New Turbo Smoking - What to do? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SRSmith · 06-19-2020, 08:42 PM

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 · 06-19-2020, 09:32 PM

To be clear, the actual turbo is smoking. It's not smoking out of the exhaust.

sr vegas 240 · 06-19-2020, 11:21 PM

you possibly have spilled oil on it or even grease just from touching it.

samotage · 06-20-2020, 12:23 AM

Is it ball bearing, and if so is there a restrictor in the oil feed?

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samotage · 06-20-2020, 12:41 AM

The other thing, is it could just be settling in. Heat wrap for example does this on its first heat cycle.

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S14rebuild · 06-20-2020, 05:04 AM

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

samotage · 06-20-2020, 05:05 AM

And what he said

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SRSmith · 06-20-2020, 08:54 AM

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?

samotage · 06-21-2020, 01:19 AM

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.

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SRSmith · 06-22-2020, 05:20 AM

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

sr vegas 240 · 06-22-2020, 11:08 AM

Boost controller has nothing to do with ur afr. You will need to get it tuned

smoked240 · 06-22-2020, 05:47 PM

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.

*TheRealSy90* · 06-23-2020, 12:40 PM

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.

SRSmith · 06-30-2020, 07:44 PM

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

06-19-2020, 08:42 PM	#1
SRSmith Leaky Injector Join Date: Jun 2019 Location: Wisconsin Posts: 91 Trader Rating: (0) 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

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) Feedback Score: 4 reviews	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. __________________

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06-19-2020, 09:32 PM	#2
SRSmith Leaky Injector Join Date: Jun 2019 Location: Wisconsin Posts: 91 Trader Rating: (0) Feedback Score: 0 reviews	To be clear, the actual turbo is smoking. It's not smoking out of the exhaust.

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) Feedback Score: 12 reviews	you possibly have spilled oil on it or even grease just from touching it.

06-20-2020, 12:23 AM	#4
samotage BANNED Join Date: Oct 2018 Location: Melbourne Posts: 88 Trader Rating: (0) 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

06-20-2020, 12:41 AM	#5
samotage BANNED Join Date: Oct 2018 Location: Melbourne Posts: 88 Trader Rating: (0) 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

06-20-2020, 05:04 AM	#6
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) 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

06-20-2020, 05:05 AM	#7
samotage BANNED Join Date: Oct 2018 Location: Melbourne Posts: 88 Trader Rating: (0) Feedback Score: 0 reviews	And what he said Sent from my iPhone using Tapatalk

06-20-2020, 08:54 AM	#8
SRSmith Leaky Injector Join Date: Jun 2019 Location: Wisconsin Posts: 91 Trader Rating: (0) 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?

06-21-2020, 01:19 AM	#9
samotage BANNED Join Date: Oct 2018 Location: Melbourne Posts: 88 Trader Rating: (0) 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

06-22-2020, 05:20 AM	#10
SRSmith Leaky Injector Join Date: Jun 2019 Location: Wisconsin Posts: 91 Trader Rating: (0) 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

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) Feedback Score: 12 reviews	Boost controller has nothing to do with ur afr. You will need to get it tuned

06-30-2020, 07:44 PM	#14
SRSmith Leaky Injector Join Date: Jun 2019 Location: Wisconsin Posts: 91 Trader Rating: (0) 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