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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning Pure Turbo n55 upgrade

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      09-22-2014, 01:04 PM   #1
Waldmanboy235
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Pure Turbo n55 upgrade

Anyone else out there had their eyes on this. Saw something on the Burgertuning instagram. Let me know what you guys think. Obviously i would need to be running full bolt on before doing a turbo upgrade. Another question that i had is does anyone know if you can run a BOV with the turbo upgrade or is it still the EWG?

http://www.pureturbos.com/store/oem-...o-upgrade.html
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      09-22-2014, 01:48 PM   #2
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Idk about the turbo upgrade but as far as running a BOV, you can't with these cars. They are designed to run with a DV or the car will throw a CEL and probably not run as well

BOV are designed for high hp and boost engines. You'll never need it on these cars
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      09-22-2014, 03:58 PM   #3
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bov and dv are really the same thing. Only difference is a bov is a atmospheric vent and the dv just releases pressure within the intake system. The reason why a bov is not a good idea on these cars is they are maf regulated so you don't want to release metered air into the atmosphere. It will create a rich condition when you initially come off boost. So the tune could delete the maf sensor but I am not sure why you would want to do that, it's lazy
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      09-22-2014, 07:06 PM   #4
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i've been seriously considering this for my 135i N55. I have just ordered a Vargas performance DV due to me having issues with the stock one.

If anyone has any experiences with the Pure product i'm very keen to hear what you guys think of it.
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      09-22-2014, 07:54 PM   #5
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check this out

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      09-26-2014, 10:11 AM   #6
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Can this turbo be swapped out without changing anything else in the engine? combined with mods anyone think it could hurt anything?
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      09-26-2014, 10:41 AM   #7
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Quote:
Originally Posted by mankid247 View Post
Can this turbo be swapped out without changing anything else in the engine? combined with mods anyone think it could hurt anything?
I'm sure you'd have the upgrade the cast pistons and rods, maybe swap to a castless down pipe as well.

I think the most difficult thing would be engine management. Does JB4 allow for custom maps?
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      09-26-2014, 12:01 PM   #8
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It all really depends on the differences in the turbo. I don't see any specs or comparisons to the stock turbo. It mentioned a larger compressor wheel, but how much larger? Also, what about the compressor housing and the exhaust housing? Is the exhaust housing a twin scroll like the stock? All of these things make a huge difference in how it will perform.

Changing the turbo also doesn't directly require any of those other changes. Things like pistons and rods are a completely different story, and again require a lot more information.

If the new turbo is running the similar boost, it will probably run pretty well on something like the JB4, but again that also depends on the specs of the turbo. It will likely have a different personality and ideally an upgraded turbo would breathe better at high rpms. How well it ran would depend on how well those cells in the fuel map are setup since the stock turbo can't really reach them.
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      09-26-2014, 11:25 PM   #9
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Anyone have the turbo upgrade ?
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      09-29-2014, 02:42 AM   #10
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The above posted vid of the F20 M135i is my car. I have some more vids posted up on youtube. I am running this turbo since early May and around 12k km. The car runs fine.

The car is FBO. Full milltek exhaust system, 200 cell sport cat, wagner intercooler, ER charge pipe, BMS Intake, BMS Meth kit and I run a 30 to 40% E85 mix.

All tuning is done only with JB4. I am running a custom map6 boost curve. When ECU tune is available for my ECU I will have a backend flash done and run JB4 on top for Meth and additional boost control.
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      09-29-2014, 02:45 AM   #11
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Quote:
Originally Posted by Uponone76 View Post
I'm sure you'd have the upgrade the cast pistons and rods, maybe swap to a castless down pipe as well.

I think the most difficult thing would be engine management. Does JB4 allow for custom maps?
Actually you can run this turbo on a otherwise completely stock car. Tuning can be done with JB4 only. I do recommend a sport cat or cat less down pipe and either run some ethanol in the mix to up your octane. More octane = more boost = more performance.

The turbo has a larger compressor wheel and clipped turbine wheel. Other than that it uses the same housing as the stock turbo. Hence its called a stage 1 upgrade.

