Well it is purple (9in hg) and pink (4in hg) for me. I'm running 14 in hg of vacuum. Works fantastic.
BOV Setup for your N54
- Thread starter Chris@VargasTurboTech
- Start date
Well it is purple (9in hg) and pink (4in hg) for me. I'm running 14 in hg of vacuum. Works fantastic.
What Martymil said. I'd check connections first to see if there's any loose clamps.
Turbos are New upgraded td04 turbos. Forgot to tell. I made a post on troubleshoot, could you guys check the datalog I uploaded there? Had problems reaching boost target on the oem turbos as well 2 weeks before upgrading.
Cant see boost in your log only boost target.
Also looks like one of your injectors on bank 1 is not playing nice judging by your stft's
Also looks like one of your injectors on bank 1 is not playing nice judging by your stft's
Check for boost leaks. I had similar behavior (Only reaching 15psi, yet targeted 22psi) until I noticed I forgot to install the meth plugs on my new charge pipe LOL! Crazy thing is I drove around for weeks like this
Before: 15psi max boost
After: 22psi (What an amazing mod! Haha)
Before: 15psi max boost
After: 22psi (What an amazing mod! Haha)
Thats the kind of upgrade I can fully support!Check for boost leaks. I had similar behavior (Only reaching 15psi, yet targeted 22psi) until I noticed I forgot to install the meth plugs on my new charge pipe LOL! Crazy thing is I drove around for weeks like this
Before: 15psi max boost
View attachment 44167
After: 22psi (What an amazing mod! Haha)View attachment 44168
No error codes with that?
You'd think there would be a low pressure boost code....however at 14 psi maybe it isn't low enough to throw a code.
For mhd its just not reaching target. For the car ecu it's good enough.
Check for boost leaks. I had similar behavior (Only reaching 15psi, yet targeted 22psi) until I noticed I forgot to install the meth plugs on my new charge pipe LOL! Crazy thing is I drove around for weeks like this
Before: 15psi max boost
View attachment 44167
After: 22psi (What an amazing mod! Haha)View attachment 44168
Damn that will get ya. I've done similar things. I'm shocked the car drove like that!
the first batch of phoenix pipes from terry shipped with the plugs loose. took me a solid month before i found that leak.
So I've read through all pages of this thread....but I still have some questions on some recent BOV issues I've been having. I will try to keep this short....I have two main questions.
So...some background. I've been running an MHD OTS stage 2+ E40 tune for 6 months now. I'm still on stock turbos, and I'm running a Tial BOV with the standard 10psi spring. Car runs great, logs look fantastic, no issues. Nice "WOOOOSH" sound when I get out of the throttle and the boost dumps. Very happy with the entire setup. All is good.
Recently I noticed that there was a crack in the flange of the rear oem inlet where it hooks to the turbo. I decided to install some VRSF 1.75" silicone inlets. Install went fine......car runs great, but now I have this horrible screeching parrot/squealing noise every time the BOV dumps pressure. (see attached video).
So...after finding this thread, and seeing some of VCC's suggestions....I swapped the 10psi spring that the Tial BOV came with for the black 7psi spring. It's slightly open at idle (spring can't overcome vacuum from engine), but it sounds like that's not a big deal
So...here are my questions.
1. The screeching parrot sound is still there....even with the 7psi spring in the Tail BOV and new 1/4" ID line going to it from the BMS adapter. What can I do to get rid of that horrible sound? Is that just a product of the silicon inlets? If so, why?
2. With the lighter spring, I'm getting what sounds like BOV flutter at low rpm/low load/low boost situations.....it's annoying. I never had this with the 10psi spring. What's causing this?
WOT logs still look great, car runs great, no issues at all....just some flutter at mid boost, and the hoot-owl sound from the BOV that's embarrassing.
Any advice would be a huge help!! Thanks!
So...some background. I've been running an MHD OTS stage 2+ E40 tune for 6 months now. I'm still on stock turbos, and I'm running a Tial BOV with the standard 10psi spring. Car runs great, logs look fantastic, no issues. Nice "WOOOOSH" sound when I get out of the throttle and the boost dumps. Very happy with the entire setup. All is good.
Recently I noticed that there was a crack in the flange of the rear oem inlet where it hooks to the turbo. I decided to install some VRSF 1.75" silicone inlets. Install went fine......car runs great, but now I have this horrible screeching parrot/squealing noise every time the BOV dumps pressure. (see attached video).
So...after finding this thread, and seeing some of VCC's suggestions....I swapped the 10psi spring that the Tial BOV came with for the black 7psi spring. It's slightly open at idle (spring can't overcome vacuum from engine), but it sounds like that's not a big deal
So...here are my questions.
1. The screeching parrot sound is still there....even with the 7psi spring in the Tail BOV and new 1/4" ID line going to it from the BMS adapter. What can I do to get rid of that horrible sound? Is that just a product of the silicon inlets? If so, why?
2. With the lighter spring, I'm getting what sounds like BOV flutter at low rpm/low load/low boost situations.....it's annoying. I never had this with the 10psi spring. What's causing this?
WOT logs still look great, car runs great, no issues at all....just some flutter at mid boost, and the hoot-owl sound from the BOV that's embarrassing.
Any advice would be a huge help!! Thanks!
The sound is definitely coming out of the blow off valve? You are able to cause this while reving and sitting still?
My tial knock off sounded like that. I have a Turbosmart now and it sounds alot better.
Do you have a log of this exact instance? That would help narrow down the reasons.
Here is another thread that talks about this same problem: https://www.spoolstreet.com/threads/compressor-surge-flutter-16t-hybrids.6836/
The consensus there is this is caused by a tuning issue. I think you said you're using OTS maps, so perhaps you need a custom tune?
Nope....only does it when the turbos build boost and the BOV opens and dumps it. I can't get it to do it when just reving the motor.
Honestly, the BOV flutter concerns me less than the horrible noise the BOV is making. If I put the slightly heavier BOV spring in (10psi), the flutter goes away. It's not compressor flutter. The car ran great with the heavier 10psi spring in the BOV.....it opened with just a slight about of pedal input and decrease in vacuum. This lighters 6-7psi black spring is wide open and idle, and technically...it's to light. I could probably try shimming it a bit to get it just slightly closed at idle. Who knows, a little more pressure on the spring might get rid of the fluttering also.
That horrible screeching sound from the BOV is what I really hate.....
