parameters.
  9. CharlesElliott
    I'm pretty sure you can't dump the map from a Caterham ECU so it doesn't much matter what format the .ec2 file is in
  10. CharlesElliott
    A repeated request/response I believe. Here's one of the examples that uses this approach for TPS (I think): https://www.fastmateracing.com/
  11. CharlesElliott
    Also see my thread here: https://www.lotus7.club/forum/techtalk/what-canbus-data-can-be-logged-caterham-mbe-ecu
  12. CharlesElliott
    The ECU as supplied by Caterham publishes little or nothing on the CANbus - probably just RPM and water temperature. Caterham seem to have decided to configure it that way. The reason Easimap is needed and can get more data is because it sends a request to the ECU which the ECU then answers. There are a couple of companies who have created modules that continuously request the data so that something else listening on the CANbus can pick it up. On the PIN/encryption, I haven't investigated this but on the more recent ECUs I believe there is a custom version of Easimap that Caterham have and therefore it is no longer possible just to find out the PIN to get access. Charles
  13. CharlesElliott
    Are you sure it hasn’t protected the lacquer and now the lacquer is an uneven shine? I’ve removed stickers from race cars countless times and have never found any glue that can resist brake cleaner or petrol (although those just end up spreading it into a sticky mess).
  14. CharlesElliott
    See my post here: https://www.lotus7.club/forum/techtalk/k-series-oil-pressure-data-logging-race-car-rebooted-new-forum
  15. CharlesElliott
    See page 8: http://pdf.directindustry.com/pdf/henkel-loctite/product-selector/5610-238310.html Probably Loctite 270.
  16. CharlesElliott
    I have a Spa centre mirror in used condition......if you are interested?
  17. CharlesElliott
    When our race series brought in a class with the aluminium VVC intake, we started having TPS failures regularly. It was improved with a more flexible wiring sub-loom and a thin rubber gasket between the TPS and the plenum. Vibration was the killer as you suggest.
  18. CharlesElliott
    It seems a bit too good to be true, so will be interested in the results. £200 is quite a lot though, how much to paint two wings in normal paint?
  19. CharlesElliott
    Generally, when a plain washer is used under a spring washer it is to prevent damage to the surface.
  20. CharlesElliott
    Re: the steering play. The only UJ I'm aware of is the one near the rack - as it is splined there shouldn't be play. The normal areas for play are the collapsible joint near the top of the steering column, or the splines on the wheel / boss if you have a removable steering wheel. You can't fix the latter unless you buy a different type of removable wheel.
  21. CharlesElliott
    The steel is hard, make sure you have decent drills!
  22. CharlesElliott
    I would agree that you should hold off and progress the build. But one more question......when you turn on the ignition, do you get a full range deflection from the instruments (or at least water temp and oil pressure)? If not, there is another electrical issue there.
  23. CharlesElliott
    I'm not sure I can give a good reason but this really doesn't sound like a good idea to me and it feels likely that the incomplete build is the cause of the issue. If you proceed, have you checked all the fuses? There seems a reasonable probability that a dangling connector could have shorted something out. Is the ECU connected properly and plugged in?
  24. CharlesElliott
    Bad earth? Does everything else work - dash lights, headlights, rear lights etc.? Any strange electrical behaviour?
  25. CharlesElliott
    Quick question as I’m away from the car.....can someone confirm if these are M6 or M8?
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