Which Cat

[Guest sandy77uk]

Which cat for a Zetec blacktop to get through the most stringent emmisions at IVA?

[Guest mower man]

Don't use a Siamese ,they are awkward and nasty, realy I don't know but just couldn't resist it ,others will know mower man

[Guest gdc]

gbs made me a silencer and cat in one, cat worked fine but noise was 2 db above limit

a baffle worked on retest having said that my main ex tube is 2 inch so mayby that was the prob as my manifold exits at 2 inch and gave resonence .very reasnoble cost also for the whole thing .

graham

[Guest sandy77uk]

gbs made me a silencer and cat in one, cat worked fine but noise was 2 db above limit

a baffle worked on retest having said that my main ex tube is 2 inch so mayby that was the prob as my manifold exits at 2 inch and gave resonence .very reasnoble cost also for the whole thing .

graham

 

I always do a search before posting and a few came up mentioning the GBS cat and struggling to hit both noise and emissions, hence my asking which one would be a good one

 

Mower man, stick to building cars fella ;)

[Guest gdc]

emmisions were fine but a couple of dbs on noise to high , the baffle worked and i am pleased .

poss reason my noise was high is that i run a 50mm bore into the ex .

graham