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BMW 3-Series (E90 E92) Forum
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Oil Leaks and Turbo refurb
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07-28-2015, 05:24 AM | #23 |
Buy a 335 they said... It'll be fun they said...
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Drives: 2007 E92 335i
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Location: Melbourne, Australia
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07-28-2015, 06:54 AM | #24 |
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07-28-2015, 07:24 AM | #28 |
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08-02-2015, 12:17 AM | #30 | |
JDTuning
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Quote:
BatMoWheel is a definite no go, IIRC the gains were not only zero but the turbochargers were a little lazy to spool too. I am all for using local resources when it comes to the rebuilding of hardware or the fabrication of something from scratch, but I would be very cautious in increasing the size of the turbo compressor wheel above OEM specs. GCG actually did a 15T wheel upgrade for a Sydney based N54 owner a while back and the results were less than satisfactory... Without a properly matched turbine wheel to suit the increase in airflow the larger comp' wheel is capable of moving, you can end up with a situation where the turbos make no additional power up top, are slower to spool and worse yet are prone to compressor surge. I know a guy who knows a guy (sounds dodgy I know, lol) that has a lot of knowledge with regards the rebuilding of MHI turbochargers, whilst he is a small operator he knows his stuff as he has been around forever, but he might be somewhat more cost effective than ATP, GCG and the like. |
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08-02-2015, 12:51 AM | #31 | |
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