De-cat on my new GT Turbo???
- Thread starter ChrisW
- Start date
Toby@ToyTuning.com
Banned - DO NOT BUY FROM TOYTUNING
Your car only needs a basic idle test which you can pass easily without a cat. A UK car would have a more stringent emissions test where as yours is very lenient, just an idle test. If you can't pass then you engine has serious issues! 
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Toby@ToyTuning.com
Banned - DO NOT BUY FROM TOYTUNING
Can depend on may variables but if we can get a 300bhp GT hrough with standalone management and a side exit then you should be fine
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Monkfish
Member +
The MOT testers handbook states that anything first used before 01 Aug '95 where the engine code cannot be indentified (ie, Starlets 4E-FTE) then the basic idle test is used. The 4E is a very efficient engine, so if it fails that it's fucked. The limits are 3.5% CO2, mine pulled 0.86% running a decat and 180bhp.
Now, here's the problem. Any car first used after 01 Aug '95 where the engine code cannot be indentified requires the basic cat test, with the idle limits at 0.50% and fast idle at 0.30%. So basically, a late GT or ANY Glanza requires a basic cat test. If you own a GLanza and they do the basic idle test, do say anything and take it back next year as they've dropped a bollock!
To answer your last question, de-cat'ing reduces the restriction in the exhaust and lets the gasses flow more freely.
Now, here's the problem. Any car first used after 01 Aug '95 where the engine code cannot be indentified requires the basic cat test, with the idle limits at 0.50% and fast idle at 0.30%. So basically, a late GT or ANY Glanza requires a basic cat test. If you own a GLanza and they do the basic idle test, do say anything and take it back next year as they've dropped a bollock!
To answer your last question, de-cat'ing reduces the restriction in the exhaust and lets the gasses flow more freely.
ChrisW
Lifer
Thanks for that Monkfish, appreciate it! Just one more thing...
I already have a Kakimoto cat-back system and am obviously interested in installing a de-cat pipe. Are there any other mods you would need to have installed at the same time as a de-cat pipe if you know what I mean??? I've heard that by putting on de-cat pipes without installing a few other engine mods, you can damage your engine??? What's the truth in this?
Cheers!
I already have a Kakimoto cat-back system and am obviously interested in installing a de-cat pipe. Are there any other mods you would need to have installed at the same time as a de-cat pipe if you know what I mean??? I've heard that by putting on de-cat pipes without installing a few other engine mods, you can damage your engine??? What's the truth in this?
Cheers!