Jump to content
SAU Community

Boost Spike - Dump Pipe Design For Gt3076r Iw

limpus

By limpus,
in Engines & Forced Induction

 Share

Recommended Posts

limpus Mentor

limpus

Posted
Posted

Good day guys,

I remember reading a thread some time ago about someone wanting to modify their dump pipe for a GT3076R and there were some very useful photos included there...i can't seem to find the thread after 2 hours of searching...can someone point me to that post if possible? I'm having boost spiking issues with me 3076 on a 2JZ and i suspect it could be due to my dump pipe design...

Cheers.

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted

got a pic of your dump? i have a bellmouth style dump on my iw3076 and boost control is fine, altho i think its creating way too much turbulence, considering making a split dump for it.

SLAPS Rising Star

SLAPS

Posted
Posted (edited)

Boost spike?

Are you sure its not boost dropping off?

A spike is a really quick spike of boost not where it peaks up through mid range and drops off at top end. Typically related to preload being way too high or a cheap bleed valve.

If your running IW don't expect spectacular boost control if your trying to push more than 2-3psi more than the actuator is rated at. The same goes for the GT35 IW's.

Best bet for the GT30.. Throw an actuator on it that is rated for the boost level you intend to run of which with cams on pump fuel is around 18-20psi. E85 up to 25psi.

If you dont boost WILL peak up then tail off really quick to a couple of psi (if that) above what the actuator is rated to.

Edited by SLAPS
limpus Mentor

limpus

Posted
  • Author
Posted

Yeah...it is spiking or should i say climbing uncontrollably...i'm trying to keep at at 15-16psi but it just shoots up to 20+ regardless...i even disconnected the actuator arm to see if it was actuator related but its not...boost still shoots way up so that rules out the wastegate...the flap also opens fully so its not that...therefore its pointing to the custom CES style split dump somehow not scavenging the wastegate gases fast enough...it seems that most people running 3076s are running a bell mouth type dump too which might be my next step...

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

    • pogman
      Low oil pressure after WOT

      By pogman · Posted

      I much prefer that to an actual oil pressure issue, never would of thought it would of been a volt drop issue but SAU brains win again. Guess ill be turning down the oil pressure limit for the track and hunting some grounds. Ill hopefully update this thread with some high oil pressure and solid ecu voltage logs. 
    • Murray_Calavera
      Question about BoV on RB25DET NEO

      By Murray_Calavera · Posted

      You've just discovered a really good reason to tell yourself, yes, I do need to buy an aftermarket ECU. Put the MAF in the bin. Slap in the new ECU and have a think about what turbo sounds you prefer.  Do you want a 90's style BOV wooosh? Do you want a hektik tsututututu?  Mate, can't go wrong. Just gotta get that ECU and the world is your oyster. 
    • Kapr
      Question about BoV on RB25DET NEO

      By Kapr · Posted

      Hi. Iam just curisou about this topic. I saw this video. It is about Greddy Type FV2. I know that BoVs are about that sound but how and when to use it? I read some topic here and from what i have understand on stock RB with MAF there will be some "problems" if you use this BoV? It vents the air in to the atmosphere and the MAF on stock car needs this air back in to the intake and not out? Or is it wrong? If so...i saw you can put some adaptor to circule air back...but does that not "loose" that sound? I saw another BoV from Turbosmart and it has two "exhaust" like ports? One is for the stock tubing for letting air back and one is for "sound" and let the air in the atmosphere? Can someone please explain? This is the Greddy one:  And this is the Turbosmart.     THANK YOU!! EDIT: So i read about this topic some more and i if i understand that correctly: That Greddy can function either like BoV or 100% Bypass valve? And that Turbosmart is what they called hybrid so you can adjust what and how many air can be vented out or back in? Is this right? THX!
    • Dose Pipe Sutututu
      Low oil pressure after WOT

      By Dose Pipe Sutututu · Posted

      That dirty voltage drop is the culprit I suspect 
    • pogman
      Low oil pressure after WOT

      By pogman · Posted

      i cant get them all in 1 screenshot unfortunately as i just dont know how to move things around tbh, but they are all from the same log and the line crosses at the same point for all of them
×
×
  • Create New...