Middle cat
- Thread starter triplemmm
- Start date
Enuo
Glorified Electrician
Um, you might have slightly higher emmisions, but cats only work well when hot, and only on a long journey will enough heat get into it that it'll actually do anything.
If you WERE concerned with emissions on short journeys, I'd get a coilpack manifold back, only one cat on the manifold but it's slightly longer and so more effective
If you WERE concerned with emissions on short journeys, I'd get a coilpack manifold back, only one cat on the manifold but it's slightly longer and so more effective
Enuo
Glorified Electrician
If the second cat is blocked up removing it might help
A few things can cause poor fuel efficiency:
Binding brakes
Underinflated tyres
Failed/failing sensors (e.g. maf, temp, lambda)
incorrect ignition timing
Just a general health check really, start with cheap/free things, then see how your economy goes. But your driving style affects it most!
A few things can cause poor fuel efficiency:
Binding brakes
Underinflated tyres
Failed/failing sensors (e.g. maf, temp, lambda)
incorrect ignition timing
Just a general health check really, start with cheap/free things, then see how your economy goes. But your driving style affects it most!
Clodo
Club Member
Yeah I know it's a mot fail but read so many different things about them some saying there legal and some saying not..... Didn't want to risk it just In case Hmmm I dunno as you still have the first cat.... But at the same time you can buy full decat systems.... Mehh I dunno might be worth just popping into a local station to check for certain
x
Enuo
Glorified Electrician
DIZZY micras have 2 cats, as long as one remains its legalYeah I know it's a mot fail but read so many different things about them some saying there legal and some saying not..... Didn't want to risk it just In case Hmmm I dunno as you still have the first cat.... But at the same time you can buy full decat systems.... Mehh I dunno might be worth just popping into a local station to check for certain
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skymera
Brutal Honesty
I think they have one.Coilpack micras have 2 cats, as long as one remains its legal
Centre pipe has a built in silencer.
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I would have thought an mot place would just check that there is A cat fitted and that it works enough to show good emissions reading.
Would have thought insurance would be worst for trouble if not declared and they find it after an accident. They might try an use that to avoid paying out?
You could always replace both cats with a high flow sports cat as long as it passes emissions?
Decat completely as far as I know is an mot fail therefore technically illegal for road use, if you got pulled over and for some reason they took you to the neerest mot test place and asked them to test it it would fail. Could be wrong but at least if I view it that way it puts me off doing mods you have to change back at test time etc
Would have thought insurance would be worst for trouble if not declared and they find it after an accident. They might try an use that to avoid paying out?
You could always replace both cats with a high flow sports cat as long as it passes emissions?
Decat completely as far as I know is an mot fail therefore technically illegal for road use, if you got pulled over and for some reason they took you to the neerest mot test place and asked them to test it it would fail. Could be wrong but at least if I view it that way it puts me off doing mods you have to change back at test time etc
Jack the front off car away up undo 2 spring loaded bolts put a bit off boxsection up in2 cat and harmmer the end off it p/s ul need safety glass's lol the front cat has near a inch off honey comb like crap in it holding gases back car seems sharper after I done this tho u don't notice it as much unless u have sporty back box on
Enuo
Glorified Electrician
With 4 branch and almera airbox, second cat still attached. Removing it gives 1.2 more hp according to Jody
