Jump to content
SAU Community

Boost Problem!

scottish lad
 Share

Recommended Posts

scottish lad Contributor

scottish lad

Posted
Posted

Hi Guys,

Ok, I just installed an aftermarket GFB BOV (dumps to atmosphere and recirculates) Since doing so my boost gauge, which is stock now only peaks at around 5, before it peaked above +7. I thought i had found the fault just there as i found a hole in the vaccume pipe going to black box, so i cut it back and reconnected it but still the same issue. I cant seem to hear any boost leak(dont know if you would hear it with engine running)nor can i feel any leak anywhere? Is it possible the stock gauge is f**ked or is it more likely there is a leak somewhere along the line. Just seems funny as iv just noticed it after installing BOV. I was going to get boost gauge anyway so guess when i get that i can eliminate or determine if the gauge is at fault. May also try stock valve back on 2mo to see if the problem is still there? Any more help would be great and il update 2mo after trying stock valve back on.

Cheers

James

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

Try tightening the blow off valve. Might be leaking under boost

Are you talking about the vale itself or the mounting bolts? Dont think you can tighten up the valve and the two mounting bolts are tight!

cheers

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/#findComment-5736212
Share on other sites
tridentt150v Grand Master

tridentt150v

Posted
Posted

STd BOV is better anyway..........no need to change it. Do a search on stalling and BOV's and see the problems aftermarket ones cause.

DVS32R was talking about the inbuilt adjustment, lots of BOV's have adjustment to increase or lower pressure release levels.

BTW you need a password to look at that pic.......use your SAU pic account - accessible to everyone then.

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/#findComment-5736840
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

STd BOV is better anyway..........no need to change it. Do a search on stalling and BOV's and see the problems aftermarket ones cause.

DVS32R was talking about the inbuilt adjustment, lots of BOV's have adjustment to increase or lower pressure release levels.

BTW you need a password to look at that pic.......use your SAU pic account - accessible to everyone then.

Thanks mate. Oh and i know you do get BOV where you turn the top by hand to adjust (mine doesnt do this) is this what you are talking about? Im pretty sure when i first installed it, it was making more of a dump to atmo noise, now it seems to be more of a light flutter noise????

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/#findComment-5737175
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

Just put stock valve back on, still under boosting but sound like when i come off the throttle its dumping to atmosphere??? This didnt do this before i changed it to the GFB BOV??? Any ideas? It could be obvious but im kind of new with regards to turbos.

Cheers

James

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/#findComment-5737370
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

Sorry for all the replys in a row....But when changing the BOV the only other thing i done was change the standard air box to a K and N pod filter (dont think this would cause boost problems tho.lol)

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/#findComment-5737391
Share on other sites
luvpsi Mentor

luvpsi

Posted
Posted

boost leak somewhere could be a gasket leak on the BOV or piping leak of some sort best thing to do is a piping leak test

heres a link of a do it yourself leak test on silvia wa

http://www.silviawa.com/forums/index.php?showtopic=41897

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/#findComment-5737394
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

boost leak somewhere could be a gasket leak on the BOV or piping leak of some sort best thing to do is a piping leak test

heres a link of a do it yourself leak test on silvia wa

http://www.silviawa....showtopic=41897

Thanks mate, just put installed new boost gauge and its peaking at 9psi, i think the stock gauge is just f**ked and i just started panicing over nothing. I'm still going to do this test over the weekend to make sure tho :)

Thanks Again

James

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/#findComment-5737738
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

A pod filter makes a bit more noise than a std one, you probably haven't heard your motor sucking like that before????

exactly right mate! I did know you would get a bit of suction noise, didnt expect it to be as loud as it is.

Link to comment
https://www.sau.com.au/forums/topic/359132-boost-problem/#findComment-5739401
Share on other sites

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

    • Nizzy_R34
      r34's love to squeal

      By Nizzy_R34 · Posted

      just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • Duncan
      Engine sputter

      By Duncan · Posted

      My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Duncan
      S1 Autech 260RS Wiring Diagrams

      By Duncan · Posted

      Awesome, thanks for sharing!
    • Duncan
      Nissan fuga 450gt android screen

      By Duncan · Posted

      To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
    • GTSBoy
      Nissan fuga 450gt android screen

      By GTSBoy · Posted

      So, now all you need to do is connect the 2 or 3x 12v feeds into the unit to permanent 12v, ACC 12V and IGN 12V that you can find in the spot behind the stereo, and the earth, and then it will switch on with the car.
×
×
  • Create New...