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      10-28-2018, 06:03 AM   #45
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3" Inlets + custom airbox

It goes without saying that all the fancy turbo hardware in the world isn't going to amount to much if you can't feed your compressor with the densest air possible. I literally spent months attempting an Alpina B3S-style setup before abandoning it for a much simpler solution you will see in the pics below, which keeps the water-tank in its stock location, while providing a full 3" of flow, enough for 350-400bhp per turbo with minimal pressure drop, along with an enclosed airbox feeding the R turbo with provisions for the stock breather and heater built-in , no messy VTA setup here!
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      10-28-2018, 06:07 AM   #46
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Cooling setup

And now, to turn our attention to the cooling system.. Since I wiped out a bearing and had to replace my stock oil cooler anyway, I ended up going with an OEM N55 water to oil cooler for faster warmup and less pressure drop. Of course this adds heat rejection into the coolant circuit, so I figured I would offset this somewhat with a CSF radiator and call it a day. But after studying the 1M/335is/PPK aux rad setup closely I came to the realization that the aux cooler uses EXACTLY the same heat exchanger as our stock oil cooler! Did a bit of thinking and decided it would be both easiest and best to run this in series with the N55 oil cooler, so that the coolant going into the oil cooler is a little bit cooler than that of the engine, basically trading off a bit of coolant-side effectiveness for oil-side capacity. I can always have a custom, higher-capacity heat exchanger made in the future, but preliminary testing has shown that oil temps are noticeably cooler with this setup already...
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      10-28-2018, 06:17 AM   #47
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Twin plate OEM-style clutch

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BSM 2010MY Euro 135i 6MT with many mods... Build thread below

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      10-28-2018, 06:22 AM   #48
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Misc Odds & Ends

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BSM 2010MY Euro 135i 6MT with many mods... Build thread below

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      10-30-2018, 11:04 AM   #49
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Wow this has gotten really interesting, can you convert those dyno numbers to HP/TQ for us? I wasn't sure if the nm ratings were a direct conversion in this case
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"Tobias" 2013 135i ///M-Sport 6MT Pure Stage 1 XDI 35 HPFP 404whp/440wtq
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      10-31-2018, 03:51 AM   #50
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Quote:
Originally Posted by Matticus91 View Post
Wow this has gotten really interesting, can you convert those dyno numbers to HP/TQ for us? I wasn't sure if the nm ratings were a direct conversion in this case

Dyno numbers are from 2016 with an entirely different setup. Here is what I am expecting with my current combo:

~580whp SAE @ 17.4psi on 93oct pump gas no meth, ~500lb-ft of torque
~635whp SAE @ 21.4psi on 93oct pump gas no meth, ~550lb-ft of torque
~750whp SAE @ 26.1psi on race gas, ~700lb-ft of torque
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      10-31-2018, 08:33 AM   #51
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That's going to be a beast!
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"Tobias" 2013 135i ///M-Sport 6MT Pure Stage 1 XDI 35 HPFP 404whp/440wtq
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      02-10-2019, 04:54 PM   #52
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All done finally!
And now to actually drive this thing!
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      02-11-2019, 03:25 PM   #53
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Looks great!
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