cat bypass pipes....
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Originally Posted by Jeffs' date='Oct 14 2005, 07:50 PM
[quote name='gasterus' date='Oct 14 2005, 06:49 AM'][quote name='Jeffs' date='Oct 14 2005, 02:15 AM']I was wondering if anyone had their catalytic converter removed. I tried searching around but could not find any manufacturer who sells it for the e60. Local exhaust shops won't do ir because they tell me it may well fail emissions and hence illegal. I asked fabspeed who did my old cayenne cat delete pipes and they say they could do it but they specialize in Porsches specifically. Anyone here has done that or anyone know any exhaust shop near your area who can sell me one of those???
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Hi, the E60 545ci has the catalytic converter build into one unit with the exhaust manifold. There is no way a muffler shop can cut the catalytic section and join it with a straight pipe. Furthermore, there is a few of the lamba proxy wiring connected to the catalytic to send information to the DME unit. Your engine might not functioning properly if you bypass the catalytic converter. You can upgrade to Racing dynamic competition exhaust manifold and 100-cell catalytic converter, plus they will provide you with an upgraded DME maximized your engine performance along with the manifold&catalytic upgrade. Hope this helps
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If you want a louder exhaust you can bypass the front and center muffler/resonator!
yo...selamat datang ke e60.net.
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http://www.racdyn.com/Localized/Internatio...t_E60_Motor.htm
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[/quote]Terima Kasih!
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#12
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Originally Posted by 6spdMan' date='Oct 14 2005, 03:05 AM
[quote name='Jeffs' date='Oct 14 2005, 03:53 PM']Sorry but I do not get what u are saying. Hmmm...I am assuming by looking at the caalytic converter it 's the same as my Cayenne cats. u basically cut the cats out and custom make pipes right???? No one has done this before? Headers are an option I am still considering
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It'll probably be cheaper (and a lot more effective) to install a set of headers and race cats if you intend to return your car back to a stock condition before getting rid of it.
Apparently, all european ecu's from 2001 onwards are designed to work better with cats installed, so just tossing the cats on new cars actually has a deleterious effect on horsepower. torque and fuel consumption. That's why I'm getting the race cats put in to my headers as soon as HIOP releases them.
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[/quote]Hello 6spdMan,
You are saying that you have an aftermarket header installed on your 530i without the catalytic converter? Can the engine operate normally in such manner, because from what I know BMW usually place a pair of oxygen sensor before and after the catalytic convertor, if this sensors are being plugged out I assume the DME will get confused. Please give me more info of your experience as I am also planning to upgrade my exhaust header on my 645ci, thanks
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#13
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Originally Posted by Jeffs' date='Oct 14 2005, 02:15 AM
I was wondering if anyone had their catalytic converter removed. I tried searching around but could not find any manufacturer who sells it for the e60. Local exhaust shops won't do ir because they tell me it may well fail emissions and hence illegal. I asked fabspeed who did my old cayenne cat delete pipes and they say they could do it but they specialize in Porsches specifically. Anyone here has done that or anyone know any exhaust shop near your area who can sell me one of those???
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I scanned what's above. But, did not see warranty mentioned. Are you concerned about your warranty? I would predict that if you do the things you are talking about that you will have warranty problems. I am going with no more than Dinan eventually offers and having my dealer, a Dinan certified shop, do the installation.
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Originally Posted by gasterus' date='Oct 15 2005, 11:18 AM
Hello 6spdMan,
You are saying that you have an aftermarket header installed on your 530i without the catalytic converter? Can the engine operate normally in such manner, because from what I know BMW usually place a pair of oxygen sensor before and after the catalytic convertor, if this sensors are being plugged out I assume the DME will get confused. Please give me more info of your experience as I am also planning to upgrade my exhaust header on my 645ci, thanks![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
You are saying that you have an aftermarket header installed on your 530i without the catalytic converter? Can the engine operate normally in such manner, because from what I know BMW usually place a pair of oxygen sensor before and after the catalytic convertor, if this sensors are being plugged out I assume the DME will get confused. Please give me more info of your experience as I am also planning to upgrade my exhaust header on my 645ci, thanks
![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
If your V8 has pre and post cat sensors, then make sure you get race cats put in when you install your headers. V8 headers are gonna be extremely expensive, and take a lot longer to install than for 6 cylinder cars.
Good luck with your header install..
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Originally Posted by 6spdMan' date='Oct 15 2005, 06:30 AM
[quote name='gasterus' date='Oct 15 2005, 11:18 AM']Hello 6spdMan,
You are saying that you have an aftermarket header installed on your 530i without the catalytic converter? Can the engine operate normally in such manner, because from what I know BMW usually place a pair of oxygen sensor before and after the catalytic convertor, if this sensors are being plugged out I assume the DME will get confused. Please give me more info of your experience as I am also planning to upgrade my exhaust header on my 645ci, thanks![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
You are saying that you have an aftermarket header installed on your 530i without the catalytic converter? Can the engine operate normally in such manner, because from what I know BMW usually place a pair of oxygen sensor before and after the catalytic convertor, if this sensors are being plugged out I assume the DME will get confused. Please give me more info of your experience as I am also planning to upgrade my exhaust header on my 645ci, thanks
![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
If your V8 has pre and post cat sensors, then make sure you get race cats put in when you install your headers. V8 headers are gonna be extremely expensive, and take a lot longer to install than for 6 cylinder cars.
