VVT Tuning Noise - ADDED: Comparison Video

[Reaper]

i get a very similar noise on cold startup about 1 in 3 times. Its either this of there is a piece of slag down in my exhaust somewhere that vibrates on startup on its way into high rev. Anyone else hear something similar on cold start?

[regal]

Originally Posted by wbradley

Very unlikely detrimental. But some possibility it will reveal a weakness in the fuel systems ability to maintain constant pressure at throttle tip-in. Nothing to worry about.

I consider throttle tip one of the worst quirks this car has, but I want 200k miles. Most here are looking to trade-in after a couple years.

[Dezoris]

@regal @Element Tuning @arghx7 @wparsons @kiichiro @DJCarbine


Wanted to provide an update to this thread. I rigged up 4 mics under the hood with 24 Bit recording, even if you are bad speakers you can visually and audibly hear the valvetrain noise I am speaking about associated with the cam angle change. I also included the log view of these events.

Here are the logs to accompany the video:





UNDER HOOD VIDEO WITH PRO MICS TO CAPTURE SOUND:

[ame="http://www.youtube.com/watch?v=ErpHXIr4BmI"]FA20 VVT Valvetrain Noise - Perrin Tune - YouTube[/ame]

[Dezoris]

@shiv@vishnu for video clip above.

[Luckrider]

It sounds exactly like mine. I took another video today. This time it has 3rd gear a few times as well as fourth and fifth on e85 which makes the change more audible. In addition to that, the dealership just changed the HPFP (No More Crickets!) and supposedly something with the cam. I haven't had a chance to verify the cam claim yet by reading through the paperwork though. With this video, I can now easily hear the change on my phone and ultrabook. I don't need to hook it up the to sound system or Grados to actually hear the changeover.

[ame="https://www.youtube.com/watch?v=nKCK_zViHks"]4000k RPM Note Change on e85 - YouTube[/ame]

Edit: I just pulled up the paperwork and it looks like they just replaced some extra gaskets on top of the HPFP. They also hit the tail lights, GPS bracket/GPS Map Card and the frozen window TSB.

[nelsmar]

Just thought I would mention that the ticking sound is getting louder right around when your car is switching to what looks like 100% DI injection. Can you post the logs to download ? viewing screenshots like that is not efficient.

[Dezoris]

Originally Posted by nelsmar

Just thought I would mention that the ticking sound is getting louder right around when your car is switching to what looks like 100% DI injection. Can you post the logs to download ? viewing screenshots like that is not efficient.

Uploaded

[1Cor10:23]

@Luckrider let us know if the cricket fix is permanent haha

Sent from my SGH-I317M using Tapatalk

[Luckrider]

Originally Posted by 1Cor10:23

@Luckrider let us know if the cricket fix is permanent haha

Sent from my SGH-I317M using Tapatalk

Will do. I was surprised because all of the parts but the GPS bracket were supposed to be on worldwide back order and the dealer got them in about 1 week.

[nelsmar]

Originally Posted by Dezoris

Uploaded

I'll send you 3 test roms to try when you have the time to test things.

[Dezoris]

Originally Posted by nelsmar

I'll send you 3 test roms to try when you have the time to test things.

Thanks bru, try it this week.

[regal]

Originally Posted by Dezoris

@regal @Element Tuning @arghx7 @wparsons @kiichiro @DJCarbine


Wanted to provide an update to this thread. I rigged up 4 mics under the hood with 24 Bit recording, even if you are bad speakers you can visually and audibly hear the valvetrain noise I am speaking about associated with the cam angle change. I also included the log view of these events.

Here are the logs to accompany the video:





UNDER HOOD VIDEO WITH PRO MICS TO CAPTURE SOUND:

My main hobby is computer audiophile (I've got quite the setup.). The noise couldn't be more identical except your's may be louder. My car is 100% stock and this started when the dealer flashed for the very first CEL light flash fiasco, fall 2012. Mine kicks in a little higher rpm more like 4.5k but I keep my eyes on the road so that might be off.


I haven't shifted over 3-4k since I first started hearing it (unless absolutely necessary), I figure this will all get sorted out eventually. There are quite a few posts of broken cams on here so this car is just a commuter now. Its still fun around the twisty's at 3k rpm. Don't have the time or energy to fight it.


With romraider/ecuflash coming I think the famous anti-EcuTek east coat Subaru gurus will sort tuning these cars and get these engine running right. Stock it just doesn't.

[CajunFRS]

Crazy to think anyone would call that noise working as intended.

ALL GOOD HER BRO I'VE BEEN DOING DIS.

[andrew20195]

Originally Posted by regal

There are quite a few posts of broken cams on here so this car is just a commuter now.

I just did a quick search and couldn't find any. Do you have a link?