Welcome to Our Community

Wanting to join the rest of our members? Feel free to sign up today.

Sign Up

EHC replacement

Discussion in 'Technical' started by Axel, Jan 20, 2016.

  1. Todd W

    Todd W New Member

    Joined:
    Jan 14, 2018
    Messages:
    13
    Likes Received:
    3
    Trophy Points:
    3
    Location:
    Frankfort In
    My Bike(s):
    03 chopper
    First Name:
    Todd
    what about the external relay on the old board?? Did you make it an internal ??
    20180218_081017.jpg
     
  2. Axel

    Axel Member

    Joined:
    Jan 20, 2016
    Messages:
    184
    Likes Received:
    412
    Trophy Points:
    63
    Location:
    Germany
    My Bike(s):
    2 x Shovelhead (old iron) and 1 Ridgeback 05 :-)
    First Name:
    Axel
    Hi Todd,

    Wow, nice bike :) The pics have put a big smile in my face. I like the exhaust style. I still have the boring original exhaust at my bike. However I just paid some bucks to an airbrush guy and my wallet is a bit empty due to 65 hours, what the airbrush guy got paid. So, a better exhaust will follow in the next winter...

    The external relay is now an internal highside switch, what is a bit better for long term operation (if the test device will work...). So, there is no need for an external relay anymore.

    I also thank you for testing the EHC. It´s just a prototype and let´s see, what happen.

    All the best!
    Axel
     
    dentdude36 likes this.
  3. Todd W

    Todd W New Member

    Joined:
    Jan 14, 2018
    Messages:
    13
    Likes Received:
    3
    Trophy Points:
    3
    Location:
    Frankfort In
    My Bike(s):
    03 chopper
    First Name:
    Todd
    Great, I am glad to be the test rat :)
    I am a industrial maintenance tech for 30 years now and have a good understanding of electronics and will be somewhat knowlegable to anything you need help on for test purposes :) Again, excited to help out :)
     
    dentdude36 likes this.
  4. Todd W

    Todd W New Member

    Joined:
    Jan 14, 2018
    Messages:
    13
    Likes Received:
    3
    Trophy Points:
    3
    Location:
    Frankfort In
    My Bike(s):
    03 chopper
    First Name:
    Todd
    Very Knowlegable and So helpful :)
     
  5. Axel

    Axel Member

    Joined:
    Jan 20, 2016
    Messages:
    184
    Likes Received:
    412
    Trophy Points:
    63
    Location:
    Germany
    My Bike(s):
    2 x Shovelhead (old iron) and 1 Ridgeback 05 :-)
    First Name:
    Axel
    Hi Kevin and Todd,

    Thanks for the flowers :) Here are a lot of great persons in this community, who are helpful with their infos and suggestions. I got many good infos about BDM bikes, when I started with the EHC project. I have to thank you all !!!

    About knowlegable: it´s still a prototype and I hope that your bike will not burn down, while tesing the EHC ;-)

    ...and beside of it I love these bikes :)

    All the best!
    Axel
     
    pknowles likes this.
  6. Gmutoagrsv

    Gmutoagrsv Active Member

    Joined:
    Jul 29, 2017
    Messages:
    251
    Likes Received:
    88
    Trophy Points:
    28
    Location:
    Reno nv
    My Bike(s):
    2006 mastiff
    First Name:
    Greg
    Crap. Not you have me wondering. I’ll have to check again.
    lol. It is a 06. My mistake. I don’t even know what I’m saying anymore.
     
  7. Axel

    Axel Member

    Joined:
    Jan 20, 2016
    Messages:
    184
    Likes Received:
    412
    Trophy Points:
    63
    Location:
    Germany
    My Bike(s):
    2 x Shovelhead (old iron) and 1 Ridgeback 05 :-)
    First Name:
    Axel
    Sorry guys for the late reply. I was the last 2 months busy with production and service, cause everybody here wanted to bring his bike on the road after the winter and I was hanging in my workshop and had assembled and tested electronicboxes and other toys and had absolutely no time for internet.

