R1100GS: Anyone w/ dual or twin headlight?

Discussion in 'GS Boxers' started by PaperBoy, Nov 13, 2009.

  1. PaperBoy

    PaperBoy Dig that Crazy Beak

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    Yes!

    Can't explain it myself, but did a Google search and this is from Daniel Stern Lighting Consultancy and Supply

    "WHY USE RELAYS? Power for the headlights is controlled by a switch on the dash. This is *not* a great place to tap into the system, for two reasons: The headlamp switch uses tiny, high-resistance contacts to complete circuits, and the wire lengths required to run from the battery to the dashboard and all the way out to the headlamps creates excessive resistive voltage drop, especially with the thin wires used in most factory installations.
    In many cases, the thin factory wires are inadequate even for the stock headlamp equipment. Headlamp bulb light output is severely compromised with decreased voltage. The drop in light output is not linear, it is exponential with the power 3.4. For example, let's consider a 9006 low beam bulb rated 1000 lumens at 12.8 Volts and plug in different voltages:
    10.5V : 510 lumens
    11.0V : 597 lumens
    11.5V : 695 lumens
    12.0V : 803 lumens
    12.5V : 923 lumens
    12.8V : 1000 lumens ←Rated output voltage
    13.0V : 1054 lumens
    13.5V : 1198 lumens
    14.0V : 1356 lumens ←Rated life voltage
    14.5V : 1528 lumens"

    With the harness and relays all the power is going to the bulb, and the original switch is only used to fire the relays as I understand things. The difference between the bulb getting only 10.5V and one getting the rated 12.8V is pretty substantial, nearly twice the lumens at 12.8V. You can read all about it here: http://www.danielsternlighting.com/tech/relays/relays.html
    #41
  2. Graminal95

    Graminal95 Adventurer

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    The mechanical is all complete except for a cover like the wunderlich one.

    [​IMG]
    #42
  3. RAL88

    RAL88 Marineboy

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    I am in the process modifying an old tt dual headlight systm with cbr 400 lights and HIDs. I will post pics as the project moves along.
    #43
  4. PaperBoy

    PaperBoy Dig that Crazy Beak

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    :clap Rich, that would be great!

    And I am looking forward to seeing the results. Also looking forward to what Graham comes up with as surrounds for his dual headlight project. They're looking good so far, did you take any pics of the build?

    I'm glad I revived this post -- this is turning into a great resource for information on making our R1100GS headlight better. Some like as is, and many say they're better than the 11-fifties, but I just couldn't stand the output of the (non-relayed) stocker on low beam on a dark and stormy night. Might have to ask moderator to change thread title from "R1100GS: Anyone w/ dual or twin headlight" to "What have you done to increase output from your R1100GS headlight?" There's lots of threads on adding auxiliary lighting, but improving, modifying, or converting the bus headlight is what I was looking for.
    #44
  5. twinrider

    twinrider pass the catnip

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    [​IMG]

    I had these TT dual headlights on my 1100GS years ago. They were disappointingly dim and when I changed the bulbs to ones with the same wattage but higher output, the plastic reflectors melted. I ended up putting the square headlight back in and upgrading the bulb with much better results. If I had the 11GS now I'd go HID on the stock headlight and add some LED driving lights.
    #45
  6. Graminal95

    Graminal95 Adventurer

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    I rode a little tonight with only one low beam as I'm waiting for the wiring to arrive. It is definetly better then stock. I have HID's I purchased for this project last year that I will be trying out as well. The nice thing about the 90mm Hella are that they are all glass and aluminum reflector, no plastic to melt and perfect for the highest wattage you can find.

    Here are a few more build photos. [​IMG]

    [​IMG]

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    [​IMG]
    #46
  7. Racegun

    Racegun Single Track Mind!

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    NICE work Gram!
    #47
  8. twinrider

    twinrider pass the catnip

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    A friend used similar lights on his XR400 with an HID conversion. Nice and bright.
    #48
  9. RAL88

    RAL88 Marineboy

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    Ok, here I am with mine.

    Cut off the tabs on the back of the light with my dremel. I ground down the back silver plate so the back of the lights would fit in. I then ground down the front black plate so they would fit in. Squeezed it all together and screwed it down.

    I put in my 35watt 6000k HID and bench tested it. I was skeptical about the HID being about 3 times brighter than a halogen but I have to say that it was freakin bright. I left it on for about 20 minutes to make sure there was no melting going on and everything seemed to be fine. I will have to wait until I get it mounted on the bike to see what the beam spread is but with two HIDs I think it will more than the single halogen or just replacing the one halogen with one HID.
    [​IMG]
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    [​IMG]
    #49
  10. PaperBoy

    PaperBoy Dig that Crazy Beak

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    These are looking great.
    #50
  11. Racegun

    Racegun Single Track Mind!

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    GOOD STUFF there Rich!!! THX!
    #51
  12. PaperBoy

    PaperBoy Dig that Crazy Beak

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    Rich, are you going to have one side high beam and the other low. Or are you using the bi-xenon that moves in and out for high and low? I know a third option is one where the bulb/capsule has both a xenon low and a skinny halogen high.
    #52
  13. RAL88

    RAL88 Marineboy

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    I am using bi-xenon so I can have low beams and high beams in both lights.
    #53
  14. Graminal95

    Graminal95 Adventurer

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    What do you guys think of the cover I'm going to make? It is a lot like the Wunderlich cover because it think it looks really good with the owl eyes.

    [​IMG]

    I'm also going to leave enough room behind the oil cooler guard so that I can install 2X 100mm fans for cooling if I decide its needed in the future.
    #54
  15. PaperBoy

    PaperBoy Dig that Crazy Beak

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    Can't wait to see it fitted.
    #55
  16. RAL88

    RAL88 Marineboy

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    So I got the HIDs mounted in the lights and tested them. The are really bright. Next is to mount it on the bike.
    [​IMG]
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    [​IMG]
    #56
  17. Graminal95

    Graminal95 Adventurer

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    The headlight cover is roughed out, but needs some sanding, epoxy, and paint. [​IMG]
    #57
  18. PaperBoy

    PaperBoy Dig that Crazy Beak

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    Looks professionally done. What did you form the headlight cover/surround from? Any photos of the process?
    #58
  19. Graminal95

    Graminal95 Adventurer

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    I used a cheap 3d printer and made them out of pla. They need to be finishe and painted, and a grill guard made up for the oil cooler. The headlights are awesome! So bright that speed limit signs are almost blinding.
    #59
  20. Graminal95

    Graminal95 Adventurer

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    Almost done. Just needs a little sanding, some clear, and a grill for the oil cooler. [​IMG]
    #60