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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > changing impeller or upgrading turbos?



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      02-16-2009, 09:41 PM   #1
lamia2super
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changing impeller or upgrading turbos?

has anyone thought of changing the impeller of the stock turbos and coming up with a tune for it? instead of changing the turbos. any new news about the turbo upgrades for the 335i?
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      02-17-2009, 11:28 AM   #2
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^ read few thread above yours......
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      02-17-2009, 02:26 PM   #3
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Search would have been useful here
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      02-17-2009, 04:00 PM   #4
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What's even funnier is the OP is in Miami, too...
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      02-17-2009, 04:38 PM   #5
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i knew it was here and i knew about it iv already been to asr. i just wanted to know if theirs anything else and i wanted to get your opinions. also i haven't heard of anyone posting gains and tunes for changing the impeller of the stock turbos. plus theirs talk about the asr turbo being around 5000 i figure it will just be better changing the impellers
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      02-17-2009, 05:20 PM   #6
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i want to know if any company is fixing up the stock turbos instead of changing them. if they have come up with any tunes. and what are the gains and how much???
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      02-17-2009, 05:30 PM   #7
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Looks like they'll be the first. No one else has offered any modified turbos for sale yet, let alone done any dynos. Down4it is getting turbos modified, too, but not sure who is doing the work. Stay tuned...
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      02-17-2009, 08:17 PM   #8
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so no one has changed the impeller and portd the stock turbos yet? well then i guess i just have to wait

and i so want to modify my turbos
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      02-17-2009, 08:28 PM   #9
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Down4it did mod his stock turbo's he just got them back yesterday and i think is putting them on today but no dyno's yet check n54tech
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      02-17-2009, 09:01 PM   #10
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Someone had them on their website - $2k + core. Wasn't it GT Pro?

Found it: http://www.boostedbimmers.com/turbokits.html
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      02-17-2009, 09:18 PM   #11
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thts a little pricey for modded 335i turbos dont you think??
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      02-18-2009, 10:49 AM   #12
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Quote:
Originally Posted by lamia2super View Post
has anyone thought of changing the impeller of the stock turbos and coming up with a tune for it? instead of changing the turbos. any new news about the turbo upgrades for the 335i?
The factory mitsubishi cartridge is poorly designed from factory. The problem is that the impeller is already too big for the stock turbine wheel along with a week shaft design. Putting a larger compressor wheel will only exasperate the problem and overspin the turbine even further, creating a less efficient turbo. Putting a larger compressor wheel simply will not work for this application. This is based on compressor map info and turbine pressure data we have collected.
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      02-18-2009, 12:57 PM   #13
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Quote:
Originally Posted by lamia2super View Post
i knew it was here and i knew about it iv already been to asr. i just wanted to know if theirs anything else and i wanted to get your opinions. also i haven't heard of anyone posting gains and tunes for changing the impeller of the stock turbos. plus theirs talk about the asr turbo being around 5000 i figure it will just be better changing the impellers
Hypothetically....the 5,000 should include all the fittings...PROcede and turbos attached to custom built manifolds as well as support...

I think 5k sounds like a fair price. Also for PROcede owners you can probably subtract about 1k

I am excited to hear about the final work on pricing in the next few weeks, also the results of Shiv heading to FL for tuning of the kit.


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