Jump to content
SAU Community

Rb25 Boost Leak

Rbvl

By Rbvl,
in Engines & Forced Induction

 Share

Recommended Posts

Rbvl Apprentice

Rbvl

Posted
Posted

Hi I am pretty sure I have a bad boost leak I blew an intercooler pipe off hitting 15 psi in second gear I then put the hose clamp back on the rubber fitting and tightened nice and firm and ever since then it has only made about 1 psi of boost, u can't really hear the boost leak in the car but when idling with the bonnet open you can hear it sucking while the engine is under vaccume it sounds like its coming from the inlet manifold around the far right hand side would I be right in thinking that it could be the inlet manifold gasket it seems to have a thicker gasket than usual its about 3 mm thick or is that normal ?

Cheers

Link to comment
https://www.sau.com.au/forums/topic/426632-rb25-boost-leak/
Share on other sites
AngryRB Grand Master

AngryRB

Posted
Posted (edited)

yes the plenum gasket is about 3mm thick, after constant issues im fitting a cosmetic gasket recommended by KudosMotorsport, im quietly confident it will solve the issue. Apparently this is a common issue when running high boost, mine was sounding like a cat Meowing under boost.

Edited by AngryRBGTX
Link to comment
https://www.sau.com.au/forums/topic/426632-rb25-boost-leak/#findComment-6883036
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

    • ARB26
      RB26DETT Sketchy boost mod?

      By ARB26 · Posted

      Thanks Duncan, that's the best info I've read. Furthermore after learning about the PCM programming side controlling the factory boost solenoid, the purpose of the solenoid is to "bleed" boost when pin 25 is earthed, thus allowing spring pressure in the wastegate actuator to overcome diaphragm boost pressure, thus closing or reducing the position of the wastegate flap creating more boost as the turbo is able to spin faster. It's pretty cool to see a designated Pill to do exactly this, would have liked to have seen it with a tiny filter over the end for those moments in vacuum.  The constant bleed pill has now been removed completely from the system and solenoid boost control has been restored once again.   Case closed 😂
    • GTSBoy
      Cas issue

      By GTSBoy · Posted

      The wideband reading is meaningless if it's not running. Why are you using shitty old sidefeeds on any engine, let alone a Neo? What manifold and fuel rail are you using to achieve that? Beyond that, can't help you with AEM stuff as I've never been their ECU/CAS combo.
    • Duncan
      RB26DETT Sketchy boost mod?

      By Duncan · Posted

      Manual boost controllers (where a little of the boost was bled off) were quite common back in the day, because they were cheap and easy. Generally they had a manual adjustment screw rather than being fixed like yours. Down side is they always bleed boost, not just when you want them to so an electronic boost controller that uses a solenoid will have less lag.
    • nash47
      Cas issue

      By nash47 · Posted

      Hello , im new here and i have A31 home build  RB25det neo stock eng / turbo  aem ems 2 blue connector  aem 3.5 map aem cas disk aem wideband connected to ecu  355 lph pump 550 nismo yellow injectors side feed aftermarket regulator  and won’t start with base aem tuner basic tune eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle  Now it won’t start Wideband reads 10 and 11 at lowest fuel setting  and will share calibrations soon for aem tuner i think something is wrong in aem tuner    please if you have any information, am very grateful         
    • nxh
      R34 4 door side skirt identification

      By nxh · Posted

      Legend. I ended up finding the facebook account of the owner of the first car i sent but sadly he deactivated the account. I think you’re right in saying it’s some sort of well done custom job. Really appreciate your help anyways.
×
×
  • Create New...