[Marana]

Hmmm... We may not be comparing apples to apples. I don't want to steer you wrong, so please let someone more knowledgeable chime in before growing too concerned.

I knew I had a leak on mine because I had the symptoms described on the Danoz thread. If you don't, your higher boost pressure may be normal based on your JDM/fuel combo.

If you get that higher boost consistently and you don't find loose clamps, then I say rock on and enjoy that turbo!

Hi Athens,

Did send my car to my trusty mechanic to check all the 5 clamps. He check each one of it by testing any loose clamp, then loosen the clamp and tighten it back. The mechanic say all are in working condition and he mention that the clamps cant be over tighten as it can "squeeze" the hose.

For peace of mind, he ask me to get those clamps what Danoz recommend to replace it as those are very good quality and it doesn't sell here!

When I told him about the turbo manage to hit over 19+ while should be standard 16, the mechanic say it can have many factors affect how much the turbo can perform. Factors such as engine oil, oil temperature, the petrol uses as well as altitude can make the difference of that extra 3 psi.

I will be shopping for Breeze Liner Clamps now just to prevent any future problem.

 

[Lachaon]

I have a 2016 XT, and my built in Boost Gauge reads it's max was 19.5 psi. Live in Tx, and only run 91. US-Spec os Sport#. I think ur fine if ur running 19.

 

[Gusu]

Marana check the clamps near the air filter aswell I had a leak there and my boost and performance was erratic before those where replaced. There are 8 clamps in total if i remember correct.

 

[Marana]

Marana check the clamps near the air filter aswell I had a leak there and my boost and performance was erratic before those where replaced. There are 8 clamps in total if i remember correct.

Hi there Gusu, thanks for the advise. Did send to my local mechanic here and he say all looks good and tight. I will send it once a month to get a regular check till I get the breeze clamp as recommend by danomax

Cheers!

 

[elmark]

Today my stock 16' xt went to 20.2 psi, the screen had a max reading of 19.3 for a while.

 

[DaveB00T]

Is there a way to reset the max reading on the MFD boost screen?
I liked my Cobb in the manner that every time I would turn it back on, it would reset to zero, then I can see what my max was that trip.

Nevermind, found it....when on Boost screen, just tap the "i"/set button to reset it. Do not hold it down.

 

[nogard]

Today my stock 16' xt went to 20.2 psi, the screen had a max reading of 19.3 for a while.

I see max around 20-21 a lot... but it rarely stays there... I've seen sustained boosts around 18-19...

 

[Adrian80]

I have a 2013 XT, I get 27 PSI for a quick burst, then down to 11 Probably have a boost leak. I will have to get the new hose clamps and put them on.

 

[intelik808]

I Remember that my boost would be steady at 18-19psi but recently (after basic service) it was steady at 16psi. i wonder if it has to do with an software update.

 

[Marana]

Just an update, have driven the XT just pass the 12000KM. My XT is stock and that clamps is still the original that came with it as the mechanic (3rd party workshop and not Subaru dealer workshop) did not recommend to change it as there working condition and no wear and tear.


Did my last servicing about a month ago and the mechanic recommended to burn some excess carbon that might build up as I dont drive above 100km/hr.

I did a run on the stretch of empty highway and found something interesting and yet curious that might need the forum expert/guru for feedback.

Start WOT (uhmmm maybe not as MFD shows acceleration 40% - 50%) starting at speed of 40km/hr(25mph) on S mode all the way to 180km/hr(112mph) and constant at that speed for a brief time (less than 10 sec).

My passenger told me the turbo boost gauge in MFD show constant between 1.30(18.9psi) to 1.35(19.6psi) with most of the time hover at 1.30(18.9psi).

Since I reset the turbo peak indicator, I can tell that the during the acceleration, the turbo boost peak at 1.4 (20.3psi)

Can anyone who are able to tell me anything I should be looking at? Are these any indication of clamps leakage? or any other thing that I missed out?

Thanks

 

[Jayc]

Can anyone who are able to tell me anything I should be looking at?

What was the ambient temperature and your altitude during the run?

 

[Marana]

What was the ambient temperature and your altitude during the run?

