Ural Snorkle mod

Discussion in 'Hacks' started by Hotmamaandme, Jun 11, 2008.

  1. Hotmamaandme

    Hotmamaandme Wishing I was riding RTW

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    http://www.advrider.com/forums/showthread.php?t=331430


    Air box snorkle

    Ok I did some brain storming and dont laugh this is what I came up with. In 15 min with a $20 investment and no permanent mods reults are as follows. I dont have skills or time to make my my own custom air box like Mr. Cob and the others.

    So I did this, I ran a 2.5 inch shop vac hose from the air hole in the bottom of the stock air box and ran it out to the front of the bike. My "Theory" is the stock box sucks air right off the hot motor and puts that hot air right back into the motor making it even hotter.

    Second I think the air box located where it is and its bottom intake it sucks more dust (from the low position and the front wheel etc.) into the air box than other methods. In dusty situations or following in a group ride twice I have CLOGGED my air filter. I have had to stop and pull it out and put in my spare filter for just this situation. The bike was running way too lean and loosing power and then getting hotter.

    So the benefits in "Theory" are taking in cooler air and slightly cleaner air from the new location. I think it will provide a slightly deeper water crossing line too.

    The pics are not great but they work. What do you think about my Theory?
    Attached Images
    [​IMG]
    Front intake

    New intake position
    Attached Images
    [​IMG]
    #1
  2. vecchio Lupo

    vecchio Lupo Diplomatico Di Moto

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    I like the theory, but I question the science. Example, take a 6" section of 3/4 inch hose and breath through it, easy right? Now take a 6' section and breath, harder is it not? I like that you get a ram air effect, perhaps if you split the hose near the filter and ran two scoops to the front, that would double the intake and increase velocity at the filter.

    I'm with you and can't wait to start experimenting on my own, thanks for a great idea.
    #2
  3. Mr. Cob

    Mr. Cob Howling "Mad", Adventurer

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    Howdy Cory,

    This is only my opinion worth exactly what you paid for it. A fellow up in Canada tried much the same setup about a year ago and asked the same question you asked. I suggested that he use a larger diameter tube with as smooth as possiable an interior making the over all length just long enough to do the job. The restriction of the corrugated tube, its length and small diameter will restrict intake flow. The fellow in Canada ended up with 4 inch diameter smooth tubing going into a home made air box that mounted along side of the gas tank, this he reported worked well. Just some things to think about, then again what you have done may work well in your application, do let us know how it all pans out. :deal
    #3
  4. vortexau

    vortexau Outside the Pod-bay

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    #4
  5. Gummiente

    Gummiente Rebel Without A Clue

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    I am that fellow. You can read all about the R&D that went into my airbox setup (the final version of which is still on the bike today and has yet to require a filter change) starting on pg 5 of my Ural blog.
    #5
  6. Mr. Cob

    Mr. Cob Howling "Mad", Adventurer

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    Howdy Gummiente,

    Please excuse me forgetting your name, its a problem I have always had and its getting worse as I get older.:cry However I did remember that your from Canada and that you made a functional air box and filter that should be worth a couple of points, eh. :lol3 :deal
    #6
  7. Hotmamaandme

    Hotmamaandme Wishing I was riding RTW

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    I noticed in the pics for the 08 black dog that Don and Sergey have what appear to be stock air boxes. I know that you did a custom box. Are you aware of what Don and Sergey if any mods they have done for the air box? Are they using the stock filter? I noticed that there is room in the box for a taller filter but it is not used. I think this is part of the issue on the glogging the filter Im trying to avoid. I run a K&N replacement for the stock filter which is a K&N type filter as well. I carry a spare filter ready to swap out when or if I need too. I think this is crazy (having to clean an air filter on a single ride) but short of doing a custom box or finding a filter that fits in the stock box that is taller I see no option. Any other filter options other than K&N?
    #7
  8. Bozola

    Bozola Complete Bastard

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    I ran a stock filter on the Blackdog and had no problems on the 250 mile course...but this year the dust was down. I carry an extra just in case, as I've heard the stories of the breathing problems with the Ural. I had no problems in the 50+ miles of torrential downpour, either (and that includes the electrics). I understand that last year the dust was so think that it was taking down a lot of bikes, not just the Urals.

    I was seriously sweating bullets when I got momentarially stuck in the mud lake that the bike would sink up to the air box. You never need 2wd until you really need it, then it saves your life.
    #8
  9. Mr. Cob

    Mr. Cob Howling "Mad", Adventurer

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    Howdy Cory,

    To answer your question as best I can. Don uses the stock air box and the K&N filter, he has constructed a water-dam to keep most of the splash out of the filter and also uses a piece of oiled foam filter material that fits into and completely covers the air inlet.

    Sergey uses a special one off factory prototype snorkel that has a vented cap on the inlet end and feeds into a special made form fitting plastic housing that bolts to the bottom of the stock 2006 and up air box.

    Both of those systems work, mine just works a lot better, is much easier to service and will go for a long time between servicing. I installed my V3.2 air box and filter system before going to Death Valley in January of 2008 and have yet to touch it as far as servicing, in that time it has been exposed to miles of dust, rain, mud and snow. It took me a while to come up with what I am now using but for me it works and I see no further need to experiment as I think I have it about as good as its going to get.
    #9
  10. Hotmamaandme

    Hotmamaandme Wishing I was riding RTW

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    Thanks Dave. Would you happen to have any pictures of Don's and or Sergey's air boxes?

    On a report of the snorkle:
    I test rode it yesterday and today with the snorkle. Low RPM's no noticeable difference. High way RPM's felt like it wasnt getting enough air and I noticed some slight back fire or sputter.

    So it might be a useful idea for low speed stuff and might work well in keeping the filter cleaner. I dont think I will run this all the time and until I find a simpler way of hooking it up with out taking the lid off the box to get the tube in the intake hole its a pain in the ass.

    So I put a peice of oiled filter foam slightly larger than the filter under the filter covering the hole and its held in place by the filter. I will see how this works. Stand by to stand by.


    #10
  11. Mr. Cob

    Mr. Cob Howling "Mad", Adventurer

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    Howdy Cory,

    I can't post photos of some things that I am aware of, I don't want the Russian Mafia on my arse. :eek1

    Go to and check out Gummiente's blog, also take a peek at the posts that WyoWilliys and PeteT, have put up on the Soviet Steeds web site, all of these folks have made their own air box's and use unique filters to get the job done.:evil

    The setup Don uses still gets clogged, the one Sergey uses he doesn't like as the tubing restricts air flow. As you have noticed at low rpms the restriction doesn't have a huge affect however get some rpm's and the need for power and ANY restriction will cause a problem.:cry
    #11
  12. wyowillys46

    wyowillys46 Tooteling my horn trumpet melodiously.

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    Here's mine. I haven't done anything to the filters since I built the airbox this last winter. Dust, rain, and snow don't really seem to affect it. I did notice a slight increase in power, but the airbox is loud. I'm pretty used to it by now. It also drips oil from the breather. That's the one thing I need to fix, although it really isn't a problem. Just makes things a bit dirty.

    [​IMG]
    #12
  13. Hotmamaandme

    Hotmamaandme Wishing I was riding RTW

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    Hey bud, are you still thinking about making these and skid plates for some profit? I really like your skid plate. I really need your air box. Name your price Ill pay it.

    #13