Good luck with your header install..
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[/quote]Thanks for the info 6spd
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Bottom line is that there is a beautiful V-8 note hidden somewhere in the 545 emission system that the Remus, B&B, SuperSprint, et al are not revealing. On my 540, that was cured when the exhaust system did its own disconnect behind the cats. Sounded great until I had to hook it up again. On the 545, I'm thinking the best option might be to go straight after the resonators. The resonators are needed to control the constant hum at high speeds. This should be a pretty simple fix for many muffler shops that can custom make a couple of pipes.
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Originally Posted by JDN' date='Oct 15 2005, 09:39 AM
Bottom line is that there is a beautiful V-8 note hidden somewhere in the 545 emission system that the Remus, B&B, SuperSprint, et al are not revealing. On my 540, that was? cured when the exhaust system did its own disconnect behind the cats. Sounded great until I had to hook it up again. On the 545, I'm thinking the best option might be to go straight after the resonators. The resonators are needed to control the constant hum at high speeds. This should be a pretty simple fix for many muffler shops that can custom make a couple of pipes.
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There are 2 resonators(front and center) on 545i as well as 645ci. I have replaced the center resonator with a straight pipe and there is no changes to the character of the sound, sound level also remains the same. I have Eisenmann race muffler on my car, it sounds sportier than the stock muffler. But I dislike the throating sound the 645ci makes...it sounds like a old american V8. I do prefer the exhaust sound of the E39 540i, it has the trademark sound of a BMW V8.
I am considering either to have a header and catalytic upgrade from racing dynamics(claim 25hp increase but quite costly), or replace the front resonator with a straight pipe. Hopefully by changing the front resonator will eliminate the unpleasant sound of the throating exhaust. Somebody posted on the thread saying there is a exhaust valve on the front resonator that actually help to produce/control the throating sound, anyone has experience with this claim?
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Has anyone tried the replacing all their resonators on 645ci/545i? I need more info on how they sound
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My Ride: 2003 X5 3.0----->gone
2004 Porsche Cayenne S : Gemballa front and back bodykit, fabspeed bypass pipes, Gemballa exhaust pipes, full option, 20" factory sport design rims------>gone
2005 545i 6-spd manual---->de-badged, CDV removal, Autosolutions short shift kit, resonator removal, premium package, PDC, xenon, almost full options, hardwire V1 install ....looking for mods...
2007 550i 6-spd----> Premium package, sport package, Logic7, heated everything, Rogue Engineering SSK, CDV removal, hardwire V1 install, aFe cold air intake, Custom Magnaflow exhaust....
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Originally Posted by donv' date='Oct 15 2005, 12:57 AM
[quote name='Jeffs' date='Oct 14 2005, 02:15 AM']I was wondering if anyone had their catalytic converter removed. I tried searching around but could not find any manufacturer who sells it for the e60. Local exhaust shops won't do ir because they tell me it may well fail emissions and hence illegal. I asked fabspeed who did my old cayenne cat delete pipes and they say they could do it but they specialize in Porsches specifically. Anyone here has done that or anyone know any exhaust shop near your area who can sell me one of those???
[snapback]184061[/snapback]
I scanned what's above. But, did not see warranty mentioned. Are you concerned about your warranty? I would predict that if you do the things you are talking about that you will have warranty problems. I am going with no more than Dinan eventually offers and having my dealer, a Dinan certified shop, do the installation.
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[/quote]Yes, I am worried about warranty as well. Good thing is I have a mechanic friend who does good work on my cars. I am still worrried though. But since the car has on supercharger, I hope the chances of engine blowout or failure will be smaller...
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Originally Posted by gasterus' date='Oct 15 2005, 11:49 AM
Has anyone tried the replacing all their resonators on 645ci/545i? I need more info on how they sound ![Help](https://5series.net/forums/images/smilies/imported/help.gif)
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Originally Posted by JDN' date='Oct 15 2005, 02:02 PM
[quote name='gasterus' date='Oct 15 2005, 11:49 AM']Has anyone tried the replacing all their resonators on 645ci/545i? I need more info on how they sound ![Help](https://5series.net/forums/images/smilies/imported/help.gif)
![Help](https://5series.net/forums/images/smilies/imported/help.gif)
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[/quote]Ehm..so taking off the resonators just make additional hum...no change to the sound characteristic?
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In that case, I have to seriously consider changing the headers and catalytic. Checkout the exhaust sound on this Racing dynamic 645ci. Its has a V12 engine a upgraded exhaust system
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![Think](https://5series.net/forums/images/smilies/imported/think.gif)
Not sure that if my car will make the same noise after upgrading to your header and sport cats.
http://www.racdyn.com/Localized/Internatio...6_E63_Intro.htm