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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 > Single turbo reliability



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      11-08-2020, 07:07 PM   #1
avgn5x
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Single turbo reliability

I want to hear from REAL single turbo owners not people who heard of some guy on the internet lol. How reliable is a single turbo. I want more power but not tryna drop the subframe of an upgraded turbo decides to clap itself. Im really only looking for 500-600hp so i'm not tryna push my motor till rods get sent through the earth into china. anyway i'd love to hear from y'all!
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      11-08-2020, 10:41 PM   #2
woodex m.e.
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Originally Posted by avgn5x View Post
I want to hear from REAL single turbo owners not people who heard of some guy on the internet lol. How reliable is a single turbo. I want more power but not tryna drop the subframe of an upgraded turbo decides to clap itself. Im really only looking for 500-600hp so i'm not tryna push my motor till rods get sent through the earth into china. anyway i'd love to hear from y'all!
Well I have had a single turbo for two years and it's been great. When they say upgrade vacuum lines to wastegates, they aren't lying. It's only a matter of time before the basic kit lines fail an you are over boosting. Also you talking 600 at the crank or wheels? Cause "only" 500 or 600 can turn into more effort than you think. Depending on available fuel and budget and blah blah blah
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      11-09-2020, 01:16 PM   #3
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I have had 2 friends in my local BMW club who went single and they tried to pile in timing/boost early and added in all the stressors like rolling anti-lag, NLS, 93 octane+meth vs e85, did not have index12 injectors and most aren't on their original motors due to ringlands or conrod bearings. Small sample size and all that though

I ran on mmp twins and full e85 but kept boost low under 4k and never had an issue motor-wise. Their small single turbos (5862, 6062 respectively) would "out-spool" my twins because they wanted more a aggressive tune. I made 100whp more than them fwiw (500@22psi vs 625@28psi) so it wasn't strictly power issue.
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      11-29-2020, 12:18 PM   #4
avgn5x
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Quote:
Originally Posted by woodex m.e. View Post
Quote:
Originally Posted by avgn5x View Post
I want to hear from REAL single turbo owners not people who heard of some guy on the internet lol. How reliable is a single turbo. I want more power but not tryna drop the subframe of an upgraded turbo decides to clap itself. Im really only looking for 500-600hp so i'm not tryna push my motor till rods get sent through the earth into china. anyway i'd love to hear from y'all!
Well I have had a single turbo for two years and it's been great. When they say upgrade vacuum lines to wastegates, they aren't lying. It's only a matter of time before the basic kit lines fail an you are over boosting. Also you talking 600 at the crank or wheels? Cause "only" 500 or 600 can turn into more effort than you think. Depending on available fuel and budget and blah blah blah
600 crank on like e85 lol. i'm tryna only run like 500 regularly. car is my daily till probably next year where i plan to turn up boost. just need to fix my leaking turbo without overpaying and buying twins when i'll probably go single anyway.
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      11-29-2020, 02:36 PM   #5
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Mine has been problem free for over 2+ years. 93 + 1200cc of meth 22psi around 550-600whp I would guess from what I have seen other dyno on a dynojet. I will get around to it someday.

A single is inherently twice as reliable as twins and has the ability to make significantly more power.

A single turbo sounds sooo much better.

You should be able to hit 500whp on 93 alone. Add meth or ethanol mixes for lots more fun.

That being said those new RB GFs look cool.
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      11-30-2020, 12:34 AM   #6
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Originally Posted by Torgus View Post
Mine has been problem free for over 2+ years. 93 + 1200cc of meth 22psi around 550-600whp I would guess from what I have seen other dyno on a dynojet. I will get around to it someday.

A single is inherently twice as reliable as twins and has the ability to make significantly more power.

A single turbo sounds sooo much better.

You should be able to hit 500whp on 93 alone. Add meth or ethanol mixes for lots more fun.

That being said those new RB GFs look cool.
looking at speed tech looks super good been emailing jeff
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