Paul_J
Member
Registered: 6th Jun 02
Location: London
User status: Offline
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what causes that rasp noise, I get from my exhaust, I have a 1.2 16v Sxi, and a full sebring system, that my mate told me the other day 'isn't road legal' as its meant for race use only...
But if I rev it in say a car park, its like what I could only describe as a rasp that sounds like loads of sparks going off... real crackly.
It gets slightly better when warmed up,
but what causes this in the first place?
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MC Kustoms
Member
Registered: 6th Aug 02
Location: Luton
User status: Offline
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u got a cat
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OFcorsa
Member
Registered: 6th Jan 03
Location: Cheltenham, Gloucestershire
User status: Offline
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i know when it pops its cos of fumes settling on the zorst and basically exploding when it gets hot but i downt know about the rasp.
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Kris TD
Member
Registered: 25th Mar 02
Location: Ware, Hertfordshire
User status: Offline
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removing silencers can create rasp
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Makarus
Member
Registered: 25th Jun 02
Location: Nottingham/Derbyshire Boarder.
User status: Offline
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Yeah, I have a rasp in mine, but only up top end, and I mean right next to the rev limiter, got my centre silencer removed and changed with a full stainless system.
EDIT= Cat back system.
[Edited on 19-12-2003 by Makarus]
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Paul_J
Member
Registered: 6th Jun 02
Location: London
User status: Offline
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yes, I know this, but what is actually causing the rasp sound? the mechanics behind it all?
My system's cat back with silencer removed, but what I've found is 16v cars are more raspier than 8v cars, why is this too... and back to my original question, what actually causes the rasp noise?
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corsa_godfather
Member
Registered: 6th May 03
Location: Greenock,Scotland
User status: Offline
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gases release out the exhaust quicker with no restrictors and react with oxygen and pop,just a guess
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uprated
Member
Registered: 1st Sep 03
Location: York
User status: Offline
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shot in the dark, it happens more in 16v cos they have twice as many valves, putting way more fuel in at once?
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Cheese Man Chris
Member
Registered: 25th Sep 07
Location: Leeds Drives:1.2 Merit
User status: Offline
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Another logical guess,
I got the rasp on a 12v with the centre section removed!
I recon that the rasp is always there, but lack of back pressure and silencing makes the rasp niose allot more pronounced!
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boyracerscotty
Member
Registered: 15th Jul 03
Location: Aberdeenshire
User status: Offline
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I've got a cat back sportex system on mine and its really raspy when the cars cold but once warmed up its got a nice deep note.
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