Red R6

Bearing might be going, I would check the shaft play

Considering the real cost price of one from china I can get them for im seriously considering ordering one

I have just recently had a wheel alignment done to my car as the steering wheel was pointing to the left and now its pointing to the right, anyone know why right after a alignment it would do this again?. I had much higher expectations from them since they seem to be well regarded.

Why not get a roll or two of exhaust tape and wrap the intake pipes then stick a temp probe just before the intake manifold and see if it makes a difference?

Iv been told that tractor sound is because some exhaust leaks past the seperator and goes out through the wastegate screamer pipe. If you had a external gated turbo you wouldnt have this problem.

I had a screamer on a previous car after a week I got it welded back into the exhaust

Its not about right or wrong I just want people to understand there is a risk by not having some form of bov. I posted the garrett link due to the amount of turbo's they handle each year and is a good source for all sorts of info (if you want to get right into turbos they have compressor maps there too so you can pick the exact turbo you need rather then going through what you have in your sig "You need to replace your tuner. Pretty common fault on these cars"). With regards to the thread it may be hard to find exact cause due to the possible sources of failure as you would know and the fact that I doubt many here would have send their broken turbo's to places like MTQ or Garrett when they fail to find the exact cause.

The reason I say different mods is 2 psi will put less pressure on the turbo the compared the other extreme 30psi. Can you understand what im trying to say?

The point im trying to get across is that there is the potentual we all have different mods and boost levels and it isnt somthing we need to consider before removing the bov. Turbosmart link - The pressure within the intercooler piping continues to increase until the compressor reaches its pressure limit. When it reaches this limit, it cannot flow the air any more and the built up air pressure inside the intercooler and pipe begins to flow backwards through the compressor which is trying to flow air forwards. The result of this reversal flow of air is the immediate deceleration of the turbocharger and a high load on the bearings which support the compressor/turbine shaft. At low turbo speeds and low pressures, the deceleration of the turbo and the load on the bearings is low, I.e. a small amount of fluttering at low engine speeds and throttle movements is negligible. At high turbo speeds and high pressures, compressor surge during a gear change can be damaging to the bearings of the turbocharger as the deceleration rate of the turbocharger is high and the reversal airflow through the compressor is high

Read the conclusion above it support garretts view turbo smart and GFB's view too http://www.turbosmart.com.au/technical-articles/flutter-compressor-surge/

So you agree now that compressor surge does affect turbo life?

Jumper leads Is actually a really good idea, nothing worse then having some leads are not quite long enough

Its not like we won lotto or anything we saved it up in their bank account then withdrew it and invested it, still doesnt seem right to me but we will see what happens

Yea, im going to try the credit union through work they seem ok, if that fails I might post and ask for broker recommendations

Im not sure about a broker, Last time I used one they tried to screw me on interest rates, they must have throught I was stupid or somthing

Banks are seriously pissing me off, because myself and my wife invested some money privately the banks wont let us have a home loan, we are told we need to leave it in one of their account for 6 months.....complete bullsh*t if you ask me

Most aussie stuff is good but when americas are involved the quality can very quite a bit

The theory behind the turbo oil filter is sound, it just isn't very accessible and someone at ford forgot to put it in the workshop manual to clean/ replace them. I understand that car makers have lots of pressure to reduce running costs and make them more appealing to the mainstream public someone at ford just made a mistake.

That's part of what I was trying to say those opposing forces on the turbo while its still spinning that can cause the damage but damage will depend on turbo condition and the amount of boost being made e.g. 5 psi wouldn't put anywhere the stress on it compared to say 30psi. I just don't want to see anyone's car broken by something that's preventable

I have had a turbo car for over 9 years before my xr6 Im not new to turbos, I understand what Ralph is trying to say but if he doesn't want to believe what Garrett is saying then there is no point debating further. I will post a link to the turbosmart site later. I still intent to hang around and contribute but I do encourage everyone to do a simple Google search when they get a chance Cheers

Did you read the red writing about how it can occure when the plum back BOV is too small/restrictive aka blocked. that's why you hear that flutter sound, the air is trying to force its way out and the turbo is still spinning and making pressure, it takes a few moments for it to slow down and the turbo to stop sucking air.

Hey if you know something about ceramic coating turbo feel fresh to share I would love to learn more

Compressor surge is when the air pressure after the compressor is actually higher than what the compressor itself can physically maintain

I had a read and Nizpro is welcome to believe what it wants but I will stick with what the engineers at Garrett say Q. What is compressor surge? A. The surge region, located on the left-hand side of the compressor map (known as the surge line), is an area of flow instability typically caused by compressor inducer stall. The turbo should be sized so that the engine does not operate in the surge range. When turbochargers operate in surge for long periods of time, bearing failures may occur. When referencing a compressor map, the surge line is the line bordering the islands on their far left side. Compressor surge is when the air pressure after the compressor is actually higher than what the compressor itself can physically maintain. This condition causes the airflow in the compressor wheel to back up, build pressure, and sometimes stall. In cases of extreme surge, the thrust bearings of the turbo can be destroyed, and will sometimes even lead to mechanical failure of the compressor wheel itself. Common conditions that result in compressor surge on turbocharger gasoline engines are: -A compressor bypass valve is not integrated into the intake plumbing between the compressor outlet and throttle body -The outlet plumbing for the bypass valve is too small or restrictive -The turbo is too big for the application I understand Nizpro are well respected people but I will take a Garrett engineers word over Nizpro's anyday http://www.turbobygarrett.com/turbobygarrett/faq

Putting all brands aside the theory is like henz said, the smaller the injector the more accurately the injector can be controlled eg dont get a 1000cc injector if a 600cc is all you will ever need