Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > S Chassis

S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


Reply
 
Thread Tools Display Modes
Old 06-19-2020, 08:42 PM   #1
SRSmith
Leaky Injector
 
Join Date: Jun 2019
Location: Wisconsin
Posts: 91
Trader Rating: (0)
SRSmith is an unknown quantity at this point
Feedback Score: 0 reviews
New Turbo Smoking - What to do?

Good evening,

Finally got around to installing a new turbo in my sr20 s14. My stock turbo was blown so I opted for a knockoff T28 (couldn't get a T25) with good reviews. Didn't want to spend much as I plan to move to a top mount soon. Also went with braided lines.

Upon install, I turned the engine over to get coolant and oil through the lines. It did start a couple times, but I turned it off quickly. After that I started it and let it idle, but the turbo is smoking. This isn't normal, is it? Video of boost, AFR, and turbo below.

https://drive.google.com/file/d/14qt...ew?usp=sharing

Thank you much
SRSmith is offline   Reply With Quote
Sponsored Links
Old 06-19-2020, 09:32 PM   #2
SRSmith
Leaky Injector
 
Join Date: Jun 2019
Location: Wisconsin
Posts: 91
Trader Rating: (0)
SRSmith is an unknown quantity at this point
Feedback Score: 0 reviews
To be clear, the actual turbo is smoking. It's not smoking out of the exhaust.
SRSmith is offline   Reply With Quote
Old 06-19-2020, 11:21 PM   #3
sr vegas 240
Zilvia Junkie
 
Join Date: Dec 2013
Location: vegas
Age: 33
Posts: 301
Trader Rating: (12)
sr vegas 240 is an unknown quantity at this point
Feedback Score: 12 reviews
you possibly have spilled oil on it or even grease just from touching it.
sr vegas 240 is offline   Reply With Quote
Old 06-20-2020, 12:23 AM   #4
samotage
BANNED
 
Join Date: Oct 2018
Location: Melbourne
Posts: 88
Trader Rating: (0)
samotage is an unknown quantity at this point
Feedback Score: 0 reviews
Is it ball bearing, and if so is there a restrictor in the oil feed?


Sent from my iPad using Tapatalk
samotage is offline   Reply With Quote
Old 06-20-2020, 12:41 AM   #5
samotage
BANNED
 
Join Date: Oct 2018
Location: Melbourne
Posts: 88
Trader Rating: (0)
samotage is an unknown quantity at this point
Feedback Score: 0 reviews
The other thing, is it could just be settling in. Heat wrap for example does this on its first heat cycle.


Sent from my iPad using Tapatalk
samotage is offline   Reply With Quote
Old 06-20-2020, 05:04 AM   #6
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
New turbos have a oil coating on them, keep them from rusting, center section and rear housing. That oil resdue is burning off. Dont worry just give it a few heat cycles and youll be just fine, the smoke will subside
S14rebuild is offline   Reply With Quote
Old 06-20-2020, 05:05 AM   #7
samotage
BANNED
 
Join Date: Oct 2018
Location: Melbourne
Posts: 88
Trader Rating: (0)
samotage is an unknown quantity at this point
Feedback Score: 0 reviews
And what he said


Sent from my iPhone using Tapatalk
samotage is offline   Reply With Quote
Old 06-20-2020, 08:54 AM   #8
SRSmith
Leaky Injector
 
Join Date: Jun 2019
Location: Wisconsin
Posts: 91
Trader Rating: (0)
SRSmith is an unknown quantity at this point
Feedback Score: 0 reviews
Thanks all for the answers.

Now that I'm thinking of it, I did use some rust penetrant on the bolts farther down on the downpipe. However, I didn't use much, and it looked like the actual housing was smoking. Knowing that new ones often do is a relief.

Do my idle AFR and vacuum look correct?

I'm going to try the car under load today. Since I now have a t28 in a car that was tuned for a t25, will I have to retune? Right now the wastegate actuator is vented right into the turbo, but I do have a boost controller.

Should I check my AFR under boost as is, and put in the controller if I need it?
SRSmith is offline   Reply With Quote
Old 06-21-2020, 01:19 AM   #9
samotage
BANNED
 
Join Date: Oct 2018
Location: Melbourne
Posts: 88
Trader Rating: (0)
samotage is an unknown quantity at this point
Feedback Score: 0 reviews
A bigger turbo will pump more air, and put you at risk of lean out, then a lunched motor. Don?t load it until you can have it tuned.


Sent from my iPad using Tapatalk
samotage is offline   Reply With Quote
Old 06-22-2020, 05:20 AM   #10
SRSmith
Leaky Injector
 
Join Date: Jun 2019
Location: Wisconsin
Posts: 91
Trader Rating: (0)
SRSmith is an unknown quantity at this point
Feedback Score: 0 reviews
Can a boost controller be used to correct a lean Air/Fuel ratio, or can it only limit how high your turbo boosts?

Thanks as always
SRSmith is offline   Reply With Quote
Old 06-22-2020, 11:08 AM   #11
sr vegas 240
Zilvia Junkie
 
Join Date: Dec 2013
Location: vegas
Age: 33
Posts: 301
Trader Rating: (12)
sr vegas 240 is an unknown quantity at this point
Feedback Score: 12 reviews
Boost controller has nothing to do with ur afr. You will need to get it tuned
sr vegas 240 is offline   Reply With Quote
Old 06-22-2020, 05:47 PM   #12
smoked240
Zilvia FREAK!
 
Join Date: Jun 2010
Location: North Dakota
Age: 30
Posts: 1,066
Trader Rating: (4)
smoked240 is not welcome here anymoresmoked240 is not welcome here anymoresmoked240 is not welcome here anymoresmoked240 is not welcome here anymoresmoked240 is not welcome here anymoresmoked240 is not welcome here anymoresmoked240 is not welcome here anymoresmoked240 is not welcome here anymoresmoked240 is not welcome here anymore
Feedback Score: 4 reviews
Send a message via MSN to smoked240
More air=Need more fuel.

Only way to adjust this properly is a tune. Have you let it get to a full heat cycle without driving it? Let it get to full temp and watch around the turbo/engine bay. if its oil spill or something it will burn off after a bit.
__________________
smoked240 is online now   Reply With Quote
Old 06-23-2020, 12:40 PM   #13
TheRealSy90
Premium Member
 
TheRealSy90's Avatar
 
Join Date: Mar 2009
Location: Maricopa, AZ
Age: 30
Posts: 7,679
Trader Rating: (10)
TheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant future
Feedback Score: 10 reviews
The stock ecu with mafs will compensate for a t28 upgrade IF you leave it at wastegate pressure (around 7 psi), remove the boost controller and carefully watch your afr under boost, it should be fine. That's literally what the mafs is for, so the ecu can adjust fuel based on airflow.
__________________
Quote:
Originally Posted by crimsonrockett View Post
Such a good signature.
TheRealSy90 is offline   Reply With Quote
Old 06-30-2020, 07:44 PM   #14
SRSmith
Leaky Injector
 
Join Date: Jun 2019
Location: Wisconsin
Posts: 91
Trader Rating: (0)
SRSmith is an unknown quantity at this point
Feedback Score: 0 reviews
Thanks everyone, the turbo has stopped smoking.

Currently the AFR is good, but I'll way overboost if I gun it. However, the boost controller is not connected right now, and I'm using the actuator that came with the turbo. Should I connect the controller and set it to top out at 7psi (what the car was originally at). I should be safe driving it like that for now if the AFR is fine, right? Am I correct in guessing the car will just be slower than before with delayed boost?

Again, thanks to everyone for their input
SRSmith is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 11:44 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™