Removal of secondary air injection/smog
07-14-2008, 06:24 PM
#31
Rennlist Member
Also, spray the injectors with Kroil or PB Blaster and let sit overnight. That will minimize the chance of a seized injector tearing up the threads (ask me how I know
).
Last edited by Metal Guru; 06-07-2018 at 10:33 AM.
07-14-2008, 08:03 PM
#32
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[QUOTE=Ag02M5;4342951]Passing emissions is not an issue for me 
Ryan what's your secret? Mine is due in August and I have tried in the past and failed the N2 test.
Ryan what's your secret? Mine is due in August and I have tried in the past and failed the N2 test.
07-14-2008, 08:18 PM
#33
Three Wheelin'
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07-15-2008, 03:34 AM
#34
Burning Brakes
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I successfully managed to get this system off; see my other thread for weight savings. To blank off the cat I used the nut from the old cat air connection and put a 10cents (euros) coins inside and refitted this to the cat. Perfect fit and about the cheapest mod I think I'll ever do!!
Steve
Steve
06-05-2018, 10:39 PM
#35
Rennlist Member
Do people just remove the belt from the smog pump to rid any power starvation from running the pump? I'm worried the CIS has the pump/air injection system included in how it "thinks", so shutting it down might cause a running issue.
06-06-2018, 12:50 AM
#36
Rennlist Member
IMO I think removing the emissions stuff and air pump can effect the cold start and idle mixture, If you remove all this stuff you will need to adjust the fuel mixtures, on a 965 it's a pain unlike a 930 which is much easier.
06-06-2018, 12:56 AM
#37
Rennlist Member
Regarding emissions. The air pump only works at startup cold temperatures. Its purpose was to dilute the mixture upon start up to reduce the amount of emissions the car gave off when cold. Once warm the air was vented out of the engine instead of mixing with the exhaust gases. In the 90's they used this pump to spool up the turbo to keep it on boost even at lower rpms for racing. Not very economical approach but effective.
06-06-2018, 03:07 PM
#39
Rennlist Member
Anyone know if no belt (pump not turning) could still affect cold start or any other running of the car? I'm thinking I should replace my belt to make it work again...
06-07-2018, 10:32 AM
#40
Rennlist Member
Your joking, right?
Actually, at changeover, the injection air is redirected from the exhaust ports to the cat.
The problem I found with the injection header is that condensation that sat in it perforated it pretty badly. With as much as I play with my engine, I didn't want the spaghetti tangle of hoses in my way so it's all gone.
Now if I owned an uber expensive 3.6, I'd have to keep that unsightly mess in place
Actually, at changeover, the injection air is redirected from the exhaust ports to the cat.
The problem I found with the injection header is that condensation that sat in it perforated it pretty badly. With as much as I play with my engine, I didn't want the spaghetti tangle of hoses in my way so it's all gone.
Now if I owned an uber expensive 3.6, I'd have to keep that unsightly mess in place
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Scott Dunavant (07-22-2022)
07-20-2022, 10:33 PM
#41
Rennlist Member
Want to finally remove this stuff. Can all the air hoses and the two valve cans all really come out? What a dream. What do people do with the mounting bracket for the o2 sensor coupling that's on top of the air pump? I'm looking at an M64.50 (3.6t)
Last edited by wicks; 07-20-2022 at 10:47 PM.
07-21-2022, 04:13 AM
#42
Burning Brakes
I used a (steel) wheel nut to blank the cat air injection port on my car bypass.
Careful with the spider work, the nut sections of the pipework that need to be backed out of the heads are pretty fine, and it will be easy to destroy them if they are seized (ask me how I know).
Things are much cleaner without all the crap in place.
Last edited by Megatron-UK; 07-21-2022 at 04:23 AM.
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Metal Guru (07-29-2022)
07-21-2022, 02:40 PM
#44
Last edited by fritz k.; 07-21-2022 at 02:41 PM.
07-21-2022, 04:09 PM
#45
Rennlist Member
Ahh interesting thanks for that. Now I’m wondering how those couplings are held on euro cars (if they didn’t have the A/I? Maybe there’s a bracket and I might also go so far as to change other bits like the engine tin with the hole and vac fittings so that it’s like the secondary air was never there.