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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Photo/Video/Media Gallery > Single Turbo 335i with just a 3.5" downpipe



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      05-11-2013, 06:48 PM   #23
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      05-11-2013, 07:32 PM   #24
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Quote:
Originally Posted by Roy Cormier View Post
My main goal for now was to replace the stock turbos that smoked, i don't want to be the first to blow one up since this is my DD, so I'll watch the HP/TQ progress of others and turn it up from there. I still need to test out my ideas on tuning with the external WG.
its funny you say DD...do you DD it now? Because this whole time I was thinking its been sitting at your house for a while.

anyway this is awesome as i want to get into fabrication myself....glad to see some people are doing this on their own.

teach me please
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      05-11-2013, 07:51 PM   #25
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That turbo looks badass sitting like that. Subscribed
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      05-11-2013, 08:06 PM   #26
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      05-11-2013, 08:50 PM   #27
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I welded up about half of the exhaust today, fixed most of the exhaust leaks, and got a muffler on the car. Its' a bit quieter but still way louder than I was hoping for. But with 3.5" exhaust I guess I'll just have to deal with it. I've still got 2 fairly large leaks to take care of, but I've run out of welding gas again.





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If you can leave black marks on a straight from the time you exit a corner till the time you brake for the next turn....... Then, you have enough horsepower.

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      05-11-2013, 10:51 PM   #28
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This is awesome, what will you be using to tuning?
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      05-12-2013, 09:10 PM   #29
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This is awesome, what will you be using to tuning?
I've got a Cobb AP for now, boost control still needs to be figured out. If I can't make it work with just that, then I might build some hardware to control boost and deal with the DME.

I was thinking about designing a vacuum controlled external wastegate in Solidworks, but that seems like too much work at this point, modifying one of my existing WGs would be easier. I've got a few ideas to try whenever I get some motivation to work on the car again.
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      05-12-2013, 09:31 PM   #30
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Loving the sound! Can't wait to hear for a freeway pull with this setup!

Keep the Cobb, get a Turbosmart/AEM boost-controller gauge, and run a Tial external wastegate. With so much work done already,why cheap on stock wastegates?
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      05-12-2013, 09:32 PM   #31
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Well now I got this crazy idea in my head that I can make one of these external gates work off vacuum rather than boost. I just ripped one apart and I think I might be able to make this work, I'll have to do some experimenting with springs though.

I'd probably have to recirculate it into the exhaust too, because I have a feeling it'd be open more than i'd like.
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      05-13-2013, 11:06 AM   #32
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This guy remembers me of the performance version of blueaudi aka the custom poormansm3 bodywork but performance haha. goodluck!
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      05-13-2013, 01:39 PM   #33
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I'm not looking to actually use the stock wastegates in any way, just the stock wastegate solenoids. To control modified external wastegates via vacuum (or a single WG with two pipes separated up to the valve seat).

It'll either work or it won't, since it seems no one has tried yet I might as well find out.
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      05-13-2013, 02:39 PM   #34
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+1000
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      05-22-2013, 04:35 PM   #35
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nice, like to see where these engines will be in the next few years, oooo baby!
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