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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Single turbo.



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      10-09-2018, 07:21 PM   #1
cmxenon
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Single turbo.

So, I just bought a 2009 335xi. Brand new valve cover gasket, oil pan gasket, and a few other things. Everything is in good condition as of right now. No wasgate rattle(yet) etc... I'm looking to go single turbo in the future, but I don't wanna spend a fortune. Can anyone give me a little bit more insight on this? Thank you!
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      10-10-2018, 11:54 AM   #2
nsjames
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they probably could in one of the engine forums.

this forum is for the AWD system specifically.
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      10-10-2018, 05:54 PM   #3
jeffzzz
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you'll blow your transfer case at around 550-600 whp based on some facebook/spool street posts i've seen
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      10-15-2018, 01:54 PM   #4
techwhiz
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Quote:
Originally Posted by cmxenon View Post
So, I just bought a 2009 335xi. Brand new valve cover gasket, oil pan gasket, and a few other things. Everything is in good condition as of right now. No wasgate rattle(yet) etc... I'm looking to go single turbo in the future, but I don't wanna spend a fortune. Can anyone give me a little bit more insight on this? Thank you!
Your profile says NY.
Based on what I know about Ca. and NY don't do the single.
Go with twins. NY like Ca, if I'm not mistaken does inspections for emissions equipment. You will fail a visual inspection.

A good set of twins is your answer.
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      10-17-2018, 05:50 AM   #5
cortez08
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Quote:
Originally Posted by jeffzzz View Post
you'll blow your transfer case at around 550-600 whp based on some facebook/spool street posts i've seen
Not true on a single turbo application. Upgraded engine mounts, poly bushings, and transfer case solid or poly mounts greatly increase strength of the x drive system. Highway pulls and rolls off anti lag are not a problem even at 650 whp with the upgrades I mentioned.

Now to your point if you are dumping the clutch at 5k on upgraded twins to get a killer 60 foot time, bad things are going to happen.
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      10-17-2018, 08:58 PM   #6
jeffzzz
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Quote:
Originally Posted by cortez08 View Post
Not true on a single turbo application. Upgraded engine mounts, poly bushings, and transfer case solid or poly mounts greatly increase strength of the x drive system. Highway pulls and rolls off anti lag are not a problem even at 650 whp with the upgrades I mentioned.

Now to your point if you are dumping the clutch at 5k on upgraded twins to get a killer 60 foot time, bad things are going to happen.
Oops, I should have specified stock lol
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      11-07-2018, 10:51 PM   #7
addictedtoboost
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Quote:
Originally Posted by jeffzzz View Post
you'll blow your transfer case at around 550-600 whp based on some facebook/spool street posts i've seen
I guess I will soon find out what happens to my transfer case since I am going ST bottom mount on my 335xi E92. I'm going with a GTX3582R running flex fuel e50 map most liekly along with a custom flex fuel single turbo tune. I am aiming for right around 600ish whp
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