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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > n55 stock turbo upgrade



View Poll Results: interested in upgrading stock turbo?
yes 60 90.91%
not interested 6 9.09%
Voters: 66. You may not vote on this poll

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      02-29-2012, 08:09 PM   #1
martin515
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n55 stock turbo upgrade

Would you guys be seriously interested? This is not a troll question im in the process of recieving a new stock turbo for upgradeability options.
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      02-29-2012, 08:52 PM   #2
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Need more info.
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      02-29-2012, 09:45 PM   #3
sA x sKy
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the question is..who wouldn't be interested in one? fairly sure everyone on this board would get it if money were no object.
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      02-29-2012, 11:41 PM   #4
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Super interested.
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      03-01-2012, 04:25 AM   #5
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nuff said ;]
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      03-01-2012, 09:09 AM   #6
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Need more information brother
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      03-01-2012, 09:22 AM   #7
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+1 more info needed... Are we talking about clipping the turbine, or something more substantial...
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      03-01-2012, 09:30 AM   #8
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+2 more info, Would a bigger Comp wheel fit in the turbo?
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      03-01-2012, 11:31 AM   #9
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In for info, although would be very interested if we could get options like the N54 stock turbo upgrades
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      03-01-2012, 01:16 PM   #10
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There is a thread that I posted with RB's analysis on upgrading stock turbos. Would be interesting to see your analysis and what you found in R&D.

If I can get a turbo that makes 500whp on a mustang dyno with linear powerband, I'd pay lots
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      03-01-2012, 01:29 PM   #11
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Quote:
Originally Posted by turugara View Post
There is a thread that I posted with RB's analysis on upgrading stock turbos. Would be interesting to see your analysis and what you found in R&D.

If I can get a turbo that makes 500whp on a mustang dyno with linear powerband, I'd pay lots
thats a nasty number to get on a mustang dyno... my dyno kinda showed that a fbo n55 with a little more tuning may reach 330 whp max on a mustang. At that point the stock turbo is just out of breath! My guess is if your going to go much higher than that, your tq would be insane as mine was already 382 wtq and i'd start to worry bout internals / clutch etc...
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      03-01-2012, 04:42 PM   #12
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I want to see what a clipped stock wheel would do. Wonder if it's the impeller side holding things back.
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      03-01-2012, 07:17 PM   #13
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Yes very interested in this - looking forward to more info
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      03-01-2012, 07:27 PM   #14
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yes for the upgrade
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      03-01-2012, 10:39 PM   #15
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Quote:
Originally Posted by Sloppy View Post
thats a nasty number to get on a mustang dyno... my dyno kinda showed that a fbo n55 with a little more tuning may reach 330 whp max on a mustang. At that point the stock turbo is just out of breath! My guess is if your going to go much higher than that, your tq would be insane as mine was already 382 wtq and i'd start to worry bout internals / clutch etc...
Not necessarily Sloppy. The issue is that our stock turbo's make power very early and run out of breath up top. If you can HOLD 400TQ all the way to redline, you'll make a ridiculous amount of HP. Simply, HP is a function of TQ x RPM. Therefore if you can maintain high TQ at a high RPM, your making a lot of HP.

So...

All we need is a turbo that doesn't run out of breath up top. Then we are golden.
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      03-02-2012, 12:25 AM   #16
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Quote:
Originally Posted by turugara View Post
Not necessarily Sloppy. The issue is that our stock turbo's make power very early and run out of breath up top. If you can HOLD 400TQ all the way to redline, you'll make a ridiculous amount of HP. Simply, HP is a function of TQ x RPM. Therefore if you can maintain high TQ at a high RPM, your making a lot of HP.

So...

All we need is a turbo that doesn't run out of breath up top. Then we are golden.
You would make 500hp if you could make 400tq at 6565rpm.
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      03-02-2012, 08:33 AM   #17
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Quote:
Originally Posted by Gimmethecash View Post
You would make 500hp if you could make 400tq at 6565rpm.
yes.... too bad that what makes torque at certain RPM's are the cam design and the intake runners size not the boost
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      03-02-2012, 08:41 AM   #18
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well this is a good discussion... what happened to those guys a couple months ago that said they were putting money into R&D already?
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      03-02-2012, 01:28 PM   #19
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we are taking the turbo to be modified sat or monday and should have an update next week. I have a friends car with FBO and procede ready to go as soon as we complete the modifications. I will keep you guys updated. I have my stock 335 waiting to be upgraded also so im just as excited as you guys to see what we can pull off.
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      03-02-2012, 01:53 PM   #20
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awesome!
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      03-03-2012, 10:18 PM   #21
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Id preffer a bigger turbo over an upgraded stock
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      05-20-2012, 10:47 AM   #22
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Any updates?
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