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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 > N54 /Borg Warner s375 Fitment ?



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      01-09-2013, 08:07 PM   #1
Pocket4077
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I have a s375 from a old project sitting around . Would like to go single turbo one day .just wanted to know if this turbo is to big to use ? Any info would be appreciated .
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      01-10-2013, 10:47 AM   #2
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What are the specs on the exhaust side? I had two single-turbo 3.0L S475 cars that were pretty laggy (full boost @ 4500RPM), but that was with a T6 exhaust side & 1.10 A/R. The S300s are great turbos.

I'm going to be putting either an S366 or S372 on my 335i next month, from what I've seen on other cars I think it'll work well.
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      01-10-2013, 12:26 PM   #3
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Quote:
Originally Posted by Roy Cormier
What are the specs on the exhaust side? I had two single-turbo 3.0L S475 cars that were pretty laggy (full boost @ 4500RPM), but that was with a T6 exhaust side & 1.10 A/R. The S300s are great turbos.

I'm going to be putting either an S366 or S372 on my 335i next month, from what I've seen on other cars I think it'll work well.
T4 1.01 divided housing ... What manifold do you plan on using ? I just wanted to kno if this turbo will fit in our engine bay with a single turbo manifold .
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      01-10-2013, 12:54 PM   #4
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Quote:
Originally Posted by Pocket4077 View Post
T4 1.01 divided housing ... What manifold do you plan on using ? I just wanted to kno if this turbo will fit in our engine bay with a single turbo manifold .
More than likely you'll need to run a top mount setup and do some relocating to fit it. Vargas Turbos sells exhaust flanges so you'll just need to have the rest of the mani fabbed up. I've seen this done before(although with just a 35r) and, apparently, it works really well.
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      01-10-2013, 02:01 PM   #5
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T4 1.01 divided housing ... What manifold do you plan on using ? I just wanted to kno if this turbo will fit in our engine bay with a single turbo manifold .
I'd think that'd work fairly well. I made my own manifold. I haven't done much looking at the space underneath the motor, but theres enough room up top if you move some things out of the way. I'd assume you could find some room underneath also. Depending on which compressor cover you have it could be a really tight fit. All of the Borg Warner turbos I've used had massive compressor covers compared to others.

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      01-11-2013, 12:44 AM   #6
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Certainly an apples/oranges comparison but on my RB26 powered Z on full E85 I made 718rwhp/586rwtq around 25psi. Engines are similar in size but the intake/ITB setup on the rb26 works realy well!

I would stay away from anything above the 70 range on compressor sizes. The uning we have here would fit in well with somethnig like the BW 91/79

Something large like you have is going to be a hurry up and wait for power scenario
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