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?

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!

I must admit that I expected something else when I saw "exhaust teats"...

Yes my typing not what it could be.

May have to rethink, and pack middle box.

cheers.

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]

I thought that if you were going for a Q plate it was just visual... or is that only at MOT?

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

quote:

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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?

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