2.0gti turbo conversion?

[bob23]

DH while you make a compelling argument and while I agree about it being a problem moving to carbs and getting the mixture right, the rest I do not agree with.

Most modern cars do not need cats to pass their emissions test, people think a cat has a much bigger effect than what it really does, if the car is in good running order and has regular services it should be fine.

I have several friends with cars that have no cats, they have either smashed the internals of the cat out or replaced them with an empty casing and they have no problem passing an emissions test, one has a skoda fabia vrs, another has an e39 M5, another has an e36 316 and another has what I think is a mk5 fiesta, not sure what mk is what with the fiesta, probably because I'd rather burn them than look at one, none of these have had a problem with emissions.

Even the tester gave me advice about me losing the cat on my golf, I was just going to put a decat pipe in and put the cat on for the mot so he could see it had one, but he told me to put an empty casing and leave it on.

When I took one of my peugeot's for it's mot it had not been started for over a year, had not been driven for more than 2 years and had not been driven more than 50 miles in 4 years, had not had a service for over 25000 miles, it had no cat as I bought it off someone I knew as scrap, with the intention of fixing it to give to my girlfriend and they had taken the cat off, so I welded an old section of exhaust in which looked like a cat, the engine was cold when it was tested as I had left it at the mot station the night before for them to change a tyre, I naturally expected it to fail on emissions, but it went straight through.

[F17BAD]

Wrong

Mine has past the last 3 MOT with the S3 engine, and NO cat
My car is a August 1993

Yes but you live in a different world to the rest of us, your so-called 'real world', which to the outside sometimes appears maybe a touch pikey and 'flexible' in some respects.

From the DFT MOT manual:

Basic Emissions Test procedure (BET)
The basic emissions test is applied to all petrol fuelled vehicles first used on or after 1 August 1992. Despite its name this test is primarily aimed at identifying, and assessing emissions from, vehicles with advanced emissions control systems such as three-way catalytic converters. The test uses EC minimum in service emission limits for modern cars.

For cars subject to this procedure emissions are assessed during two separate tests. As the procedure is more complicated than the non-catalyst test, the emissions analysers include computer software aimed at guiding the Tester through the test sequence. The primary reason for the introduction of these meters is to ensure that the car is tested accurately.

The first test consists of checking the emissions at ‟fast-idle speed‟ which involves running the engine at a speed of 2500 - 3000 rpm. During this test the emissions of CO and HC will be checked and a further check will be made on the lambda value.

The second test consists of a check of emissions at "normal idle speed" in which the engine will idle between 450 and 1500rpm, but in this case only the CO emissions are assessed.

The emissions limits to be met are specified for both the fast and normal idle tests. At fast idle, CO must be at or less than 0.2%, HC at or less than 200 parts per million (ppm), and the lambda value must be between 0.97 and 1.03. At normal idle, CO must be at or less than 0.3%.

You can read the whole lot here:

http://www.dft.gov.uk/vosa/repository/Emissions%2017th%20Edition.pdf

So although it is *possible* Dear Brad's rocket-powered tugboat might have passed an MOT without a cat on it, provided all of the emissions standards were met, it is unlikely most cars without a cat would pass, especially carb motors, which don't have the same control over the mixture and emissions that an electronic injection controlled motor has.

 

Now, where's BenVicky to back up dear Brad's viewpoint?

The only thing I need to back up what I say is the last 3 MOT certificates...

You chat sh!t.. simples

[danny_p]

MOT certs don't really mean much.

take it to the right mot man and a fire breathing monster that struggels to idel at 1500 rpm and is still chucking 7% co  with HC off the scale  turns in to a purring littel kitten that passes first time...

that screwdriver they "adjust" it with must be magic

[tweed]

Who cares about emissions?

Why do you lot care so much and argue so much about what someone wants to do with their own car?

[bob23]

Because we have nothing better to do!

[tweed]

 

People's need to get a life then

[F17BAD]

People's need to get a life then

THIS

[Gavv8]

Who cares about emissions?

Why do you lot care so much and argue so much about what someone wants to do with their own car?

Because its very very funny...

[tweed]

Who cares about emissions?

Why do you lot care so much and argue so much about what someone wants to do with their own car?

Because its very very funny...

  sometimes