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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 Reliability (rod bearing problems?)



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      08-24-2018, 01:13 PM   #287
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Quote:
Originally Posted by Bigugly View Post
i dont need to explain volume efficiency and how a (correctly) ported head benefits practically any engine, there's countless google topics you can read up on that.
But any time you help stop a bottleneck, it helps overall.
ok found the convo with MMP they said ported head is very good and nets 30% more flow

i asked for ferrera valvetrain and they said i could rev to 8200 rpm with it on a n54 but not sure on a n55 what the dme limit is...

they said no point in doing valves if not doing ported head...


valvetrain upgrade nets only 4% more flow vs 30% for ported head..

they recommend i only do this if going huge turbo and bigger power goals....

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      08-24-2018, 02:55 PM   #288
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Not to add fuel to the fire but, they've never posted N55 flow numbers.
They don't have N55 valve train. We're the only company that's developed it. I won't keep beating a dead horse (like them using Chrysler head studs, then switching to a stud with a spacer for drop in installs- the same thing they tried to say was "silly" with our set lol)
I digress- have a great weekend, folks!
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      08-24-2018, 03:02 PM   #289
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Quote:
Originally Posted by Xdrive35i2014 View Post
If going for a head ported job, what are some highly reputable shops? ABR, vacmotorsport?
I cannot make a recommendation. I know who I would steer clear of. If I needed an engine built, it would be done locally by a friend and 20-year ASE-certified mechanic who is an avid racer, race car builder and has worked on practically everything with an engine that doesn't fly.
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      08-24-2018, 08:19 PM   #290
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Quote:
Originally Posted by Bigugly View Post
You're kidding me, right?
That's ridiculous lol
Our N55 head flows nearly identical numbers as our N54 head, and they make 650hp at 23psi, and over 800 at 30.
We run out of octane with 93 at 16-17psi, vs a stock head at 19 on a single turbo.
A stock head makes 650hp at 30psi, for reference
Damn, that's impressive. Are those numbers quoted at the wheels on the stock turbos?
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      08-25-2018, 08:54 AM   #291
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Quote:
Originally Posted by Bigugly View Post
Not to add fuel to the fire but, they've never posted N55 flow numbers.
They don't have N55 valve train. We're the only company that's developed it. I won't keep beating a dead horse (like them using Chrysler head studs, then switching to a stud with a spacer for drop in installs- the same thing they tried to say was "silly" with our set lol)
I digress- have a great weekend, folks!
which company do you represent i cant see it on my cell phone ? there is ported head on a n55 thata been done yet right ?
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      08-25-2018, 10:09 AM   #292
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Quote:
Originally Posted by Bours View Post
which company do you represent i cant see it on my cell phone ? there is ported head on a n55 thata been done yet right ?
He's from Houston. Looks like he might be from ABRhouston.
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      08-27-2018, 08:58 AM   #293
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You're assumption would be correct.
I tread lightly here, since I've been banned multiple times for not being a "sponsor" when I'm trying to have a conversation.
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      08-27-2018, 01:22 PM   #294
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BU, were those numbers you quoted above be at the flywheel, or whp?
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      10-09-2018, 09:36 PM   #295
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2011 n55 e90 335i problems

I have had a lot of the common issues earlier than the predicted mileage. I love my car but how much more can I take with only 60k miles on a 2011!!

Water pump @50k
Fuel pump @35k
Blow off valve @60k
Charge pipe blew apart @60k
Blower motor wiring (recall) a/c stopped blowing @58k
Front lower thrust rods and control arms jan 2018 @55k
Radiator replacement @52k
Valve cover gasket @27k
Coolant reservoir @27k
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      10-10-2018, 08:11 AM   #296
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Quote:
Originally Posted by LBoogs View Post
I have had a lot of the common issues earlier than the predicted mileage. I love my car but how much more can I take with only 60k miles on a 2011!!

Water pump @50k
Fuel pump @35k
Blow off valve @60k
Charge pipe blew apart @60k
Blower motor wiring (recall) – a/c stopped blowing @58k
Front lower thrust rods and control arms jan 2018 @55k
Radiator replacement @52k
Valve cover gasket @27k
Coolant reservoir @27k
What does this have to do with this thread ? This thread was opened for the rod bearing failures .. Did your motor fail ?
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      10-10-2018, 04:16 PM   #297
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Quote:
Originally Posted by LBoogs View Post
I have had a lot of the common issues earlier than the predicted mileage. I love my car but how much more can I take with only 60k miles on a 2011!!