    However, the EHC03 is ready. I had sended one of the first samples to Curtis almost 2 months ago and I got the response, that the box works fine. I have finish a tester and 25 EHC03 boards last week and will pot and test a few 03 EHC within the next days. Here is a pic of the tester and one of the boards:

    EHC03 Tester.jpg
    However, I had "build in" 4 mistakes in the board layout of the tester, when I made the pcb layout. This had cost me a few hours to find out the issues and solve it. Sometimes it is not the computer, what ist stupid. It´s the guy in front of the keyboard :-/

    By the way, when I talk about stupid: I got airbrush on my bike within the winter. 3 weeks ago I assembled the parts together and had put the seat on the bike. This was the result :-(

    bd.jpg

    I have decided to cut my seat after I recovered from the shock and brought it to a leather guy, who have covered it new. Now is everything "under control" and my seat is much smaller, more flat and in a friendly looking black leather :) I had ride 250 km last weekend and there was no need to recover from it :)

    I come back with the next infos, when I have finish some 03 EHC.

    All the best!
    Axel
     
    pknowles, dentdude36, Milco and 4 others like this.
  8. Hirter6Pack

    Hirter6Pack Not Quite A Guru
    Supporting Member

    Joined:
    Oct 31, 2015
    Messages:
    2,341
    Likes Received:
    5,048
    Trophy Points:
    113
    Location:
    Saint Joseph Mo
    My Bike(s):
    2004 Mastiff
    First Name:
    Rick
    Great job on the 03s Axel.
    As for the airbrushing,some might say she is the perfect woman just as it is.:)
    Keep up the good work :old2:
     
    pknowles likes this.
  9. Todd W

    Todd W New Member

    Joined:
    Jan 14, 2018
    Messages:
    13
    Likes Received:
    3
    Trophy Points:
    3
    Location:
    Frankfort In
    My Bike(s):
    03 chopper
    First Name:
    Todd
    That is Great news and we appreciate all the hours you put into this. Can' wait to try one out :) Awesome Airbrushing job as well :) Rode today in 50degree weather Indiana and had a blast :)
     
  10. No H2O

    No H2O Active Member
    Supporting Member

    Joined:
    Aug 9, 2017
    Messages:
    227
    Likes Received:
    126
    Trophy Points:
    43
    Location:
    DC
    My Bike(s):
    2004 Ridgeback, 2004 BMW R1150r, 2001 Fat Boy
    First Name:
    Mark
    omg I grew up 3 hours away from you in Coesfeld
     
  11. Axel

    Axel Member

    Joined:
    Jan 20, 2016
    Messages:
    184
    Likes Received:
    412
    Trophy Points:
    63
    Location:
    Germany
    My Bike(s):
    2 x Shovelhead (old iron) and 1 Ridgeback 05 :-)
    First Name:
    Axel
    Hi Rick,
    Hahaha, Yes, you are right in many cases :) :) :)

    Hi Tommy,
    Yes, this is not ver far from my place. Have fun :)

    Hi Todd,
    Yes, I also looking foreward to get the first devices out for test it on the road. A workshop or a bike in the workshop are not the real life. but I have a good feeling. Let´s see...

    All the best!
    Axel
     
    Hirter6Pack likes this.
  12. Todd W

    Todd W New Member

    Joined:
    Jan 14, 2018
    Messages:
    13
    Likes Received:
    3
    Trophy Points:
    3
    Location:
    Frankfort In
    My Bike(s):
    03 chopper
    First Name:
    Todd
    Axel, My one question is where is the headlight relay on your board ?? I dont see it. There is no compression relief on the 03 so it really isn' needed, did you bypass this internally ??
     
