Jump to content
SAU Community

turbo performing poorly after a few minutes operation

Aeris

By Aeris,
in Engines & Forced Induction

 Share

Recommended Posts

Aeris Enthusiast

Aeris

Posted
Posted

Hey everyone!

My turbo seems to not be functioning as efficiently after a few minutes of operation, for example, under low boost setting, it'll hit max boost in first gear fine, then after a while won't be able to spool up over 0.8psi, it has only started doing this recently, a friend suggested that it could be the fuel pump causing these problems, or possibly the ignition coils... could this be true?

I did do a search on this topic, but alas couldn't find any help, so any help is greatly appreciated!

rob77 Veteran

rob77

Posted
Posted

i ran 12psi (0.8bar) through my stock turbo using a blitz dual sbd boost controller for about a year before i upgraded. I wouldnt be trying to force more boost than that on the stock unit otherwise you might find the ceramic exhaust wheel in your cat and then you'll have no boost. My question to you is what boost controller are you using? electronic or a manual bleed valve? Anything to check might be the spring on the wastegate actuator, maybe the spring is getting weak and cant hold the gate open as well anymore?

cameron Mentor

cameron

Posted
Posted

He said 0.8psi or did you mean 0.8bar Aeris ?

Could be 1 of 2 things that Rob77 mentioned. Exhaust wheel is already in the cat or spring is flogged out on the actuator which carn't hold the gate "closed".

Or maby the actuator arm has come of the gate's flap which is just staying open and not causing boost pressure to rise. - easy to check just have a look at the turbo and you'll see.

:cheers:

Jun

Al Grand Master

Al

Posted
Posted

Fellas, i don't think you have understood the problem, unless i have mis-read it. The boost is fine every morning, until he does a few k's, then the boost plays up.

This can be the spring in the waste gate though, due to the metal in the spring becoming that little bit softer when it heats up. It can also be you BOV, if stock, for the same reason. Another cause may be a hairline crack in your piping, ic, or pleneum, and when these heat up the crack is allowing boost to escape (highly unlikely though).

Are you hearing any squeals/noises when boost is not being reached?

I have never experienced this fault and am not a mechanic, just some simple logical thoughts :cheers:.

Aeris Enthusiast

Aeris

Posted
  • Author
Posted

Hey....

it's definately 0.8psi, not bar...

it does work when i begin, and then eventually stops.. checked the cat, and there was nothing in it, not being an expert with turbos to me the turbo looks stock

i have a wold 3d ecu, turbosmart dual stage boost controller, turbosmart dual port BOV,

the problem is only recent.. if it's the wastegate, what would i need to do, to fix this problem?

thanks for all the help

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

    • PotatoCake
      Is r33 gtr steering wheel the same as the gtst?

      By PotatoCake · Posted

      You have just offended every teenage boy in America
    • GTSBoy
      R32 GTST - 600KW+ RB28/CD009 Build

      By GTSBoy · Posted

      Structured text and other high level PLC programing languages are not allowable in Functional Safety. They are very difficult to audit. My PLC stuff is almost exclusively oriented towards Burner Management Systems which are a particularly pernicious form of Safety Instrumented System, when implemented in an SPLC. Even the part of the code written to work in the non-safety logic part of the PLC, like with a Siemens S7-1500 series, still needs to be treated as if it was safety code, with access restrictions, code fingreprints and the like. And Allen Bradley can go EABODs. They ae full of shit. They have this whole lie going on where they say if you use a ControlLogix controller and its IO, and then just duplicate the IOs (ie, run in series or parallel depending on type, to try to make it "fail safe") and "use these programming styles and place these restrictions on what you do" that you can achieve SIL2. What a load of crap. They just get away with it because no-one in the US seems to understand the first thing about Functional Safety and carries on as if all they have to do is buy only SIL2 rated equipment and hey presto, it's a SIL2 system. Idiots. /rant
    • MBS206
      Magnetic Drain Plug Snapped in Half

      By MBS206 · Posted

      If you're really considering leaving it, a great question to ask is, is the magnet going to stick to the sump? The answer to the above is the same answer towards if I'd have any level of comfort leaving it... Personally, based on the cost of a motor if the magnet were to cause damage, I'd be fishing it out either way. Use the methods in here. It fit in through the plug hole, it'll come out.   PS, get a small actuatable claw for a bore scope. OR if you know a vet, they have really cool controllable scopes with hooks on the end. Supposedly they're like playing a video game. Ask if they can acquire you one of their scopes... Engine oil after all is just a different type of lube right? Will only make it easier on the next dog or cat...
    • MBS206
      R32 GTST - 600KW+ RB28/CD009 Build

      By MBS206 · Posted

      All other (Boolean) logic functions though, are just built on those blocks above. Which does give you a lot of functionality in logic. It is basing that on using thresholds with analogue signals like GTS alluded to.   Not having things like timers will make it less useful for some of the ramp up logic you'd want, and again, on Haltecs capacity specifically, I'm not across anymore what you can / can't do with different tables.   I'm assuming, with your logic you want to implement, not only do you want your timing safeties, you're wanting to be able to derive the duty cycle for your solenoid, to maintain I'm assuming 175PSi? Or are you using a standalone WMI controller to maintain the DC correct, and you just want the Haltech working out which fuelling maps you should be on?
    • MBS206
      Low oil pressure after WOT

      By MBS206 · Posted

      It doesn't seem to follow revs. Oddly it seems to follow TPS a little bit from what I can see, but with some delay a bit. IE end of the graph, when he lets off throttle fully, pressure drops a lot, then slowly builds back up, but rpm is on a nice cruisey drop off. I do agree though, it seems very electrically.
×
×
  • Create New...