Johnmor
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| posted on 16/9/06 at 04:11 PM |
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Exhaust Teats during SVA
What sort of test can i expect for a 1990 engine. the thing is i have had to insert packing material into the exhaust to reduce the noise and have
just realised that any test probe may be difficult to insert into the exhaust tail.
I used a DB killer and then had to insert further packing to reduce the noise to 100 db at 3700 revs.
Is it a visual test or is that wishful thinking?
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DIY Si
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| posted on 16/9/06 at 04:21 PM |
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Wishful thinking I'm afraid. I thnks it's soemthing like <4% co, and soemthing about HC, but can't remember. Also, the tester
will need to be able to insert his probe  or he may fail you!
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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Humbug
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| posted on 16/9/06 at 04:32 PM |
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I must admit that I expected something else when I saw "exhaust teats"... 
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Johnmor
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| posted on 16/9/06 at 05:20 PM |
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Yes my typing not what it could be.
May have to rethink, and pack middle box.
cheers.
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givemethebighammer
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| posted on 16/9/06 at 08:04 PM |
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First used before 1st August 1975 Visual smoke test
First used before 1st August 1986 Metered test at idle (non-catalyst test)
max 4.5%CO by vol
max 0.12%HC by vol (1200ppm)
First used before 1st August 1992 Metered test at idle (non-catalyst test)
max 3.5%CO by vol
max 0.12%HC by vol (1200ppm)
First used on or after 1st August 1995
Max idle CO 0.5% vol
Max fast idle CO 0.3% vol
Max fast idle HC 200 ppm
Min fast idle lambda 0.97
Max fast idle lambda 1.03
Min fast idle speed 2500
Max fast idle speed 3000
from blatchat site
[Edited on 16/9/06 by givemethebighammer]
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DorsetStrider
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| posted on 17/9/06 at 12:06 AM |
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I thought that if you were going for a Q plate it was just visual... or is that only at MOT?
Who the f**K tightened this up!
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Hellfire
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| posted on 17/9/06 at 08:41 AM |
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I would suggest fitting a silencer to your exhaust system if you've done all that work and still got 100db @ 3,700 rpm.
Seriously though, what silencer do you have fitted at the moment and how are you measuring the noise?
Phil
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02GF74
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| posted on 19/9/06 at 12:42 PM |
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quote:
Originally posted by DorsetStrider
I thought that if you were going for a Q plate it was just visual... or is that only at MOT?
engine test for SVA and MOT are 2 different things, at least for the time being.
SVA test engines to emissions according to engine age; you need to provide proof of age at the test.
MOT with Q-plate ( age inderterminable)will have to test it according to visual ... but sure I've read somewhere that even MOT could use engine
number to determine the age and use the approprirate test; may be something that will be brought in?
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