Jump to content
SAU Community

Boost Stability

Race__24

By Race__24,
in Engines & Forced Induction

 Share

Recommended Posts

Race__24 Experienced

Race__24

Posted
Posted

Ok, I have recently installed a Blitz SBC I-D boost controller and now the boost won't stay below 10PSI at high RPM, even with the controller turned off.

Any ideas?

I plummed a hose straight from the IC piping to the actuator and boost stayed at 8PSI. Re-plummed the controller and it still creaps up over 10PSI. I've double checked the connections to the controller etc.

The controller restricts some air as it passes through(when turned off) but i wouldn't think it's enough to cause this.

I'm stumped as to what it is so i thought i'd throw it out there and see if anyone else has had the same problem.

Some ideas that i've had are:

A hole in the hose between the boost controller and the actuator

faulty actuator

faulty boost controller

But basically i have no idea!

If anyone can help it would be greatly appreciated

Thanks :)

Link to comment
https://www.sau.com.au/forums/topic/83026-boost-stability/
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

    • PranK
      Returning after a long time!

      By PranK · Posted

      Nah its a server spammer thing  Although, now that I manually approve all the accounts I can probably loosen up some of the restrictions.  
    • CEF33Y
      Report that engine failure

      By CEF33Y · Posted

      Thread bump, again! Although, no bad news this time. Posting for the sake of possible root cause. Basically, I rebuilt it (mostly stock), installed Haltech + sensors, had it running fine on new ECU.  Still not really understanding why it cracked pistons last time. Got to tuners, and while checking timing, noticed +-10deg of timing scatter while revving. Changed CAS, and it was rock solid. While not definitive, can't imagine seeing 20+ psi with that amount of scatter would be a good thing. Also glad I found something.   Bit more of a run down; Carried out a stock rebuild, a set of stock pistons, out of a spare bottom end. Everything stock apart from head studs and oil restrictors. (so I can pretend I didn't let the Nissan out, ha.) Armed with the measuring gear and FSM, set about doing overhaul. Oil restrictors as per oil control thread for a RB25, stock oil pump, drifting. Head drain/vent from rear of head, to passenger side of sump above oil level. Two dash 10 vent lines from drivers side of sump (unused atm) Hi octane style cam cover breather kit Splash covers over last 2 cam caps. Both breather lines from cam covers to vented to atmosphere catch can, not plumbed back into sump (wanted to see what it was actually breathing). Got it run in (did about a 1000km) no to low boost scenario, As I had questions over old ECU setup. Installed haltech +sensors for flex Retune on E85 (finding CAS Issue along the way), made 300rwkw at 20psi, out of wastegate. Did a drift day the next day (yes, it was a big weekend!) and was checking catch can throughout the day, ZERO blowby. I mean nothing. Lines from cam covers are not even wet. Done a bunch of street driving, spirited and catch can is still dry. Early days I guess, but pretty happy so far. Also now run 10w60, up from the 10w40 that I used to run. Oil pressure is significantly better, especially when hot (as you would expect)      
    • GTSBoy
      Returning after a long time!

      By GTSBoy · Posted

      Done
    • Shizu
      Returning after a long time!

      By Shizu · Posted

      Thanks buddy. I thought it was a server storage thing. 🤣
    • TheBushKangaroo
      Hello fellow enthusiasts

      By TheBushKangaroo · Posted

      Perfect! Thanks for this, both look like great options!
×
×
  • Create New...