Jump to content
SAU Community

Strange Deep Sound When Coming On Boost

SargeRX8

By SargeRX8,
in Engines & Forced Induction

 Share

Recommended Posts

SargeRX8 Grand Master

SargeRX8

Posted
Posted (edited)

Hi all,

Have no idea whats going on. I was suspect of a boost leak so loaded up my intake with a small amount of pressure and had a leak between the BOV and mounting plate. Problem seems to still be there. I've uploaded a video to youtube. You must use headphones as the sound is low frequency and barely audible but you will hear it as soon as boost ramps up. The sounds frequency changes, it starts off high(still very low) and gets lower.

Anybody able to confirm this is a boost leak based off the sound? It is not a mechanical sound. You can hear it at exactly one second.

Edited by SargeRX8
RBrennan25 Grand Master

RBrennan25

Posted
Posted

Mine has the same problem, it's fairly normal (but still annoying). Not sure if this is true but I've been told that the standard nissan BOV's have been to designed to leak very slightly at idle to idle smoother (could use confirmation either way here) and therefore coming onto boost, where there is a small pressure on one side, it's enough to just force the spring open a little, but on WOT the other side of the spring is pushed down as well keeping it closed.

I'll see if I can find where I got that info from :)

EDIT: can confirm its normal for GTR BOV's to leak at idle and very light cruise. As suggested above, if you're concerned search for GTR BOV fart, but I wouldn't stress, just use more WOT ;)

GTSBoy Grand Master

GTSBoy

Posted
Posted

It's the exact same noise mine made with GTR BOV on it. It's kinda funny. You can play with it. You end up using more fuel from the constant on-off throttle action.

I took the GTR BOV off mine after a while because I thought it dulled the boost transition compared to the RB25 BOV. That was at stock boost though, without any gate control. I've been meaning to put it back on for a while to see if I can feel the difference again.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • joshuaho96
      My BMW 335i

      By joshuaho96 · Posted

      Out here E90s are the cheapest way into a sporty-ish car because everyone knows just how expensive the repairs can get. 8-10k USD for an automatic 335i. 
    • cobo_11
      My BMW 335i

      By cobo_11 · Posted

      Noted. Have noticed BMW are more 'high maintenance' for sure. They've attracted my attention as I think the used car prices seem reasonable vs other options, and the extra quality overall vs a commodore / camry / corolla or similar of the same vintage is appealing, especially the interior, and they are more on the sporty side whereas the others mentioned can be more cruising or economical A-to-B only.
    • cobo_11
      My BMW 335i

      By cobo_11 · Posted

      Haha yeah I know, this is SAU after all, why are we talking about BMW's of all things!? I hear you on the 'don't have to worry about it' side of things. Having been fortunate enough to be have been able to buy a brand new motorbike or two...never really enjoyed them as much as I'd have liked as you worry so much about where you park it, will it get scratched, stolen, attempted theft, knocked over, etc...and yes dirty. Older less valuable bikes you can just go where you want and park it wherever and not really worry that much in comparison. And who cares if it gets dirty! Never owned a V8, and have had my eyes on VE / VF commodores for years but with their prices climbing so high, the M3 has come into focus more as prices are much closer than I've ever seen...is it a potential contender now?...of course need to factor in the S65 'maintenance' especially and like you said general M car 'tax'. One can dream anyway. But more on the reality front - did read the whole 330i thread as well and was a great read too, both threads enlightening as I've never even driven one of these cars! I do recall 330i didn't seem to have the same amount of issues for almost the same car (turbos and related differences notwithstanding)...perhaps down to getting it earlier in it's life so looked after better than the 335i? Perhaps so as your 130i has been good and quite similar, so finding a car that's been looked after well is the especially-crucial-BMW-first-step.
    • luke gtr
      So i brought a boat...

      By luke gtr · Posted

      Nice. Dont worry about the time of not running. My current skyline hasn't run since I bought it. About 8 years ago.
    • PranK
      My BMW 335i

      By PranK · Posted

      It's also worth noting that I am heavily and unconditionally biased. I've had a lot of cars including some GTRs a fair while ago. I love my BMW's now a lot. They make no sense a lot of the time and the guys on here remind me regularly that I could get something else that does what I want better and cheaper. If you're going to take on an older BMW it's definitely a commitment. If you bail on it early you'll lose money and also the ability for it to put a smile on your face. Stick with it and it just gets better.  f**k I should get into advertising.  
×
×
  • Create New...