Do exhaust baffles affect performance?
16 January 2010, 10:09 PM
#1
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Do exhaust baffles affect performance?
as above
had my first complaint/hint about the noisy exhaust today from a neighbour.
thinking of putting it in.
any negatives?
cheers
had my first complaint/hint about the noisy exhaust today from a neighbour.
thinking of putting it in.
any negatives?
cheers
16 January 2010, 10:23 PM
#2
By "baffles" I take it you mean a noise-restricting 'bung' that fit in the end of the tailpipe?
If so, and from a logical point of view, they have a small opening, so this will back-up the gases i.e. slow them down from exiting the system. This means the engine is not getting air in and out as fast as it would if it didn't have the bung, so some power should defo be lost. How much - or whether it's tangible - don't know.
Bungs could have a worrying effect of raising EGTs though (if originally mapped W/O the bung in place)...
If so, and from a logical point of view, they have a small opening, so this will back-up the gases i.e. slow them down from exiting the system. This means the engine is not getting air in and out as fast as it would if it didn't have the bung, so some power should defo be lost. How much - or whether it's tangible - don't know.
Bungs could have a worrying effect of raising EGTs though (if originally mapped W/O the bung in place)...
Last edited by joz8968; 16 January 2010 at 10:31 PM.
16 January 2010, 10:31 PM
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cheers for that, yeh the bung is what i am referring too
and yeah it was mapped without the bung in place, i'll leave it a while, and try not to use it if i know ill be home late, i'll use the other car.
and yeah it was mapped without the bung in place, i'll leave it a while, and try not to use it if i know ill be home late, i'll use the other car.
Last edited by eggy790; 16 January 2010 at 10:34 PM.
16 January 2010, 10:38 PM
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lol mine was 11.30 yesterday too
lol and i came up the road and popped the exhaust as i went passed him and then let it idle for a minute or so , dont think he was impressed after the lil chat today lol
lol and i came up the road and popped the exhaust as i went passed him and then let it idle for a minute or so , dont think he was impressed after the lil chat today lol
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16 January 2010, 11:42 PM
#11
Yes baffles do effect performance,just got in and fitted mine before i went out at 1020 this evening,car is not slow ,but does not pull as strong with baffle in.My neighbours are all over 60+ and i have an old peoples home opposite so at night i use the baffle .
16 January 2010, 11:47 PM
#13
i have complaints about my exhaust all the time so put a bung in and it seems to run better with it in and has knocked the noise down alot.i still get complaints about it with bung in and just tell them u can live with it this loud or the bungs coming out and it soons shuts them up
17 January 2010, 12:34 AM
#16
my neighbour compainted about mine when i was working in garage with engine running but door open, he stood shouting at me. the exhaust was facing the door and i was under bonnet. so i just revved it up a lil to drown him out. he soon go the picture and walked off. no hassle since. some ppl, no matter what u do they never happy. so i make myself happy.
17 January 2010, 07:53 AM
#17
Joz8968,honestly I have not had 1 single complaint,if I leave early in the morning,I just push the bung in and coz it is tight it stays put ,when I get out of the street I simply pull it out- takes 5 secs.
However went back out last night and left it screwed in , on the way home this morning 1 noticeable thing is : car does not pop & bang at all with the bung in ,which takes some getting use to lol
However went back out last night and left it screwed in , on the way home this morning 1 noticeable thing is : car does not pop & bang at all with the bung in ,which takes some getting use to lol
Last edited by midnight; 17 January 2010 at 07:58 AM.
17 January 2010, 09:22 AM
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. You will feel the restriction if you try and push the car which is telling you its a no no.
17 January 2010, 10:08 AM
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i moved into new house that shares private driveway with 2 other houses on a friday 5 months ago then on the sat bought my scooby......as i got out of it for the first time after buying it my old fart of a neighbour came over and said i have to change the exhaust for a quiet one......since then had months of greif about me cleaning car in driveway etc...wait til i get my motocrossbike and jetski this summer.that will shut her up...
17 January 2010, 12:12 PM
#20
Lawfully, so long as the exhaust is at or below the DVLA's/govt's drive-by dB test (IS it? 
lol), then neighbours can complain all they want - you're doing nothing 'wrong'.
So long as you're not being an unreasonable pillock by revving the car unnecessarily - and so disturbing the peace (probably) - as you approach your parking space, then they can go stuff themselves IMO.
lol), then neighbours can complain all they want - you're doing nothing 'wrong'.So long as you're not being an unreasonable pillock by revving the car unnecessarily - and so disturbing the peace (probably) - as you approach your parking space, then they can go stuff themselves IMO.
Last edited by joz8968; 17 January 2010 at 12:17 PM.
17 January 2010, 12:32 PM
#22
Oh dear - it's not looking good 
:-
VCAcarfueldata.org.uk - Cars and Noise
That said, doesn't the offficial test involve a vehicle driving (at X mph) past a static standing tester (at Y meters/yards away) with a professional calibrated SLM??
Don't know what the figures are for X and Y though, and what dB level that would extrapolate to if you were next to the car (as per "the disgruntled neighbour" scenario lol)....
:-VCAcarfueldata.org.uk - Cars and Noise
That said, doesn't the offficial test involve a vehicle driving (at X mph) past a static standing tester (at Y meters/yards away) with a professional calibrated SLM??
Don't know what the figures are for X and Y though, and what dB level that would extrapolate to if you were next to the car (as per "the disgruntled neighbour" scenario lol)....
Last edited by joz8968; 17 January 2010 at 01:28 PM.
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