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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 > turbo replacement, inlets worth it if staying stock fuel?



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      08-18-2016, 02:24 PM   #1
maxgohan
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turbo replacement, inlets worth it if staying stock fuel?

hey guys

I need new turbos and I'm contemplating getting inlets

right now I only have a jb4 and intake, but I'm getting downpipes too
obviously the install of these 2 items (downpipes and inlets) will be free since the labor for turbos is already there....

I plan on keeping my car mostly stock other than the intake I already have, and getting downpipes.

I was just wondering, should I bother spending the additional $300ish for inlets when I will not be flashing custom tunes, simply using the jb4, don't plan on doing too many mods in the future either...
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      08-18-2016, 02:33 PM   #2
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might as well do inlets along with the turbo install.... trust me you'll have an itch for more power later down the road.
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      08-18-2016, 02:57 PM   #3
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yea, I say I dont want more power now but who knows tomorrow

which brand of stock location inlets are the best on the market?
they'll be paired to my injen intake
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      08-18-2016, 03:07 PM   #4
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Since the turbos are going out i recommend getting inlets as well
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      08-19-2016, 06:17 AM   #5
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Just grab the mmp inlets and outlets if you can it will make your turbos work a lot less, or make a lot more power depending on what you wanna do
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      08-19-2016, 06:35 AM   #6
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Do inlets. Id not worry about outlets in the slightest.
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      08-19-2016, 08:39 AM   #7
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Definitely recommend inlets on upgraded turbo's. Even if it's not about power, it's about efficiency. The turbo's can breathe so much better with inlets, which lowers WGDC, increasing efficiency and therefore your turbo's will work less to make the same power.
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      08-19-2016, 09:25 AM   #8
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If I ever need to get every vendor on the board in one thread pronto, I'll just put up a post with the title "Doing everything at once -- which FMIC, intake, DPs, charge pipe, inlets, and upgraded turbo should I get?"
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      08-19-2016, 12:08 PM   #9
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Quote:
Originally Posted by JasW View Post
If I ever need to get every vendor on the board in one thread pronto, I'll just put up a post with the title "Doing everything at once -- which FMIC, intake, DPs, charge pipe, inlets, and upgraded turbo should I get?"
But thats not what OP asked, not even close
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      08-19-2016, 12:18 PM   #10
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Quote:
Originally Posted by Rob@RBTurbo View Post
Do inlets. Id not worry about outlets in the slightest.
Why? I thought there were dyno proven gains...
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      08-19-2016, 01:01 PM   #11
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thanks for the suggestions guys,

the consensus seems to be to just spring for the inlets.

keep in mind guys that this is my daily driver car
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      08-19-2016, 01:50 PM   #12
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Quote:
Originally Posted by hellokitty
Quote:
Originally Posted by Rob@RBTurbo View Post
Do inlets. Id not worry about outlets in the slightest.
Why? I thought there were dyno proven gains...
Op said he's keeping his car "mostly stock", so the assumption is that means stock replacement turbos. While he may benefit with inlets, there's no reason to get outlets with stock turbos.
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      08-19-2016, 04:38 PM   #13
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Are inlets all about power or are they also proven to significantly increase the life of turbos? I recently had the opportunity to get inlets when I had my RB turbos out for a rebuild. I was not convinced that given my car is a daily driver with occasional free way bursts over the weekend to exercise her, I should get inlets. Already I feel the power the car has is a lot and just more than sufficient for a daily commute drive car. May be one of these days in the future I will regret the lost opportunity, but right now I simply don't see the point given my circumstances.
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      08-19-2016, 04:46 PM   #14
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Inlets and outlets are small money imo. They will help even stock turbos. If you are in there you might as well do them.
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      08-20-2016, 09:23 AM   #15
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Quote:
Originally Posted by mike@x-ph.com View Post
But thats not what OP asked, not even close
Just a little friendly chain yanking.
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      08-20-2016, 10:39 AM   #16
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Quote:
Originally Posted by musa View Post
Are inlets all about power or are they also proven to significantly increase the life of turbos? I recently had the opportunity to get inlets when I had my RB turbos out for a rebuild. I was not convinced that given my car is a daily driver with occasional free way bursts over the weekend to exercise her, I should get inlets. Already I feel the power the car has is a lot and just more than sufficient for a daily commute drive car. May be one of these days in the future I will regret the lost opportunity, but right now I simply don't see the point given my circumstances.
For upgraded turbos, especially when pushed extensively, you want to at least have inlets for turbo efficiencies and reliabilities sake. It is less of a concern if you are NOT pushing to the max, but they still will offer significant efficiency benefits regardless (meaning turbo works less hard, every day, all day, to meet any boost targets). During servicing (i.e. when the turbos are already removed) is the absolute best time to add them.

I'd not concern myself with outlets TOO much; unless you are really going for utmost efficiency on upgraded turbos AND can find a high quality, well fitting, and nicely designed set of outlets. A well designed outlet will certainly offer a bit better efficiency for the turbo as well, but not nearly at the levels of inlets. The install of outlets are much easier to service, or with turbos already in place.

In short Inlets are where it is at, these days with the availability that exists you just simply do them without question.

Rob
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      08-20-2016, 11:35 AM   #17
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Inlets have been proven many times on even stock turbos to gain 35-45whp

MMP outlets have been proven a few times to make gains as well on stock turbos. MMP outlets are the only 2" outlets on the market.

Here is the latest review and dyno gains for outlets posted here

http://www.e90post.com/forums/showthread.php?t=1290781

This user gained 24whp on stock turbos with outlets keeping boost the same.

Results speak for themselves.
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      08-21-2016, 12:25 PM   #18
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Considering I'm stock on the charge side (stock fmic, cp) can I still expect the 24whp gain with outlets?
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      08-21-2016, 04:07 PM   #19
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Quote:
Originally Posted by maxgohan View Post
Considering I'm stock on the charge side (stock fmic, cp) can I still expect the 24whp gain with outlets?
The fmic needs to come first. If you can only afford one, get the intercooler instead. You'll regret doing other mods and skipping the fmic.
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      08-21-2016, 06:56 PM   #20
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that's the advice I need^^^
thanks
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