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Thread: Shutting Up Your Exhaust Temporarily

  1. #1
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    Default Shutting Up Your Exhaust Temporarily

    here is what i was told by the owner of an exhaust shop in ascot:

    things you need:
    tin snips
    metal sheet
    piece of wood around 20x20cm or more
    drill and drill set
    artliner
    spanners
    money

    1.
    you start off by measuring your exhaust noise level and comparing it to the levels specified by your state, and find out how many DB you need to drop.
    each of the plates that i made take off around about 5 DB depending on the pattern you create so work out how man of these you will need to make

    2.
    un-bolt your rear most exhaust flange and remove the gasket, take that to an exhaust shop and get 2 new ones for every plate your making (if your gasket is in good condition you will only need 1 new one)



    3.
    get a sheet of 1-2mm of tin/steel/whatever you can get your hands on and lay the gasket down on it and outline the gasket.
    once this is done plot out where you are going to put the holes, i used 12mm one in middle and lots of 6mm holes around it, it dropped 8db.
    REMEMBER TO NOT RESTRICT THE FLOW TOO MUCH



    4.
    place the sheet down on the piece of wood and get the drill with drill bit and put your feet as close to the holes you are drilling as possible to stop the metal from pulling up.
    start drilling the holes!



    5.
    once all the holes are there and your happy with the pretty pattern you made get out the tin snips and cut out the plate



    6.
    sandwich the plate you have just made in between the flange gaskets and put it in place and torque down those bolts
    if I could trade kids for cars, I'd be turning the little critters out one every nine months.

  2. #2
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    Default

    that is a awesome idea ... now why didnt i think of that instead of making a DIY slincer.
    Originally Posted by cicca_294
    my dads mate is getting one, in white, aus delivered.
    his mate has an imported on in white,
    and their mate has a blood red one with a 25k new exhaust system...

    i wish i had enough money for a freaking corolla

  3. #3
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    if you have 1 in at the rear right before the diff it works really well, if you want another in your system i advise you have the larger holes on the outer to change the pattern and make it more effective.

    DO NOT PUT ON RIGHT AFTER EXTRACTORS
    as they will melt unless you use higher quality steel
    if I could trade kids for cars, I'd be turning the little critters out one every nine months.

  4. #4
    Veteran Rice86's Avatar
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    Default

    its so simple and great...well done mate
    dose

  5. #5
    Senior Member 86coupe's Avatar
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    How much power do you lose by installing one of these. Is it noticeable? I'll be driving from Cairns to Brisbane and back again shortly. The exhaust gets pretty annoying on long trips like that. Was considering getting a quieter muffler for the trip, but if this does the job without causing any damage, and I can still overtake, I'll be happy.

  6. #6
    Veteran Rice86's Avatar
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    im sure you wont lose shit all in power

    when upgrading exhaust from standard to something bigger wont gain anything more close to 30kw for NA anyways (just pulling random figues for example)...so restirction of the flow wont be causing it to be worse then standard i can imagine, hence why it makes it more quiet
    dose

  7. #7
    Senior Member Matt-AE86's Avatar
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    It's a good idea for shutting it up but I wouldn't keep it there for a long time and they usually blow out if you try to give it stick often. It stops a lot of back pressure and can blow other gaskets and eventually upset your motor.

    Good for going over a pits inspection or something for sure.

  8. #8
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    yeh this is purely for engineering my car, the sound test came up at 89 dbA which is a hell of alot better than the 121 it started with before the muffler and baffle plate

    the you want to make sure the hole size is no smaller than whatever is stock on your engine, so if you have a 2 inch stock exhaust then make sure you have a minimum of 2 inches of holes.
    easiest way to do this is drill the holes as close as possible which will leave you with minimum restriction and maximum diffusion of the sound wave
    if I could trade kids for cars, I'd be turning the little critters out one every nine months.

  9. #9
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    i drove my car with it in and it it had a little more low down torque and lost a little top end up it still ran perfect and the exhaust shop guy said that it wont harm your car if you only have it in for licencing

    you willl have no problem as long as you use 2 gaskets and take your time making a your plate

    glad you all like it
    if I could trade kids for cars, I'd be turning the little critters out one every nine months.

  10. #10
    todd
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    looks like a good idea for inspections etc.

    however, this is a tried and true method for a temporary fix


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