  13. Axel

    Axel Member

    Joined:
    Jan 20, 2016
    Messages:
    184
    Likes Received:
    412
    Trophy Points:
    63
    Location:
    Germany
    My Bike(s):
    2 x Shovelhead (old iron) and 1 Ridgeback 05 :-)
    First Name:
    Axel
    Hi Todd,

    Thanks for the comment. Yes, I have put a 2 channel high side switch on the board, what replaces the "traditional" bulky relay. I believe, this a bit more modern compare to the old mechanical relay, what can (and will...) make trouble after a time. I think the time for mechanical relays in a bike should be a matter of past.

    About the compression relieve valves: You are right. There is no need for taking care of decompression valves.

    Big Dog had use an extra "start module" in the 2003, what take care for driving the starter solenoid and the ignition. I haven´t see it yet, but I think it contains just 1- 2 relays and maximum 3-4 additional parts. My EHC 03 just drive the starter module with 12 Volt. I have implemented a 20 Ampere high side swtch just in case. This high side switch can drive the starter solenoid direct without the starter module. So, there is basically no need for the starter / ignitiojn module if the ignition switch can handle the current for the rest of the bike but I haven´t the opportunity to try it out in a bike yet. I think, it´s a good opportunity to test it. Here is the 2003 schema, where you can see the starter module as well:
    2003_EHC_1.JPG
    Does anybody had open a starter module already and have checked what is inside? What is the maximum rated current of the 2003 ignitiojn switch?

    Alll the best!
    Axel
     
    pknowles likes this.
  14. Axel

    Axel Member

    Joined:
    Jan 20, 2016
    Messages:
    184
    Likes Received:
    412
    Trophy Points:
    63
    Location:
    Germany
    My Bike(s):
    2 x Shovelhead (old iron) and 1 Ridgeback 05 :-)
    First Name:
    Axel
    Last weekend I was a bit out with my bike and had a bit trouble with the original ignition, what stopped to work when it was warm. After a few minutes cooling down I was able to start my Ridgeback again for the next 2 kilometers until the ignition stopped again. The end of the story was that I called a friend, who picked me up with a trailer :-/

    I already checked the crank sensor and my EHC, what work both fine. I still have my own app controlled ignition not ready yet but I had luck and got a Thunderheard ignition from Dragan, the Swedish Big Dog importeur, what I want to put in my bike tomorrow. This ignition have a 16 way switch and I can adjust with it the pre angle of the spark time what should bring more power and better performance. I wonder if anybody knows, what curve would be the best solution for a 2 liter S&S engine? I attach the curves.

    Thanks a lot in advance!

    All the best!
    Axel
     

    Attached Files:

  15. Rottweiler

    Rottweiler Active Member
    Supporting Member

    Joined:
    Sep 8, 2013
    Messages:
    978
    Likes Received:
    1,282
    Trophy Points:
    93
    Location:
    Elizabethtown, PA.
    My Bike(s):
    2004 Chopper, 2014 HD Road King CVO, 1985 FXWG
    First Name:
    Todd
    Sorry Axel,
    My 2004 has the old nose cone pickup. Hopefully some else with info. on this will chime in soon.
     
  16. BWG56

    BWG56 Guru

    Joined:
    Jul 29, 2008
    Messages:
    21,039
    Likes Received:
    37,067
    Trophy Points:
    113
    Location:
    USA
    My Bike(s):
    Big Dog, SpyderF3
    First Name:
    Ker
    Stock timing I believe is 30*BTC which is setting 3 keeping the original stock RPM.
    I've tried setting 2 and 4 and I didn't notice any seat of the pants difference, dyno tune I'm sure would prove different.

    "Ok, i am a research nut! I called S&S, and Bob Wood, and come up with the same answer on timing. They both say that 30-32 degrees of advance is what makes these motors run the best. So on the Thunder Heart, setting the box at the 3 or 4 setting should give you the best overall performance. You can go to 5 if you have good gas and live in a low altitude location.


