standard system de-cat'ing

[r-reg-sr]

i am about to de cat my standard system, as i have a full spare one lying around.
so one may be used for mot time, if needed for emissions-which i doubt it would
what am i looking at ? knock out both the cat converters and done - refit with gun gum thats it ?

 

[frank]

i am about to de cat my standard system, as i have a full spare one lying around.
so one may be used for mot time, if needed for emissions-which i doubt it would
what am i looking at ? knock out both the cat converters and done - refit with gun gum thats it ?

yes z, ram them out with a rod, and weigh in the crumbs

 

[r-reg-sr]

ram+crumbs yes. had to :grinning:grinder up the exhaust that was on the car to remove it :grinning: good laugh it was
left the first cat and manifold tied on and started hitting it:grinning: hammer drill and long bit helped pull the metal rag out too:grinning:

sensor visible

second catlelist

 

[r-reg-sr]

feels like the exhaust is going out now:grinning:
gun gum sealed it all up

 

[tomwest]

hang on a sec. is that a second cat? thought it went in order cat, mid silence, back box. has drilling the cat out given you any performance benefit?

 

[r-reg-sr]

pre-facelift models have the manifold cat downpipe then a mid cat then a cherry bomb looking one then silencer
i had a straight out silencer, then remember'd the whole point in why i like jap is the quite smooth power they have always had.
so i put the silenced back box back on. yeh power wise you feel a restriction has gone and get a real nice butterfly fluttering noise from the empty chambers!

 

[tomwest]

cheers mate. think i'll go for it. not running an air filter, jsut put in bosch super 4s gapped to 2.2mm sounds proper rorty now!

 

[kipsy]

Gapped my iridium plugs to 1.1 mm. 2.2 sounds big. Are you running standard plug leads etc? Maybe the Bosch plugs work differently to mine. What's the next performance mods(Y)

 

[r-reg-sr]

pre-facelift models have the manifold cat downpipe then a mid cat then a cherry bomb looking one then silencer
i had a straight out silencer, then remember'd the whole point in why i like jap is the quite smooth power they have always had.
so i put the silenced back box back on. yeh power wise you feel a restriction has gone and get a real nice butterfly fluttering noise from the empty chambers!

let me correct that
pre-facelift k11 , manifold, first cat, mid cat , cherrybomb looking silencer, back box silencer