Cat replacement

[sapper]

I’m looking to put a CAT back in below the turbo , pretty sure I can get one to fit but will a 200 cell be sufficient.
Anybody out there that knows about catalytic converters?

[sapper]

Thanks Dom
I’ll go for the 100 cell
I can also get a lean map ready for MOT test.

[sapper]

QBee said:

Watching with interest, as the same mod crossed my mind too. Next question is where to site it, and how to fit it?

I put my car on the lift last night and I’m measuring today.
Hoping to find space below the turbo

[sapper]

https://www.ebay.co.uk/itm/Universal-100-Cell-High...

Think of using something like the above.
Under the turbo there is just enough room but I like the idea of alongside the sump as fitting would be easier.

[sapper]

spitfire4v8 said:

I made a removable cat up once for a car that was going to the continent .. fitted it at the side of the sump .. I'm not sure you'd get one under the turbo that's going to be of any use. In any case, the turbo will take a lot of heat from the exhaust gas so if you're expecting to pass emissions then use tricks with thermal lagging and ecu tweaks to get the exhaust gas as hot as poss ..

Which cat did you use? Did you use flanged pipe or U clamps?
I’ve got 3 maps available, currently no3 is set up for unleaded low Ron (continental use) I was thinking of getting it to run lean come MOT time. 1st map is full fat 2nd is eco run so it’ll be trial and error but fitting the cat could be enough. Unfortunately I don’t know enough about it yet so any advice welcome.

[sapper]

QBee said:

Photos would be brilliant - I am seeing Mat Smith in the next few days and would like to show him for an extra opinion, given that they get pretty hot.

Anthony there is 300mm available alongside the sump with 30mm either side of the exhaust.
So 20-25mm useable space. Exhaust is 75mm and there is a high flow cat on eBay that is 100mm wide. So basically will it be enough.

https://www.ebay.co.uk/itm/Universal-3-100-Cell-Hi...

[sapper]

sapper said:

Anthony there is 300mm available alongside the sump with 30mm either side of the exhaust.
So 20-25mm useable space. Exhaust is 75mm and there is a high flow cat on eBay that is 100mm wide. So basically will it be enough.

https://www.ebay.co.uk/itm/Universal-3-100-Cell-Hi...

[sapper]

spitfire4v8 said:

Mick, you could do worse than give these guys a call .. not far from you

http://www.bmcatalysts.co.uk

Thanks I’ll do that