bellmouth question, again

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  • Agemax
    Forum Guru
    • Apr 2008
    • 8371
    • plymouth uk

    #1

    bellmouth question, again

    how will a heat shield between the bellmouths and the battery "space" affect the air flow to the carbs. will it have an adverse effect or maybe a vortex effect with the air rushing in, hitting the shield and getting sucked in by the carbs?
    1978 GS1085.

    Just remember, an opinion without 3.14 is just an onion!
  • mlinder

    #2
    This is too vague of a question to even begin giving answers.

    Comment

    • Agemax
      Forum Guru
      • Apr 2008
      • 8371
      • plymouth uk

      #3
      Originally posted by mlinder
      This is too vague of a question to even begin giving answers.
      how much detail do you need?
      1978 GS1085.

      Just remember, an opinion without 3.14 is just an onion!

      Comment

      • Big T
        Forum LongTimer
        Past Site Supporter
        Super Site Supporter
        • Mar 2005
        • 12361
        • West Slope, OR

        #4
        If it's a heat shield, it should be on the motor side of the carbs

        As to your question, probably no effect. Bellmouths don't need much space to suck air
        1978 GS 1000 (since new)
        1979 GS 1000 (The Fridge, superbike replica project)
        1978 GS 1000 (parts)
        1981 GS 850 (anyone want a project?)
        1981 GPZ 550 (backroad screamer)
        1970 450 Mk IIID (THUMP!)
        2007 DRz 400S
        1999 ATK 490ES
        1994 DR 350SES

        Comment

        • Mindless

          #5
          Most commonly you place a heat shield between the carbs and the engine / cylinder head to keep the fuel in the carbs as cool as possible. Don't see much point in putting one as a firewall between the engine and the "electronics department"

          As for adverse effects: doubtful. The engine can only suck in so much air and the heat shield won't restrict the intake in any way that I can see.

          Comment

          • Agemax
            Forum Guru
            • Apr 2008
            • 8371
            • plymouth uk

            #6
            not so much a firewall just a bit of protection and a bit of cosmetic hardware, just dont know how bellmouths react compared to pods as far as air intake, pulsing goes
            1978 GS1085.

            Just remember, an opinion without 3.14 is just an onion!

            Comment

            • Agemax
              Forum Guru
              • Apr 2008
              • 8371
              • plymouth uk

              #7
              maybe drilling some holes in the heat shield may help the air flow as when i am sat on the bike my legs cover the whole sides of the carbs so they arent really getting the air flow around them when the bike is moving forward?
              1978 GS1085.

              Just remember, an opinion without 3.14 is just an onion!

              Comment

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