Water pump @50k
Fuel pump @35k
Blow off valve @60k
Charge pipe blew apart @60k
Blower motor wiring (recall) a/c stopped blowing @58k
Front lower thrust rods and control arms jan 2018 @55k
Radiator replacement @52k
Valve cover gasket @27k
Coolant reservoir @27k
Most of those things have happened at very early mileages. Most of them are not totally uncommon to do over the life of the car, but you're definitely above the norm at those mileages in my opinion.
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      10-10-2018, 05:45 PM   #298
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Quote:
Originally Posted by Welcome to NBA Jam View Post
Most of those things have happened at very early mileages. Most of them are not totally uncommon to do over the life of the car, but you're definitely above the norm at those mileages in my opinion.
They must have been drunk at the factory when they built his engine lol. That's a lot of issues at low mileage.
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      11-08-2018, 04:41 PM   #299
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And here i am with a possible rod bearing failure after a year of opening this thread..... My car is still at RRT Racing since a warranty claim is gonna have to be opened but surprise surprise! Small metallic powder/peaces in my oil filter....


Current Status of my car

90,000 miles
Charge Pipe
Intake
JB4 Tune

Original BMW oil has been used every 5k miles


Will report back after the MaxCare claim goes through and the engine is opened up for internal check up.

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      11-08-2018, 05:22 PM   #300
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Ever test your oil?
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      11-08-2018, 06:14 PM   #301
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Quote:
Originally Posted by 9krpmrx8 View Post
Ever test your oil?
Have been testing my oil on every oil change through black stone labs..... i was about to be due on my 3rd oil change since owning the vehicle at 90k miles. Attached the last test.....
Attached Images
File Type: pdf 11 335I-180612.pdf (151.4 KB, 10 views)

Last edited by Jeyoller; 11-09-2018 at 10:34 AM.
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      11-09-2018, 12:31 AM   #302
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Ouch. Whatever failed, it must have been pretty sudden if no evidence came up in the oil analysis. Maybe it's not rod bearings?
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      11-09-2018, 12:45 AM   #303
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This is pretty scary now. I'm due for an oil change at 95k and my other two oil samples with ~5k on them each came back with normal results. And I'm far more tuned than Jey with California's watered down 91...
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      11-09-2018, 06:08 AM   #304
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Quote:
Originally Posted by LBoogs View Post
I have had a lot of the common issues earlier than the predicted mileage. I love my car but how much more can I take with only 60k miles on a 2011!!

Water pump @50k
Fuel pump @35k
Blow off valve @60k
Charge pipe blew apart @60k
Blower motor wiring (recall) – a/c stopped blowing @58k
Front lower thrust rods and control arms jan 2018 @55k
Radiator replacement @52k
Valve cover gasket @27k
Coolant reservoir @27k
everything you mentioned is common on the e90 platform and wear and tear, nothing engine related. If you want more reliability then go get a Prius.

Btw prepare oil filter housing gasket soon
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      11-09-2018, 08:49 AM   #305
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Quote:
Originally Posted by xxMike61 View Post
This is pretty scary now. I'm due for an oil change at 95k and my other two oil samples with ~5k on them each came back with normal results. And I'm far more tuned than Jey with California's watered down 91...
If its so scary why dont you tune for reliability instead of power..
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      11-09-2018, 10:48 AM   #306
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Quote:
Originally Posted by Jeyoller View Post
Have been testing my oil on every oil change through black stone labs..... i was about to be due on my 3rd oil change since owning the vehicle at 90k miles. Attached the last test.....

Yeah I am thinking it may be something else that failed. I compared your reports to mine and other than yours have much lower viscosity than my M1 0W-40, the wear metal numbers look pretty close to mine and I have 98,000 miles on mine.
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      11-09-2018, 11:02 AM   #307
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So do you get any rod knock noise ? You said someone will be tearing up the engine to have a look at this ? That would be nice finally
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      11-09-2018, 01:10 PM   #308
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Originally Posted by Pladi View Post
So do you get any rod knock noise ? You said someone will be tearing up the engine to have a look at this ? That would be nice finally
Not sure whether or not they'd be tearing it apart completely since it'll be a warranty claim but it actually just sounded like belt tensioner / pulleys when i took it in (plus some suspension issues which was my main concern for the warranty claim) and it turned out to be coming from inside the engine.... so im patiently waiting to hear back from them now
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