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Discussion Starter · #1 ·
So I am looking to add some pep to my 2014 Cruze Eco Manual and want to start with a BNR Tune, K&N Intake, and boost gauge (for fun). My big question is about the tune, upon reading around some articles talked about potential over boost issues? How does this happen? How do I prevent this from being a problem with the BNR tune? and how aggressive can I get with the tine without worrying about the over boost or making internal mods?

Thanks!
 

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The initial tune is set fairly conservatively. You will likely encounter an overboost condition (no damage will occur - the car puts itself into a safe "limp mode") with the base tune; you'd need to data log your car after getting the base tune installed and send it off to BNR to have a tune tweaked specifically for your car. Through that data logging process, it may take just one or it may take multiple re-tunes to get your car 100% dialed in as you want it.
 

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Save yourself some $$$ and grab the BNR stage one kit

Bad News Racing Cruze 1.4T Stage 1 Kit 2011-2016 Limited

I haven't seen any over boost issues on our ECU yet, it has excellent waste gate control.
Only thing that sometimes happens is wastegate flutter, but it seams to be a very limited group who experience this.

If your going tuned just watch for the Intake PCV check valve, thats the only thing that really fails that causes damage...
And an untuned cruze is as likely to have the same failure and issues, its just that this accelerates the process.

The perma fix involves installing this throttle body spacer, and would give you a solid boost port tap
BNR Throttle Body Spacer - LUV/LUJ 1.4T
http://www.cruzetalk.com/forum/34-g...urbo-intake-manifold-pcv-check-valve-fix.html
 
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Discussion Starter · #4 ·
The initial tune is set fairly conservatively. You will likely encounter an overboost condition (no damage will occur - the car puts itself into a safe "limp mode") with the base tune; you'd need to data log your car after getting the base tune installed and send it off to BNR to have a tune tweaked specifically for your car. Through that data logging process, it may take just one or it may take multiple re-tunes to get your car 100% dialed in as you want it.
So under what conditions does overboost occur? I assume when you get on it hard or something?
 

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Discussion Starter · #6 ·
Save yourself some $$$ and grab the BNR stage one kit

Bad News Racing Cruze 1.4T Stage 1 Kit 2011-2016 Limited

I haven't seen any over boost issues on our ECU yet, it has excellent waste gate control.
Only thing that sometimes happens is wastegate flutter, but it seams to be a very limited group who experience this.

If your going tuned just watch for the Intake PCV check valve, thats the only thing that really fails that causes damage...
And an untuned cruze is as likely to have the same failure and issues, its just that this accelerates the process.

The perma fix involves installing this throttle body spacer, and would give you a solid boost port tap
BNR Throttle Body Spacer - LUV/LUJ 1.4T
http://www.cruzetalk.com/forum/34-g...urbo-intake-manifold-pcv-check-valve-fix.html
Another question after reading that post, sounds like you can do that fix after the pcv valve fails so in the interest of me only being able to spend so much at once would you think it is okay to hold off on that unless/untill failure occurs/I have the money to do that?
 

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"Overboost" is simply when the car sees more boost pressure than it has commanded. It is a tuning term, not a mechanical one. It is not very common that it happens, but there are many safeguards in place to ensure that if it does happen, the ECU takes precautionary steps to prevent any engine damage. The tune is very safe.

While the Stage 1 kit is a good value, bear in mind that the intake does not really add any performance. You'll be gaining low single digit horsepower gains at peak power. You'll be much better off waiting for the BNR V2 downpipe to come out, which should be in the next few weeks, and getting just the tune to start out: BNR Tune 2011-2016 Limited chevrolet Cruze 1.4L Turbo

I've been tuned for a couple of years and have put some very heavy driving through this engine. Make sure you're using a good oil (specifically, I mean AMSOIL, as most group 3 oils can't handle the stress the turbo produces when tuned long-term).

The boost threshold is set in the tune; I'm not entirely sure what it is though. The issue sometimes comes from inconsistencies in wastegate adjustments from the factory. Once those inconsistencies are accounted for in the tune with a datalog, you won't have anything to be concerned with.
 

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Discussion Starter · #10 ·
"Overboost" is simply when the car sees more boost pressure than it has commanded. It is a tuning term, not a mechanical one. It is not very common that it happens, but there are many safeguards in place to ensure that if it does happen, the ECU takes precautionary steps to prevent any engine damage. The tune is very safe.

While the Stage 1 kit is a good value, bear in mind that the intake does not really add any performance. You'll be gaining low single digit horsepower gains at peak power. You'll be much better off waiting for the BNR V2 downpipe to come out, which should be in the next few weeks, and getting just the tune to start out: BNR Tune 2011-2016 Limited chevrolet Cruze 1.4L Turbo

I've been tuned for a couple of years and have put some very heavy driving through this engine. Make sure you're using a good oil (specifically, I mean AMSOIL, as most group 3 oils can't handle the stress the turbo produces when tuned long-term).

The boost threshold is set in the tune; I'm not entirely sure what it is though. The issue sometimes comes from inconsistencies in wastegate adjustments from the factory. Once those inconsistencies are accounted for in the tune with a datalog, you won't have anything to be concerned with.
Thanks for clearing that up! Im a mechanical engineering student so mechanically things all make scene but tuning the ecu is very new to me.

I want the intake more for improved response and sound, I am aware that I wont see much power gain from it. I didn't want the down pipe as dosent it void power train warranty? Im sure if it dose so does the intake but my logic with that is that i can put the stock one back in in 20-30min or less and take the car in, the down pipe would need more work.
 

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Thanks for clearing that up! Im a mechanical engineering student so mechanically things all make scene but tuning the ecu is very new to me.

I want the intake more for improved response and sound, I am aware that I wont see much power gain from it. I didn't want the down pipe as dosent it void power train warranty? Im sure if it dose so does the intake but my logic with that is that i can put the stock one back in in 20-30min or less and take the car in, the down pipe would need more work.
If you're getting the car tuned; that warranty ship has sailed. Fortunately, we don't ever see any issues caused by a BNR tune, so it isn't likely that your dealer would have reason to blame it.

Downpipe would need more work, but would also provide better results. Up to you really. I have an intake, but bought it used.
 

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Discussion Starter · #12 ·
If you're getting the car tuned; that warranty ship has sailed. Fortunately, we don't ever see any issues caused by a BNR tune, so it isn't likely that your dealer would have reason to blame it.

Down pipe would need more work, but would also provide better results. Up to you really. I have an intake, but bought it used.
So I mean transparency mode is a thing lol.......I guess im just wondering if i put an intake and down pipe on it if there is any hope of maintaining the power train warranty?
 

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Depends on the dealer. My dealer doesn't care. Took it in for a bad flywheel and they said nothing about the mods and the tow hitch. Other dealers might try to weasel their way out of warranty work by blaming mods. I've seen them blame an intake on completely unrelated issues.



Sent from my STV100-1 using Tapatalk
 

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You need a tune for the down pipe. That said lots of people running BNR tune for 1000s of miles without issue. DONT WORRY BE HAPPY! You can fix the intake pcv anytime. They all go bad-even on stock engines its not if --BUT WHEN. Every dealer is diff-some very easy -MOST Pricks about mods--now if they do them its all good. g
 

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Discussion Starter · #15 · (Edited)
On another note, with the intake, tune and a down pipe what would I be looking at to the wheels and what sort of 0-60 might I see? this is the 2014 Eco Manual fyi.
 
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