    Setting 3 is 30 degrees


    Setting 4 is 32 degrees
    Setting 5 is 34 degrees
    Setting 6 is 36 degreesI was told by the local BDM dealer that with stock compression to be no more that about 30 degrees. I ran mine at 30 and 32 and I am staying at 32 for now until the gas goes to shit!
     
    #656 BWG56, Aug 11, 2018
    Last edited: Aug 11, 2018
    cdogg556, Axel, pknowles and 2 others like this.
  17. Axel

    Axel Member

    Joined:
    Jan 20, 2016
    Messages:
    184
    Likes Received:
    412
    Trophy Points:
    63
    Location:
    Germany
    My Bike(s):
    2 x Shovelhead (old iron) and 1 Ridgeback 05 :-)
    First Name:
    Axel
    Hi Ker,

    Great, thanks a lot for your answer :) This helps a lot ! I´ll try it out later today.

    All the best!
    Axel
     
    BWG56 likes this.
  18. SKOGDOG

    SKOGDOG One of the old ones.
    Supporting Member

    Joined:
    Sep 21, 2009
    Messages:
    1,504
    Likes Received:
    2,410
    Trophy Points:
    113
    Location:
    Pittsburg, Kansas
    My Bike(s):
    2008 K9-2010 Bulldog Bagger
    First Name:
    Rick
    Hi Axel,
    Thanks for this project.We are fortunate to have a skilled member who has taken an interest in solving a problem as significant as the EHC in Big Dogs. Yours is one of the more powerful contributions to our community, and I sure hope to get a chance to meet you someday, maybe at the next Gathering in Flint Oaks in June.
    I put a Thunderheart in my 2008 K9 a few years ago and it performed much stronger. I recall originally setting it to fire at 32 degrees before top dead center. A skilled mechanic suggested that could be harder on the engine as a permanent setting, so I changed it to 30.
     
    Srodden, Rottweiler and cdogg556 like this.
  19. Axel

    Axel Member

    Joined:
    Jan 20, 2016
    Messages:
    184
    Likes Received:
    412
    Trophy Points:
    63
    Location:
    Germany
    My Bike(s):
    2 x Shovelhead (old iron) and 1 Ridgeback 05 :-)
    First Name:
    Axel
    Hi Rick,

    Thanks for the info. I have changed and tested the Thunderheard ignition today. Yes, I absolue agree that the power of the bike is much stronger compare to the original ignition. I have tested it a short time with 30 and 32 degree but have not found a difference.

    However, unfortunately the issue is still the same. The ignition stop to work after some minutes and I can start it again after a bit cooling down. I have checked the spark plugs and have seen the front cylinder spark plug was almost black and a bit wet. The rear spark plug was brown and dry. So, I think it should be the coil or the front spark plug cable or the spark plug, what makes the trouble. The cable looks fine. The sparks looks ok when I put the spark plugs outside of the cylinders and turn the engine but I can of course not check the spark plugs when they are build in.

    What is your opinion from the far? Should I change the spark plug or the coil? Could the spark plug make this issue after a few minutes when it get warm?

    Thanks a lot!

    All the best!
    Axel
     
  20. Kiwirider

    Kiwirider Active Member

    Joined:
    Sep 1, 2011
    Messages:
    264
    Likes Received:
    31
    Trophy Points:
    28
    Location:
    Van Buren, MO
    My Bike(s):
    08 Mastiff
    First Name:
    Dean
    Hi Axel. Yea one of them was myself. My concern was that if riding and you had for example some sort of stuck throttle or runaway bike, you couldnt cut power to the engine at the hand control (While still keeping two hands on the controls), instead having to go to the key as the only option to kill the engine. As it was, hitting the off button would kill it, but it would re energize and probably restart the engine after the 2 sec pause.
    Can my model be updated with the new changes? EHC07/08 EFI/05-08 Carb 000-00000-85 ?
     
    #660 Kiwirider, Aug 12, 2018
    Last edited: Aug 12, 2018

Share This Page