Hi Jayc,

Altitude - estimate range from 15 meter(49 feet) - 25 meter (82 feet)
Ambient Temperature : 27C (80.6F)
Engine Temperature (Before acceleration): 94C (201.2F)
Engine Temperature (After acceleration): 101C (213.8F)
Engine Oil : Mobil 1 5w50 Fully Synthetic (this is what Subaru dealer recommended)

 

[Jayc]

Hi Jayc,

Altitude - estimate range from 15 meter(49 feet) - 25 meter (82 feet)
Ambient Temperature : 27C (80.6F)
Engine Temperature (Before acceleration): 94C (201.2F)
Engine Temperature (After acceleration): 101C (213.8F)
Engine Oil : Mobil 1 5w50 Fully Synthetic (this is what Subaru dealer recommended)

Hey, sorry about the late reply.

Without logs its difficult to tell if you're car is 100%. The stock boost targets are around 16psi but the targets may change with temperature and baro compensations (it could be higher or lower).

I believe your runs look normal with the data you had provided. You mentioned your runs were in s auto, so the rpm would have hovered between 5000-5500rpm and in most stock tunes, the boost targets would be nearing its peak. The boost would tapper from 5400rpm.

You quoted in Celsius first so I assume you're not from the US.... If you're either in Euro or Australia, I would say get your clamps checked out for boost leaks. The euro 5 emission tuned cars do not have a wide torque band and boost would tapper down significantly after 4500rpm (which would be impossible to hit 1.2 kpa(18psi) or more at 5000rpm).

 

[Badwolf16]

I know this is an older thread, but I have a 2016 XT which just rolled past 18k miles and I am currently showing 22.0 psi as my max boost on the MFD gauge. I wonder if I might have a leak, because my gauge isn't at all steady at WOT and higher in the RPM range, it kinda bounces around a bit between 15-20 psi. I had just assumed that the gauge wasn't super accurate and was just to give us something pretty to look at.

I haven't noticed any sort of irregularity in how it runs at WOT, unless it has been like this form day one. It's bone stock, has had the regular interval maintenance by my Subaru dealer, and has also had the recalled air intake duct replaced.

 

[kewvention]

hmm.. thats good to know.. ive been seeing 0.9 as my max, i think i have a massive issue

 

[Freakshow999]

I know this is an older thread, but I have a 2016 XT which just rolled past 18k miles and I am currently showing 22.0 psi as my max boost on the MFD gauge. I wonder if I might have a leak, because my gauge isn't at all steady at WOT and higher in the RPM range, it kinda bounces around a bit between 15-20 psi. I had just assumed that the gauge wasn't super accurate and was just to give us something pretty to look at.

I haven't noticed any sort of irregularity in how it runs at WOT, unless it has been like this form day one. It's bone stock, has had the regular interval maintenance by my Subaru dealer, and has also had the recalled air intake duct replaced.

Yes the gauge is not accurate and will round up. If it drives and feels the same as it has since it was new I would disregard the gauge issue. However Below is some info you may or may not find useful: :grin2:

Our target boost pressure stock is around 16psi with an error threshold of around 4psi. I live at sea level so stock I would see momentary 20-21 peak boost. Depending on throttle position, simulated gear, mph, and rpm the ecu will dial back the boost.
The max boost you will see will also be dependant on ambient intake temp and altitude.
WOT at high RPM you should see your boost start to decrease after around 5k from my experience it's an ECU correction/protection. MPH does make a difference in how high the ECU will allow your boost to go at WOT it may let you hit a max for a certain amount of time then dial it down as your speed increases.
Another point is the factory recirculating BOV leaks and has a very small diaphragm. It's actual design from stock is to not actually close all the way until you are over 5lbs of boost. This becomes more prevalent when you start doing power upgrades like a pro tuned stage 1.

And then of course is the fact that Subaru uses SH@T worm clamps which are prone to failure and leaking especially on the charge side of the intake system. (Turbo to BOV/Charge Pipe to TMIC to Throttle Body Input) Search Danzo hose clamp fix.

I'm running a custom Stage2 "light" and I can tell you once I changed my BOV to a direct replacement recirculating upgrade my boost cutoffs per tune (Performance I and S are 16psi, with S# at 19.5psi and my Econ Tune with a max of 13psi.) my cut offs are accurate +/- >0.5psi.
I replaced all suggested hose clamps, added an AEM intake, Accessport and a had a protune stage 1 done. I then installed an aftermarket TMIC and the difference in less negative pressure charge pressure between the upgrade and the stock one made my spool up night and day, as far as how fast it was and how linear the boost response is. (this was without any retuning yet)

If all your clamps are good and you are sure you have no leaks (except what the stock BOV does internally) add a Cobb Accessport and just run stage 0 if you don't want to mess with performance gains. Their basic ECU corrections will make your boost more linear and you will have less boost spiking.