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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning Cts turbo f-series bmw n55 boss turbo upgrade

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      11-26-2022, 11:49 PM   #1
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Cts turbo f-series bmw n55 boss turbo upgrade

I figured I'd make a post on this turbo, couldn't really find much information on this since everyone joined the b58 family and they're the hot commodity in the streets.
Just a little background on my M235i:
Car is currently FBO of course, including a spool fx-150 HPFP and a spool stage 2 LPFP, with MHD custom map from True Power Software making low 400's on the dyno.
Car has been running great, beating a lot of stock turbo n54's.
But with all these n54's being upgraded turbos and b58's making over 500whp it was time to upgrade to keep it competitive.
First impression on the turbo is the obvious A LOT bigger than stock, have some pictures for comparison. As I write this, the car is jacked up in the garage. I will be doing the install at home so I can provide all the details.
Looking forward to seeing the car taking on some upgraded turbo n54's and some b58's.
If the turbo is as advertised, it should easily make close to 600whp for now.
If needed might upgrade HPFP to a stage 2 and upgrade injectors might possibly add port if needed to max out the turbo.
Will keep you guys updated with progress.
And a quick shoutout to Extreme Powerhouse for the turbo.
Fast shipping, great products and great communication!
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      11-26-2022, 11:51 PM   #2
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Here are some pictures to compare the turbos!
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      11-26-2022, 11:54 PM   #3
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Some more pictures, wasn't letting me upload all at once
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      11-27-2022, 09:49 AM   #4
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Thank you for the shoutout and pictures.

Looking forward for your feedback after the turbo is installed
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      11-27-2022, 11:02 AM   #5
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Quote:
Originally Posted by mike@x-ph.com View Post
Thank you for the shoutout and pictures.

Looking forward for your feedback after the turbo is installed
I should start data logging this week, and hopefully bring some pump gas numbers then some e50 numbers.
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      11-27-2022, 07:20 PM   #6
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Quote:
Originally Posted by 135 TING View Post
I should start data logging this week, and hopefully bring some pump gas numbers then some e50 numbers.
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      11-29-2022, 02:55 PM   #7
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excellent, following.
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      11-30-2022, 04:09 AM   #8
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Also interested, waiting on X-ph to ship mine now!
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      11-30-2022, 12:04 PM   #9
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Also interested, waiting on X-ph to ship mine now!
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      12-05-2022, 07:46 AM   #10
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      12-05-2022, 03:09 PM   #11
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Quote:
Originally Posted by Boostedphil698 View Post
Any updates?
Im not sure if hes having issues or not, but i had just finished mine not even an hour ago, it was a hell of a time trying to install, have a small coolant leak and have to adjust my wastegate but outside of that i think its hooked up right, im waiting on a new turbo inlet at the moment my pcv cracked when i pulled it out
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      12-05-2022, 03:15 PM   #12
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Quote:
Originally Posted by Es_wetto View Post
Im not sure if hes having issues or not, but i had just finished mine not even an hour ago, it was a hell of a time trying to install, have a small coolant leak and have to adjust my wastegate but outside of that i think its hooked up right, im waiting on a new turbo inlet at the moment my pcv cracked when i pulled it out
Are you gonna dyno? Really hoping this turbo is the real deal.
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      12-05-2022, 06:15 PM   #13
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Originally Posted by Boostedphil698 View Post
Are you gonna dyno? Really hoping this turbo is the real deal.
So far it seems badass, i am giving my fingers a break temporarily to finish it up, and i plan on dynoing and getting tuning done by tuning tech in crofton maryland since they are local to me
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      12-05-2022, 06:16 PM   #14
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Quote:
Originally Posted by Es_wetto View Post
So far it seems badass, i am giving my fingers a break temporarily to finish it up, and i plan on dynoing and getting tuning done by tuning tech in crofton maryland since they are local to me
Sick! Let me know how it goes.
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      12-05-2022, 07:15 PM   #15
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Originally Posted by Boostedphil698 View Post
Any updates?
Sorry guys I was out of town, I should be finishing up soon. Taking my time on installation to make sure things are good.
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      12-06-2022, 08:42 AM   #16
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Quote:
Originally Posted by 135 TING View Post
Sorry guys I was out of town, I should be finishing up soon. Taking my time on installation to make sure things are good.
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      12-06-2022, 01:54 PM   #17
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Quote:
Originally Posted by 135 TING View Post
Sorry guys I was out of town, I should be finishing up soon. Taking my time on installation to make sure things are good.
Make sure you snug up the lines very well! I accidentally didnt tighten one of the water lines enough and ive got a nice slow leak going on, fixing it this coming weekend, also would you by chance have ista+ so i can adjust my wastegate aswell?
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      12-06-2022, 03:07 PM   #18
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Any trouble with the stage 2 lpfp? A lot of people talk about the EKP module overheating
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      12-12-2022, 09:05 AM   #19
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Quote:
Originally Posted by Es_wetto View Post
Make sure you snug up the lines very well! I accidentally didnt tighten one of the water lines enough and ive got a nice slow leak going on, fixing it this coming weekend, also would you by chance have ista+ so i can adjust my wastegate aswell?
We want updates

Make sure to do a 91/93/E30 dyno.

Peeps that only run normal 91/93 want numbers from this kit, I'm especially curious about the 91 oct only.
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      12-12-2022, 06:08 PM   #20
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Quote:
Originally Posted by chaungo View Post
We want updates

Make sure to do a 91/93/E30 dyno.

Peeps that only run normal 91/93 want numbers from this kit, I'm especially curious about the 91 oct only.
Just got my base map from doc vu, I will be getting tuned on 93, do any of you guys know a good way to check wastegate? My laptop isnt large enough to store ista+, i would love to make sure its correct and isnt going to limit me
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      12-13-2022, 10:59 AM   #21
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Quote:
Originally Posted by Es_wetto View Post
Just got my base map from doc vu, I will be getting tuned on 93, do any of you guys know a good way to check wastegate? My laptop isnt large enough to store ista+, i would love to make sure its correct and isnt going to limit me
I believe the EWG has to be done VIA ISTA+

PWG is easier as there was this vacuum device you plugged it and there was a gauge you can check if it's within spec, and you adjust the nut from there.
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      12-14-2022, 02:16 AM   #22
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Great Post!!!! Looking forward for some more updates and power results!
Regarding EWG, yes ISTA+ is the correct method.
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