Cossie
Member
Registered: 17th May 02
User status: Offline
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Do i do any harm to engine or cat converter if i remove it ?
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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no
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Cossie
Member
Registered: 17th May 02
User status: Offline
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also will exhaust come out from the pipe as i removed the valve ?
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joes_1.4_16v_sport
Member
Registered: 15th Mar 07
Location: Preston, LANCS
User status: Offline
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unless you get a plug // to blank it off... Yes.
Mine does but not even a little... If you get a mate to red line it once or twice you can see abit of smoke but under idling... No nothing comes out...
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corsa_rob
Member
Registered: 22nd Jan 06
Location: Birmingham
User status: Offline
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why get rid of it? and whats its real purpose? lol
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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real perpos = to assist in warming the engine up when engine starts from cold.
and go get a 4-1 or 4-2-1 manifold for it.
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corsa_rob
Member
Registered: 22nd Jan 06
Location: Birmingham
User status: Offline
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awww so i dont really need mine as its run for 5 mins before any journey
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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nope never really need it, but i wouldnt run without it if you dont have a manifold with the hole blanked up tho, as its still a bit naughty and looking at the way the old manifold on my X14XE was it all links up to that hole.
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fuju64
Member
Registered: 17th Aug 06
Location: Bristol
User status: Offline
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it assists warming the cat up on a cold start not the engine doesnt it?
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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cat will be warmed up by the exhaust gasses, but engine will need warming up as it wont atomise the fuel properly,
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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quote:
Originally posted by Richardhhha
real perpos = to assist in warming the engine up when engine starts from cold.
no it doesnt. it introduces fresh air into the exhaust to give better exhaust emmissions during warmup to comply with regulations. it doesnt warm anything up at all.
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Cossie
Member
Registered: 17th May 02
User status: Offline
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Today I put back again the Secondary air valve and pump back so for now ok hopefully I will remove them completley when I do a new exhaust manifold but I need money 
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Ellis
Member
Registered: 11th Sep 07
Location: Aberdeenshire
User status: Offline
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Mine stinks when it's cold, no air pump, would that be why then?
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V-Man
Member
Registered: 7th Feb 05
Location: Iwade, Sittingbourne
User status: Offline
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"the secondry air intake system introduces air into the exhaust manifold... increasing the combustion of hydrocarbons (better emmissions) and also increases the exhaust gas temperature therefore heating the cat quicker to reach its most effective operating temperature, quicker."
corsa book 
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corsa_rob
Member
Registered: 22nd Jan 06
Location: Birmingham
User status: Offline
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interesting cheers dave and v man
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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I have read that as well and its complete rubbish. Fresh air added into the exhaust system will in no way make the exhaust gasses hotter, I have used EGT probes to measure this myth and can confirm that the SAI system will make EGT (exhaust gas temperature) lower when it is switched on.
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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quote:
Originally posted by Dave A
quote:
Originally posted by Richardhhha
real perpos = to assist in warming the engine up when engine starts from cold.
no it doesnt. it introduces fresh air into the exhaust to give better exhaust emmissions during warmup to comply with regulations. it doesnt warm anything up at all.
stand corrected.
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