my car failed its mot on emissions recently and I put a new cat on it today.When i held up the old one to the light I couldnt see anything through it at all, it must have been restricting the car big time cos when I put the new cat on I took it for a spin down the road and,,,WOW!! loads more power.
Cant wait to take it out for a proper burn later

 

I didnt think you could look through a new catalytic convertor... isnt there a filter in there that blocks the passageway?

 

no, theres a honeycombe structure inside thats made up of cells of precious metals, its wiered looking through it but yeah you can see through it just about

 

haha I expected this post to be abouta cat... (feline lol). But wow, how the h*ll did ur cat get that bad? how many miles on your civic?

 

its T reg and has done about 133k, the person i bought it off didnt know bugger all about cars and their upkeep though so he prob just let it deteriorate. LOL my name for the post worked then? (miaow!)

 

you put a high-flow cat in?

 

dont know what a high flow cat is, is that like one of the performance types? with less cells than standard or something?
as far as i'm aware the one i bought is just bog standard, it was the cheapest one i could find online @ £86 including delivery (honda quoted me £600 +)

 

if you can see through it, it might be a high flow cat, just as long as you have at least some combs in theere. If you dont, you will fail emmissions.

 

If the car runs rich unburned fuel will make its way to the cats. Those things can get red hot and if fuel touches the honeycomb on the inside while its hot like that it will melt and block it up.

 

wow, i never knew you could do that, I know that a cat can get hot, but i never thought that you could melt one...