Jump to content
SAU Community

Gfb Bov = Boost Drop?

QRI05E

By QRI05E,
in Engines & Forced Induction

 Share

Recommended Posts

QRI05E Mentor

QRI05E

Posted
Posted

Hey guys, I just fitted a GFB Hybrid (50% atmo / 50%plumb back) BOV and noticed that my max boost under throttle has dropped by 1 - 1.5psi... is this normal? there are no leaks... i made sure all hoses are tight... even used a gasket between the flanges... and it works perfectly except for the boost drop... i know many of you will say that an aftermarket BOX is a waste of money.. but i got it for a good price thanks to NICKR33...

Any thoughts? hints? suggestions?

Regards,

Sarkis

Link to comment
https://www.sau.com.au/forums/topic/121028-gfb-bov-boost-drop/
Share on other sites
mad082 Grand Master

mad082

Posted
Posted

have you adjusted the spring? you may need to tighten it to make sure its not leaking.

the reason why they feel a little less responsive is that the stock has a hole that allows the boost to constantly leak to keep the turbo spooling faster when idling and decelerating. i blocked this off on my stock bov and it wouldn't hold boost, high in the rpm. it would bleed off from 13psi to about 10/11 psi. i also think that the air recirculating pushes on the top of the bov to stop it opening at high rpm.

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

    • Ozdavroz
      ATCC Amaroo Park 1987

      By Ozdavroz · Posted

      Yep that's pretty much what I want to see. Racecars that look and sound like the Group A but with newer tech underneath to make them faster and safer. I'm sure there's enough VK-to-VN commodore, E30 BMWs and Foxbody mustangs shells around to make up a decent number of cars with hopefully a couple of sierras, rx7 and R31s in there too. 
    • robbo_rb180
      WTB RB25 Gearbox NSW / central west

      By robbo_rb180 · Posted

      Contact Jessestreeter.com/Skevas Racing/JustJap for a new r34 rb gearbox or go a cd00# conversion. No point playing with unknown condition gearboxes.
    • robbo_rb180
      ATCC Amaroo Park 1987

      By robbo_rb180 · Posted

      Such a shame places like Amaroo Park have been redeveloped, smaller tracks always make for good racing. Cheers for sharing @PranK there's some good Lakeside video's too. Its so hard with older the cars as parts are so rare and everything was made for a particular chassis at that point in time. Even the V8 Supercar Blueprint era cars are all different between each chassis within a team as they learnt things and made improvements. The COTF cars between each Chassis builder is different too especially motor/oil systems/intakes. The Group A stuff is worth so much too especially chassis with good history. The only way to do it would be composite panels and similar engine drivelines to the original cars. Ford sierra running Focus RS driveline, Commodore running a short stroke LS/LT or a Falcon with coyote and a H Pattern dog box. Could use a standard ecu across all models with a Torque Map and DBW for parity which is not even used in Supercars currently. Hell a TCM is almost a full chassis car these days and the suspension is not even close to standard style in the front running cars.  
    • Commsman
      spot the stagea

      By Commsman · Posted

      Dashcams Australia (13/05/25) captured JDMHSE (Vic plate) being a right tosser. 
    • Ozdavroz
      ATCC Amaroo Park 1987

      By Ozdavroz · Posted

      Wish someone would start a racing series for Group A replica cars, a bit like Touring Car Masters but for 1985 onwards and not grandpa's falcon and/or Monaro. I know they race in some historic class but that's for original cars, no replicas allowed.
×
×
  • Create New...