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So Something Broke...

Bill

By Bill,
in Engines & Forced Induction

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Bill Collaborator

Bill

Posted
Posted

Just after peoples opinions on this.

I was out driving yesterday and about 1/2 hour into the trip I tried to acellerate up a hill and noticed I had bugger all power.

It feels like I have 1/3 or less the power that I normally have, it takes over 5 seconds to acellerate from 90 to 100 :blink:

I didnt hear or feel anything happen, the motor still runs and idles smoothly but has bugger all power.

The boost guages (factory and eBoost) both show vaccume but neither will rise above zero when under load.

When the load / revs is in the area where it would normally produce boost it emits some white smoke. I guess this is cause its now running quite rich without the extra air?

So my questions are, what can I look for that may indicate what the problem is? Does a blown turbo exhibit these symptoms?

Could it be something else like the eBoost?

Some basics

- RB34 GT-T

- FMIC

- PowerFC

- eBoost

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https://www.sau.com.au/forums/topic/384961-so-something-broke/
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Bsa Mentor

Bsa

Posted
Posted

Pull the dump off and have a look at you turbine if there is one. Like mafia said check cooler piping. Don't drive it untill you find the problem if it is a blown turbo there will be bits of ceramic everywhere if some gets into the motor then hello rebuild. Also is it a rb34 strocker or did you mean r34? Guessing it's a rb25 neo. If it is the turbo then pull it all off including manifold and ensure it's all clean also drop the cat as it will be full of turbine wheel. When my turbo blew made hardly any noise if you have a loud exhaust you wont hear it.

Check list

Check for split /popped silicone hoses

Remove dump check turbo turbine wheel if gone remove turbo and manifold also cat converter

If its neither of these drop the cat it may be blocked and will cause little or no boost

These are my experiences in the past they may help otherwise I'm not sure

Bill Collaborator

Bill

Posted
  • Author
Posted

Pull the dump off and have a look at you turbine if there is one.

If there is one. had to laugh at that.

Will do that when I have some time on the weekend.

Like mafia said check cooler piping.

Had already had a look at the plumbing, could not see anything obvious.

Don't drive it untill you find the problem if it is a blown turbo there will be bits of ceramic everywhere if some gets into the motor then hello rebuild.

Ouch.

I have already driven it over 300km (problem happend far from home).

If the impeller breaks up can it actually make its way past the the FMIC? I would have thought it would have got stuck there?

Also is it a rb34 strocker or did you mean r34? Guessing it's a rb25 neo.

Doh!!!

Yes its a R34 with a RB25. Silly slip there.

Check list

Check for split /popped silicone hoses

Remove dump check turbo turbine wheel if gone remove turbo and manifold also cat converter

If its neither of these drop the cat it may be blocked and will cause little or no boost

These are my experiences in the past they may help otherwise I'm not sure

Thanks, will run through the rest of these over the weekend.

Bsa Mentor

Bsa

Posted
Posted

There is a bearing case that stop it getting anywhere near the cooler haha. It can go back up the manifold and slip into the engine when the valve is opened 9 times out of 10 it won't but still that chance. Also your want to look at the rear housing of the turbo that's the turbine wheel that's the one that will go more then likely if it's not that wheel check the front but I doubt it. By memory its a 6 bolt flange on the dump 4 bolts 2 nuts I think it's a 13 mm spanner bit of a pain to undo but not impossible. Feel free to ask questions if you get stuck

Joe_89 Experienced

Joe_89

Posted
Posted

What exhaust system do you have mate?

If you cant see anything wrong with the turbines, id say that a resinator has collapsed and blocked the exhaust.........or somebody doesnt like you blocked it :rolleyes:

The symptoms you just gave sound exactly like mine when mine collapsed, apparently its common with kakimoto exhausts.

Just drop the exhaust at the downpipe and drive it down the road, you will soon see if it has solved your problems :thumbsup:

  • 2 weeks later...
bubba Grand Master

bubba

Posted
Posted

Ahh that sucks mate (not as much as P-platers writing your car off though). I was running a highflow on the Neo engine in my Stagea, built by a local turbo guru but even something like a Hypergear bolt-on highflow (not one of their huge ones with custom housings) would be an excellent bang-for-buck upgrade. Should be able to get an easy 220-240rwkw out of the standard injectors, was only running 15psi through mine but it certainly made the 2t bus get up and boogy.

Bill Collaborator

Bill

Posted
  • Author
Posted

but even something like a Hypergear bolt-on highflow (not one of their huge ones with custom housings) would be an excellent bang-for-buck upgrade. Should be able to get an easy 220-240rwkw out of the standard injectors, was only running 15psi through mine but it certainly made the 2t bus get up and boogy.

In the end Ive decided to send by old turbo to hypergear to be rebuilt and highflowed.

Seems to be the easiest and most cost effective option given that I dont want to change injecters, AFM, etc.

bubba Grand Master

bubba

Posted
Posted

In the end Ive decided to send by old turbo to hypergear to be rebuilt and highflowed.

Seems to be the easiest and most cost effective option given that I dont want to change injecters, AFM, etc.

Super happy fun sideways time will shortly ensue! :devil:

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