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Thread: Side exhaust, which muffler?

Discuss the Austin Healey Sprite and the MG Midget. Two different but similar cars sometimes referred to collectively as the Spridget.

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    Jedi Hopeful Steve P.'s Avatar
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    Side exhaust, which muffler?

    Work is progressing really well and amazingly fast on the '73 Midget I bought
    a couple of weeks ago. While the existing exhaust system is still intact, not
    so sure how long it'll stay that way so I'm considering alternatives. The one I
    like best is a side exhaust just in front of the left, rear tire. And I will be using
    headers too. This car is being built as a weekend warrior/occasional racer s
    don't mind the racket.

    Has anyone tried this and if so what did you use for a muffler? Not much room
    under these things!
    Steve
    MGTD, A-H 100-6 (BN4), A-H 3000 (BJ8), Bugeye, MG Midget(MkI),'78 Midget, Jensen-Healey, MGB-GT, TR4A, '78 Corvette, '64 Lincoln, 240Z, Mercedes 450SLC and 350 SL...and STILL married!

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    Great Pumpkin JPSmit's Avatar
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    Re: Side exhaust, which muffler?

    Motorcycle can?
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

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    Yoda Trevor Jessie's Avatar
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    Re: Side exhaust, which muffler?

    I might try it without a muffler and use a baffle insert.

    Truthfully there is no place for a muffler but the stock location. You do not need the dual box, you can use the straight out the back early style.
    _____________________
    1970/2 MG Midget
    Datsun 5-speed
    Future Fuel Injection Turbo Project
    _________________
    1958/9 Sprite AN5L/1499
    1275 SuperCharged
    Datsun 5-speed
    _________________

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    Jedi Knight apbos's Avatar
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    Re: Side exhaust, which muffler?

    It has bee done with a glasspack. https://www.hemmings.com/hsx/stories..._feature6.html not much room as you can see in the pictures. Finding the glass pack in the correct size willl also be a problem. Thought about it for my own Speedwell Sprite.
    regards
    Paul
    1949 TR 2000 roadster
    1960 MG MGA
    1-1959 AN5L/9477 AH Bugeye Sprite
    1- 1958 Triumph TR3 TS 28115

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    Re: Side exhaust, which muffler?

    Mine is glass packs similar to a cobra style, they are great, but it depends on your engine, etc.

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    Re: Side exhaust, which muffler?

    Quote Originally Posted by Steve P. View Post
    Work is progressing really well and amazingly fast on the '73 Midget I bought
    a couple of weeks ago. While the existing exhaust system is still intact, not
    so sure how long it'll stay that way so I'm considering alternatives. The one I
    like best is a side exhaust just in front of the left, rear tire. And I will be using
    headers too. This car is being built as a weekend warrior/occasional racer s
    don't mind the racket.

    Has anyone tried this and if so what did you use for a muffler? Not much room
    under these things!
    Steve
    How about this:



    I thought about dumping the exhaust just before the rear wheel on my sprite but had the same concern regarding space. Im running a 12a rotary though so squeezing a decent sized muffler under the car is not likely going to happen. Guess I will have to route it out the back of the car like everyone else.
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    '65 Austin Healey Sprite MKIII
    street ported Mazda 12a
    Motortopia
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    Jedi Knight apbos's Avatar
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    Re: Side exhaust, which muffler?

    Steve
    https://www.ebay.com/itm/Exhaust-Muf...277fe1&vxp=mtr I think this will work. It will be about 25% noise reduction. Let me know what you do as I am thinking about changing my exhaust when I pull the motor for my Datsun 210 transmission conversion.

    Paul
    1949 TR 2000 roadster
    1960 MG MGA
    1-1959 AN5L/9477 AH Bugeye Sprite
    1- 1958 Triumph TR3 TS 28115

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    Jedi Hopeful Steve P.'s Avatar
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    Re: Side exhaust, which muffler?

    Thanks for the suggestions guys! Hadn't considered using a motorcycle muff.
    I like it and in fact there is a Spridget in the area that uses one (rear mounted). Doesn't sound
    like a side exhaust is practical but I will try to mock up something with what I have
    available. Will post the results. Just crammed the headers in the engine bay and the outlet
    is 2" dia. Bigger than M/C muffs I've seen.

    The next Spridget I build will be a radical engine swap (RX7 or Lotus 907) so I'm
    thinking about this as I build this mostly stock car. Hope to get together with some
    of you guys that have gone down this road.
    Steve
    MGTD, A-H 100-6 (BN4), A-H 3000 (BJ8), Bugeye, MG Midget(MkI),'78 Midget, Jensen-Healey, MGB-GT, TR4A, '78 Corvette, '64 Lincoln, 240Z, Mercedes 450SLC and 350 SL...and STILL married!

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    Great Pumpkin JPSmit's Avatar
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    Re: Side exhaust, which muffler?

    I am wondering about the space behind the front wheel well - and next to the battery - inside the front fender - where I drop parts when working on the clutch - is there enough space for a top entry, bottom exit or bottom entry top exit?
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

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    Jedi Hopeful Steve P.'s Avatar
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    Re: Side exhaust, which muffler?

    Quote Originally Posted by JPSmit View Post
    I am wondering about the space behind the front wheel well - and next to the battery - inside the front fender - where I drop parts when working on the clutch - is there enough space for a top entry, bottom exit or bottom entry top exit?
    Possibly. But you'd have to run the pipe up and over, then down to do this. Another thing I'm
    looking into is called a 'baffle pipe' which is often used on M/C's. Its just a straight pipe
    with some baffles inside. About as small as you can get and I've heard they work quite well
    with a minimum of back pressure.
    Steve
    MGTD, A-H 100-6 (BN4), A-H 3000 (BJ8), Bugeye, MG Midget(MkI),'78 Midget, Jensen-Healey, MGB-GT, TR4A, '78 Corvette, '64 Lincoln, 240Z, Mercedes 450SLC and 350 SL...and STILL married!

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