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35iS exhaust side
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- Newbie
- Posts: 2
- Joined: Thu Aug 17, 2017 3:40 pm
35iS exhaust side
Hi everyone.
Excuse my ignorance but with the split exhaust on the 35i and 35iS do both tail pipes work all the time or does it switch from one to both when things are ramped up?
Just curious!
Thanks
Excuse my ignorance but with the split exhaust on the 35i and 35iS do both tail pipes work all the time or does it switch from one to both when things are ramped up?
Just curious!
Thanks
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- Lifer
- Posts: 8202
- Joined: Tue Oct 26, 2010 2:52 pm
35iS exhaust side
So it's a true dual exhaust, one per bank of 3 cyls.
One has a flap that opens and closes to reduce noise emissions largely at start up.
One has a flap that opens and closes to reduce noise emissions largely at start up.
- Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
35iS exhaust side
I thought the flap opened at start up to make it sound more growley
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
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- Member
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- Location: Was Reading, now Sydney
35iS exhaust side
Cool, had no idea! Now I know
2013 E89 35iS Mineral White
19" 326M | heated seats & wheel | pro nav & hifi | stubby
Gone: 2010 E89 23i Space Grey
19" 326M | heated seats & wheel | pro nav & hifi | stubby
Gone: 2010 E89 23i Space Grey
- Zed Five
- Senior Member
- Posts: 2290
- Joined: Thu Aug 20, 2009 1:58 pm
35iS exhaust side
On start up, both will be ooen
on warming up, just the left side will be open.
Driving, it'll be adaptive.
on warming up, just the left side will be open.
Driving, it'll be adaptive.
Why is it that people who can't take advice always insist on giving it?
E89 35is | BMW S1000rr Motorsport Ed.
E89 35is | BMW S1000rr Motorsport Ed.
- Diego_F
- Newbie
- Posts: 18
- Joined: Mon May 14, 2018 11:27 am
35iS exhaust side
I'm interested in that. How can I check if my rigth exhaust flap is working? I've never seen it closed and maybe the previous owner did something in that way to be always open.
2012 E89 sDrive35is Black Sapphire
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- Newbie
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- Joined: Thu Aug 17, 2017 3:40 pm
35iS exhaust side
just have a look underneath at the (drivers side exhaust in the UK) if the little hose is connected - once you get under it's quite obvious
- Nick9one1
- Member
- Posts: 299
- Joined: Thu Dec 28, 2017 12:48 am
- Location: Newark, Nottinghamshire
35iS exhaust side
I thought the flap was closed on a cold start to reduce noise? My flap doesn't work and it sounds like it has a blowing exhaust for about 20-30 seconds until the idle comes down.
Another similar thread just started here - viewtopic.php?f=23&t=105901&p=1542990#p1542990
You should be able to move the arm with your finger - https://photos.app.goo.gl/ZE5YJAyFpj8p24jd2
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
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- Lifer
- Posts: 8202
- Joined: Tue Oct 26, 2010 2:52 pm
35iS exhaust side
They frequently fail, leaving a rattle or not working at all. I’m on my second and even that’s Jerry rigged with a spring to help it close. German rubbish.
- Nick9one1
- Member
- Posts: 299
- Joined: Thu Dec 28, 2017 12:48 am
- Location: Newark, Nottinghamshire
35iS exhaust side
I've just found a much better solution to remove the 'rasping'/'hole in exhaust' sound at startup.
http://mhdtuning.com/
Very highly rated on other BMW forums, especially 3 series related. It's only for N54's/N55's though.
Now I'm running the golf tee mod and these options;
The cold start noise reduction works better than I expected. Very happy
http://mhdtuning.com/
Very highly rated on other BMW forums, especially 3 series related. It's only for N54's/N55's though.
Now I'm running the golf tee mod and these options;
The cold start noise reduction works better than I expected. Very happy
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
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- Lifer
- Posts: 8202
- Joined: Tue Oct 26, 2010 2:52 pm
35iS exhaust side
That looks interesting. Can anyone point me to the two cables they state are required? (eBay?)Nick9one1 wrote: ↑Tue May 15, 2018 4:51 pm I've just found a much better solution to remove the 'rasping'/'hole in exhaust' sound at startup.
http://mhdtuning.com/
Very highly rated on other BMW forums, especially 3 series related. It's only for N54's/N55's though.
Now I'm running the golf tee mod and these options;
The cold start noise reduction works better than I expected. Very happy
Screenshot_20180515-113541_preview.jpeg
- Diego_F
- Newbie
- Posts: 18
- Joined: Mon May 14, 2018 11:27 am
35iS exhaust side
I asked already in the other thread. Is that video opening the flap when pushing up the lever or closing it? Mine is open when engine is off or at idle.Nick9one1 wrote: ↑Tue May 15, 2018 2:39 pm
You should be able to move the arm with your finger - https://photos.app.goo.gl/ZE5YJAyFpj8p24jd2
2012 E89 sDrive35is Black Sapphire
- Nick9one1
- Member
- Posts: 299
- Joined: Thu Dec 28, 2017 12:48 am
- Location: Newark, Nottinghamshire
35iS exhaust side
Yep I replied to your thread earlier.
The flap defaults to open when the engine is off. you push the arm to close it.
The flap defaults to open when the engine is off. you push the arm to close it.
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
- Nick9one1
- Member
- Posts: 299
- Joined: Thu Dec 28, 2017 12:48 am
- Location: Newark, Nottinghamshire
35iS exhaust side
This is the main cable you need. Some have a small switch on top, but you shouldn't need it for the Z4. It bridges pins 8 & 9, making it work with older BMW's.Maniac wrote: ↑Tue May 15, 2018 5:04 pmThat looks interesting. Can anyone point me to the two cables they state are required? (eBay?)Nick9one1 wrote: ↑Tue May 15, 2018 4:51 pm I've just found a much better solution to remove the 'rasping'/'hole in exhaust' sound at startup.
http://mhdtuning.com/
Very highly rated on other BMW forums, especially 3 series related. It's only for N54's/N55's though.
Now I'm running the golf tee mod and these options;
The cold start noise reduction works better than I expected. Very happy
Screenshot_20180515-113541_preview.jpeg
https://www.ebay.co.uk/itm/For-BMW-INPA ... SwrIlaw9iZ
This is the second cable
https://www.ebay.co.uk/itm/Micro-USB-Ho ... xyeZNTVRfU
The app come in two parts. The flasher module (main app) is £89 which allows you to flash a stock map and fiddle with the options you can see in the screenshot.
Then there are additional Stage 1, 1+, 2, 2+ maps available at about £50.
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
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- Lifer
- Posts: 8202
- Joined: Tue Oct 26, 2010 2:52 pm
35iS exhaust side
Fab thanks.
Mainly want it for logging to get to the bottom of my engine injector issues. Then it’s playtime because frankly why not.
Mainly want it for logging to get to the bottom of my engine injector issues. Then it’s playtime because frankly why not.