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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > DIY exhaust Golf Tee Mod? Anyone?



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      01-09-2006, 01:19 PM   #1
youngtechman
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DIY exhaust Golf Tee Mod? Anyone?

Anyone done a "Golf Tee Mod" on E90?
is it easy? how is it sound?
I want to know if I disconnect the line, will the exhust flap stay always open even under low RPM?

Thanks
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      01-10-2006, 01:24 AM   #2
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Quote:
Originally Posted by youngtechman
Anyone done a "Golf Tee Mod" on E90?
is it easy? how is it sound?
I want to know if I disconnect the line, will the exhust flap stay always open even under low RPM?

Thanks
Check www.e46fanatics.com. The e46 330 had the same mechanism and for the e46 330 members to upgrade exhausts they had to do the golf tee mod. Im 99% sure the e46's golf tee mod will work on the e90. Good luck
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      01-12-2006, 09:05 AM   #3
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what is a golf tee mod ?..
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      01-12-2006, 03:53 PM   #4
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check out siriusinvestor's thread on "my new eisenman exhaust"...
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      01-12-2006, 03:58 PM   #5
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this may help.....from another thread...
"It is a common free mod to disconnect the hose. I did it to may e46 330 and will do it when I get my e90. The flap stays closed at lower RPM's. When you deactivate it, the sound is deeper/louder at idle and low speeds. It opens at higher RPM's to reduce backpressure so power is not reduced. The vehicle electronics don't know if it is connected or not.

Just make sure not to create a vacuum leak -- so seal up the hose end tightly by (typically) using a golf tee with a tie-strap tight around the end of the hose, then maybe even a wrap of tape over that. Strap the end of the hose up out of the way and you're all set to go.

Aftermarket exhausts are trying to give a better sound at all RPM's (and don't have to meet government imposed sound regulation), so there is no reason for them to add a valve that lowers the sound level and increases power robbing backpressure."
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      07-07-2008, 12:56 PM   #6
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Quote:
Originally Posted by Chesmu View Post
this may help.....from another thread...
"It is a common free mod to disconnect the hose. I did it to may e46 330 and will do it when I get my e90. The flap stays closed at lower RPM's. When you deactivate it, the sound is deeper/louder at idle and low speeds. It opens at higher RPM's to reduce backpressure so power is not reduced. The vehicle electronics don't know if it is connected or not.

Just make sure not to create a vacuum leak -- so seal up the hose end tightly by (typically) using a golf tee with a tie-strap tight around the end of the hose, then maybe even a wrap of tape over that. Strap the end of the hose up out of the way and you're all set to go.

Aftermarket exhausts are trying to give a better sound at all RPM's (and don't have to meet government imposed sound regulation), so there is no reason for them to add a valve that lowers the sound level and increases power robbing backpressure."
++1
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      11-20-2013, 10:03 PM   #7
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      11-21-2013, 06:00 AM   #8
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It's really easy, just take a look at the pics below.

I tested it and it does keep the flap open all the time, for the first couple of days I liked the extra exhaust drone, but eventually decided to just put it back to normal. Was actually testing this to hear if it was the exhaust flap that was causing a rattle sound that I have been battling with - it didn't...

It'll probably record an error code, but no errors on the cluster etc.

Had a quite poke around and it's exactly as per these pics:







Edit: found this pics a while back on this or another forum.
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      11-21-2013, 01:28 PM   #9
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It does have it on the E90, and everyone has explained it so....

+1 for golf tee mods!
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