Further more Pure turbos are working on a stage2 upgrade as well. Should you want to upgrade in the future from your stage1 to stage2 kit you will have the stage1 refunded. Now how nice is that?
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      09-29-2014, 02:47 AM   #12
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furthermore there is a big thread on E90 post 3 series N55 forum that has a ton of information including dyno runs, quarter mile test data etc etc.
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      09-29-2014, 09:00 AM   #13
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Quote:
Originally Posted by Darkhold View Post
furthermore there is a big thread on E90 post 3 series N55 forum that has a ton of information including dyno runs, quarter mile test data etc etc.
I believe this is the thread Darkhold is referencing:

http://www.e90post.com/forums/showthread.php?t=850405

As much as I'd love to do a turbo upgrade, I feel it'd be better to wait for a more reliable engine management solution. Hopefully one becomes available soon.

I'm also curious how the zf8 speed would hold up to the additional hp and tq.
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      09-29-2014, 10:02 AM   #14
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Quote:
Originally Posted by Uponone76
Quote:
Originally Posted by Darkhold View Post
furthermore there is a big thread on E90 post 3 series N55 forum that has a ton of information including dyno runs, quarter mile test data etc etc.
I believe this is the thread Darkhold is referencing:

http://www.e90post.com/forums/showthread.php?t=850405

As much as I'd love to do a turbo upgrade, I feel it'd be better to wait for a more reliable engine management solution. Hopefully one becomes available soon.

I'm also curious how the zf8 speed would hold up to the additional hp and tq.
Engine management wont help the turbo blow more air. The stock turbo is just too small.

My zf 8 speed is holding up just fine btw. I think i am running the pure stage 1 for one of longest periods since its been available.
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      09-29-2014, 12:27 PM   #15
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If anyone is fine running higher boost with the JB4 and stock turbo, no reason they shouldn't be fine with that at similar boost levels. As already mentioned, this is avery similar sized turbo as the stock one. If you look at the dyno charts, it's going to be very similar performance to stock up to @5500 rpm (though likely will a very slight dropoff at really low rpms as the turbo will take slightly longer to spool up).

The biggest difference is really just the high rpm power where this turbo is able to hold out approximately an additional 1000 rpms. For those that know how HP is measured, it should be obvious this is why the HP numbers will be higher for this turbo.

http://www.pureturbos.com/store/medi...pure_turbo.jpg

The overall torque curve doesn't look like anything that should really affect other parts of the car, in other words it won't be much, if any, harder on it than the stock turbo at similar levels of boost (things like transmission, pistons, rods, etc.). It may even be easier on things like the intercooler as it will be working more efficiently at the higher rpms and will therefore heat the intake air less.

It really comes down to, do you want to feel the power to continue to be there until redline, or are you happy with the curve you have now. If you'd really like that power extended into the higher rpms, than this would likely be a good performance modification. Plus, it will be good for bragging rights as the higher rpm power means higher measured HP numbers for those that like to compare those things.
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      09-29-2014, 12:33 PM   #16
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This post is a good example of what I'm talking about with the different personality.
http://www.e90post.com/forums/showpo...postcount=1580

Quote:
FBO stock turbo with meth map 3 349 WHP and 489 WTQ
FBO Pure STG1 with Meth map 6 400 WHP and 480 WTQ (16.5 PSI peak)
Notice the torque numbers are very similar, this is because the peak torque comes in at lower rpms where the stock turbo is able to perform well. The HP numbers are much more different, though, because the stock turbo can't hang on into the higher rpm's for those.
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      01-13-2015, 09:09 AM   #17
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thanks
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      03-02-2015, 01:36 AM   #18
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Any 2 series guys running this yet?
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      03-02-2015, 03:06 AM   #19
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Quote:
Originally Posted by verbs View Post
Any 2 series guys running this yet?
I will switch to pure stage2 turbo this week on my F20 M135i (pneumatic wastegate).
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      03-05-2015, 07:17 AM   #20
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Quote:
Originally Posted by Darkhold View Post
I will switch to pure stage2 turbo this week on my F20 M135i (pneumatic wastegate).
Stage 2 Complete?
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      03-05-2015, 07:26 AM   #21
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Quote:
Originally Posted by jeffery_stearns View Post
Stage 2 Complete?
I should pick the car up later today with stage2 installed
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      03-05-2015, 01:56 PM   #22
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Car picked up and drives great.
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