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baffles

  1. #1
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    Default baffles

    anyone ever drill out the center of thier baffles trying to regain rpm and satisfy the popo at the same time???? mike

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    SLOW MEMBER slowboy's Avatar
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    The only way I have found to keep the noise down without hurting power was to put on a set of shotgun silencers.
    WORK HARDER, MILLIONS ON WELFARE DEPEND ON YOU.

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    Senior Member Daddy B's Avatar
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    For sure, I ruined alot of cheap drill bits drilling multiple holes in the stainless plate. Even with a good bit....I have heard that cold water cooling the surface will help bit cut right through but have not tried. The baffles never seem to sound worth a @^%^%$. But I just bought a new set that I will be drilling out as much as possible....Ends up looking like a bee hive GOT YOUR BAFFLES IN??? yES SIR, "tHOsE dOn't LOok likE mUcH", uMM..............baffles yep they are in....

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    What baffels were you trying to drill out?

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    80 doller entry level "sound benders"

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    CLASSIC HOTBOATER wideopen's Avatar
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    spider monkey racing

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    From what I've seen in Iowa, they live or die by the DB meter, and the tickets can vary in $$
    Upper Midwest Power Boat Association
    DRAG BOAT RACING UMPBA #926


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    Senior Member YumaJet's Avatar
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    Default muffler baffles


    hello, early last year i had asked a question about using mufflers and you referred me to the above site. i have 4" collectors on my bassett headers and just want to make sure i order the correct ones.

    New Schoenfeld Insert Muffler Diameter: 4" 43540 JRMotorsports.com, would be the correct mufflers right?

    dumb question, knowing i have 4" collectors but just want to double check. someone had mentioned to use 3 1/2", but that didnt sound right.

    thanks

    albert
    boatless....

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    Senior Member W.O.T's Avatar
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    Quote Originally Posted by YumaJet View Post
    hello, early last year i had asked a question about using mufflers and you referred me to the above site. i have 4" collectors on my bassett headers and just want to make sure i order the correct ones.

    New Schoenfeld Insert Muffler Diameter: 4" 43540 JRMotorsports.com, would be the correct mufflers right?

    dumb question, knowing i have 4" collectors but just want to double check. someone had mentioned to use 3 1/2", but that didnt sound right.

    thanks

    albert

    These Are What Im Using Right Now.

  12. #10
    Senior Member W.O.T's Avatar
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    Quote Originally Posted by mikewtx19 View Post
    anyone ever drill out the center of thier baffles trying to regain rpm and satisfy the popo at the same time???? mike
    I Had A Set Like This But Lost One Out Of the Back Of My Truck.

    I Just Set them On the Groung And With A Chisel And hammer Gave The Weld Spots Where The Center Piece Is A Few Good Hits And They Popped Right Out. Satisfied The Water Cops.

  13. #11
    Senior Member H20MOFO's Avatar
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    Quote Originally Posted by W.O.T View Post
    I Had A Set Like This But Lost One Out Of the Back Of My Truck.

    I Just Set them On the Groung And With A Chisel And hammer Gave The Weld Spots Where The Center Piece Is A Few Good Hits And They Popped Right Out. Satisfied The Water Cops.
    Haha...I like it... I have 2 sets...gonna do this to one of em. I had a leo come up to me in wyoming(flaming gorge) asked me if I had mufflers...I said nope. After he let me off with a warning and complimented me on my boat...he asked me how to tell if a boat like mine had mufflers. True story. On another lake I was approached by a leo(in utah/echo res)...he had a db meter. Luckily I broke a rocker and told him I couldnt start my boat. Never thought I would say luckily I broke something. I asked the wyoming leo what the db limit was. He said to me" I dunno....just gotta have mufflers to be legal.
    Another Hot Boat refugee

  14. #12
    What the Hell is That? 72Hondo's Avatar
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    654. Muffler requirement.
    (a) (1) For the purposes of this section, a ‘‘muffler’’ or
    ‘‘muffler system’’ is a sound suppression device or system that is designed and
    installed to abate the sound of exhaust gases emitted from an internal combustion
    engine and prevents excessive or unusual noise.
    (2) For the purposes of this section, an underwater through-the-propeller-hub
    exhaust outlet system is a muffler system.
    (b) A motorized recreational vessel that is operated in or upon the inland waters, or
    in or upon ocean waters that are within one mile of the coastline of the state shall be
    equipped at all times with a muffler or a muffler system that is all of the following:
    (1) In good working condition.
    (2) In constant operation.
    (3) Installed in a manner that effectively brings the vessel into compliance with
    Section 654.05.
    (c) This section does not apply to motorized recreational vessels competing under
    a local public entity or United States Coast Guard permit in a regatta, in a boat race,
    while on trial runs, or while on official trials for speed records during the time and in
    the designated area authorized by the permit. In addition, this section does not apply
    to motorized recreational vessels preparing for a race or regatta if authorized by a
    permit issued by the local entity having jurisdiction over the area where the
    preparations occur.
    (d) This section shall become operative on January 1, 2005.


