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  1. #1
    Forum User evouk's Avatar
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    Exhausts and DB noise levels

    I am having trouble with my competition exhaust thats a bit too noisy, its a 2 1/4 inch diamter pipe, its got bags of pressure going through it which prooves the engine is breathhing in well but not getting the gasses out as good. It wa stested at OULTON at 102 db static test. Its also burnt of some of the powder coating!!!

    Im having a large cenre silencer fitted to see if this helps, if not a 2 1/2 inch system may need to be made up.

    What exhausts are others using on there race/track cars? And what DB readings are you getting?

  2. #2
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    im not 100% sure what mine was but at donington in feb it was a 98db drive by limit, and didnt pass over that, i run the mongoose system with decat and supersprint manifold, i cant remember the exact diameter but the mongoose is bigger then the scorpion/devil systems ive had

    btw scoprion with same decat/manifold only hit 86db static at oulton and my mongoose is abit louder! lol

  3. #3
    Forum User evouk's Avatar
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    ok i think the mongoose is a 3 inch system isnt it?

    Have you got much back pressure?

  4. #4
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    mongoose is 2.5 or 63mm system..

  5. #5
    Forum User evouk's Avatar
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    cheers...........

  6. #6
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    What about taking a your cat along to trackdays, if its a bit loud bung the cat on, ok it saps your power, but atleast you can do the day, then sort the problems out later

  7. #7
    Forum User evouk's Avatar
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    an idea yes but i dont have a de cat pipe i have a straight through system made up especially for the car...

  8. #8
    Forum User arj256's Avatar
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    I have a Supersprint manifold, decat and a straight through devil cat back system 2" bore.
    And thats been recorded as 98db.

  9. #9
    Forum User stew's Avatar
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    mine was 100.something at cadwell in 06. that was static @ 4krpm and since then ive had another silencer added.

  10. #10
    Forum User evouk's Avatar
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    Ive had another centre section silencer added today, has lowered it a bit but when you open the engine up it roars!!!

    Will have to wait till i can get it properly checked out at a track day or someone with a noise meter.


 

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