ISO advice for Single Turbo conversion

Mason_Shopperly · 09-16-2023, 06:17 PM

Recently found a nice spec in an E89 Z4 35is with the N54 and the DCT and a single turbo conversion in mind.

I like what I’m hearing about Speedtech Kits but I’m trying understand the differences in the engine bay of an N54 Z4 as opposed to the 135i and 335i.

I have read about needing custom downpipe to connect up to the stock z4 exhaust, relocation of coolant tank, relocation of water pump, relocation of radiator overflow bottle …

top-mount vs bottom-mount,

*Located in Canada

B21 · 09-17-2023, 10:14 AM

Will be interested to see how it goes..do I read correctly these are twin scroll designs ?

09-16-2023, 06:17 PM	#1
Mason_Shopperly Registered 2 Rep 4 Posts Drives: 2011 E90 BMW 335i X-Drive N55 Join Date: Feb 2020 Location: Calgary Alberta iTrader: (0)	Recently found a nice spec in an E89 Z4 35is with the N54 and the DCT and a single turbo conversion in mind. I like what I’m hearing about Speedtech Kits but I’m trying understand the differences in the engine bay of an N54 Z4 as opposed to the 135i and 335i. I have read about needing custom downpipe to connect up to the stock z4 exhaust, relocation of coolant tank, relocation of water pump, relocation of radiator overflow bottle … top-mount vs bottom-mount, *Located in Canada Attached Images
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09-17-2023, 10:14 AM	#2
B21 Captain 153 Rep 611 Posts Drives: E89 Atacama Yellow 35is Join Date: May 2022 Location: Scotland..God’s own country iTrader: (0)	Will be interested to see how it goes..do I read correctly these are twin scroll designs ? __________________ Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0 Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
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