    654.03. Mufflers; Manufacture and use of motorized recreational vessels.
    (a) Aperson may not manufacture for sale a motorized recreational vessel that is not
    equipped with a muffler or muffler system, as defined in subdivision (a) of Section
    654, that brings the vessel into compliance with paragraph (2) of subdivision (a) of
    Section 654.05, except as authorized under subdivision (b).
    (b) A person may manufacture for sale a motorized recreational vessel that is not
    equipped as required under subdivision (a) if the vessel is designed, manufactured, and
    sold for the sole purpose of competing in racing events.
    (c) A person may not sell a vessel that is exempted under subdivision (b) unless
    there is compliance with both of the following:
    (1) The sales agreement includes a statement that the vessel is designed, manufactured,
    and sold for the sole purpose of competing in racing events and may not be
    operated in or upon the inland waters, or in or upon ocean waters that are within one
    mile of the coastline of the state, except under the conditions described in subdivision
    (c) of Section 654.
    (2) The statement described in paragraph (1) is signed by both the buyer and the
    seller.
    (d) Both the buyer and the seller of a vessel exempted under subdivision (b) shall
    maintain copies of the sales agreement described in paragraph (1) of subdivision (c).
    (e) A person may not operate a vessel that is exempted under subdivision (b) unless
    a copy of the sales agreement described in paragraph (1) of subdivision (c) is on board
    the vessel.
    (f) A person may not operate a vessel that is exempted under subdivision (b) in or
    upon the inland waters, or in or upon ocean waters within one mile of the coastline of
    the state, except under the conditions described in subdivision (c) of Section 654.
    (g) This section shall become operative on January 1, 2005.
    CALIFORNIA BOATING LAW
    58
    654.05. Motorboat noise.
    (a) The owner of a motorized recreational vessel that
    is numbered pursuant to Section 9850 of the Vehicle Code, or that is documented by
    an agency of the federal government, shall not operate, or authorize the operation of,
    the vessel in or upon the inland waters, or in or upon ocean waters that are within one
    mile of the coastline of the state, in a manner that exceeds the following noise levels:
    (1) For engines manufactured before January 1, 1993, a noise level of
    90 dB(A) when subjected to the Society of Automotive Engineers Recommended
    Practice SAE J2005 (Stationary Sound Level Measurement Procedure for Pleasure
    Motorboats).
    (2) For engines manufactured on or after January 1, 1993, a noise level of 88 dB(A)
    when subjected to the Society of Automotive Engineers Recommended Practice SAE
    J2005 (Stationary Sound Level Measurement Procedure for Pleasure Motorboats).
    (3) A noise level of 75 dB(A) measured as specified in the Society of Automotive
    Engineers Recommended Practice SAE J1970 (Shoreline Sound Level Measurement
    Procedure). However, a measurement of noise level that is in compliance with this
    paragraph does not preclude the conducting of a test of noise levels under paragraph
    (1) or (2).
    (b) A law enforcement officer utilizing a decibel measuring device for the purposes
    of enforcing this section shall be knowledgeable and proficient in the use of that
    device.
    (c) The department may, by regulation, revise the measurement procedure when
    deemed necessary to adjust to advances in technology.
    (d) This section does not apply to motorized recreational vessels competing under
    a local public entity or United States Coast Guard permit in a regatta, in a boat race,
    while on trial runs, or while on official trials for speed records during the time and in
    the designated area authorized by the permit. In addition, this section does not apply
    to motorized recreational vessels preparing for a race or regatta if authorized by a
    permit issued by the local entity having jurisdiction over the area where these
    preparations occur.

    (e) This section shall become operative on January 1, 2005.


    So if I am to understand this correctly, Water injected headers act as a muffling device.
    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.

  15. #13
    TRG
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    90 DB's for me....I am assuming this due to my engine block being born long before 93'. or does the LEO look at the manuf. date elsewhere?
    Im ordering a set of the Schoenfeld's here shortly! at that price I could afford to keep a set in the boat and the truck, and still be paying half of what all the other guys charge!
    Thanks for the info Wideopen and YumaJet.
    They way I was handled on the launch ramp last year, I will take both sets and double stack them in the collectors! lol

  16. #14
    Senior Member jetboatperformance's Avatar
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    Bought a Certified DB meter a couple years Back I was very surprized at what 90 DB actually was for example , it took a set of Rewarder loovered inserts and Drew Shotguns to Get my 10.5 to 1 SBC to 86 @ three feet

    heres a Led Zep Guitar rift at moderate volume for an Example

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