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Power loss from exhaust mods?
#1509665
28/09/2014 19:22
28/09/2014 19:22
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Downhillryder
Unregistered
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Downhillryder
Unregistered
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I have a 2.75 inch exhaust system all the way from turbo to tip. It consists of center box and back box but no cat. The pipe is continuous from downpipe through the center box, over the wheels to just before the start of the back box where there is a flange join. The car has been tested to 315bhp, but that was a while ago and before my ownership.
I'd like to get legal and would like to add a sports cat without loosing power. Since 2.75 inch parts are hard to find on ebay/Web I'm considering the following :
Cut out center box, replace with 2.75"/3" expander connected to a 3", 200 cell sports cat connected to a small center box with 3" pipe fittings connected to 3"/2.75" reducer back into main pipe.
Can anyone give me a guess as to how much power this might cost?
Is there better way to add a cat?
Should I just get a complete spare system for mot time?
Just trying some forward planning for once!
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Re: Power loss from exhaust mods?
[Re: ]
#1509702
29/09/2014 09:02
29/09/2014 09:02
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mr_cheese
Unregistered
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mr_cheese
Unregistered
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Jst do wat most of us do and keep a cat for mot time, only takes couple min to swap over!
Last edited by mr_cheese; 29/09/2014 09:03.
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Re: Power loss from exhaust mods?
[Re: Scuderia]
#1509703
29/09/2014 09:07
29/09/2014 09:07
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mr_cheese
Unregistered
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mr_cheese
Unregistered
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No power loss frm putting cat back on?? Sure as hell does!! Without cat my wheels spin at full chat yet doesnt when cats on!! Not very.sicentific like but does show how much power you loose without that freeflowing air!
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Re: Power loss from exhaust mods?
[Re: ]
#1509740
29/09/2014 14:04
29/09/2014 14:04
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Joined: Nov 2006
Posts: 1,580
Melbourne, Australia
Scuderia
My life on the forum
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My life on the forum
Joined: Nov 2006
Posts: 1,580
Melbourne, Australia
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No power loss frm putting cat back on?? Sure as hell does!! Without cat my wheels spin at full chat yet doesnt when cats on!! Not very.sicentific like but does show how much power you loose without that freeflowing air! Is that a 3" Hi flow cat or the std one?
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Re: Power loss from exhaust mods?
[Re: Scuderia]
#1510090
02/10/2014 01:50
02/10/2014 01:50
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mr_cheese
Unregistered
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mr_cheese
Unregistered
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No power loss frm putting cat back on?? Sure as hell does!! Without cat my wheels spin at full chat yet doesnt when cats on!! Not very.sicentific like but does show how much power you loose without that freeflowing air! Is that a 3" Hi flow cat or the std one? Not sure if its high flow but yea its 3inc cat, got full 3inc exhaust system you see.. but even tho its 3inc cat it deffo drops performance when put bk on for mot.. As i said befor without cat i floor the loud peddle and my wheels spin but soon as cats on for mot she wont spin at full chat!! Make your own minds up! Lol
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