T4 N/A Turbine Housing?
Thread Starter
Joined: Oct 2006
Posts: 6,604
Likes: 17
From: Toronto, Canada
My car must always remain a street summer daily car that just happens to work well on the track 
.
Anyway, I'm starting to think the inconel heat shield was too much for the air cooled ball bearing turbo. Wonder if Turblown has any thoughts?
thewird
.Anyway, I'm starting to think the inconel heat shield was too much for the air cooled ball bearing turbo. Wonder if Turblown has any thoughts?
thewird
The race rotor jets were never intended to be street driven.
thewird
Yes, because it is part of the Mazda emissions scheme- I will try to find the sae papers again. The same could be said of a highflow cat or cat delete pipe.
Its like this...
Racing Beat says they aren't recommended for the street so everyone parrots that.
Racing Beat also says the race 110psi oil pressure regulator is not recommended for the street and luckily Mazda ignored them and put one in the FD anyways.
What is the downside of lower oil pressure at idle and low rpm?
Anyways, if you want to retain high oil pressure at idle and low rpm you can simply put in a relief valve on the turbo oil feed line plumbed back into the sump.
At my work we use Swagelok CA series adjustable relief valves with the viton seals, but you could use the cheaper/smaller fixed pressure series. Just make sure to spec the seals for something that is safe in oil and gas.
Ball bearing turbos especially are designed to run at lower oil pressures and the internal restrictor is designed for piston engine oil pressures, so the pressure drop usually isn't enough for FD and many have had problems with this previously.
This problem is often compounded by the undersized oil drain lines many aftermarket turbo kits used which inhibit drain back to the sump.
You can add more restriction to create more pressure drop, but it would be more ideal to actually regulate the pressure the turbo receives with a bypass.
thewird
Yes, because it is part of the Mazda emissions scheme- I will try to find the sae papers again. The same could be said of a highflow cat or cat delete pipe.
Its like this...
Racing Beat says they aren't recommended for the street so everyone parrots that.
Racing Beat also says the race 110psi oil pressure regulator is not recommended for the street and luckily Mazda ignored them and put one in the FD anyways.
What is the downside of lower oil pressure at idle and low rpm?
Anyways, if you want to retain high oil pressure at idle and low rpm you can simply put in a relief valve on the turbo oil feed line plumbed back into the sump.
At my work we use Swagelok CA series adjustable relief valves with the viton seals, but you could use the cheaper/smaller fixed pressure series. Just make sure to spec the seals for something that is safe in oil and gas.
Ball bearing turbos especially are designed to run at lower oil pressures and the internal restrictor is designed for piston engine oil pressures, so the pressure drop usually isn't enough for FD and many have had problems with this previously.
This problem is often compounded by the undersized oil drain lines many aftermarket turbo kits used which inhibit drain back to the sump.
You can add more restriction to create more pressure drop, but it would be more ideal to actually regulate the pressure the turbo receives with a bypass.
Personally I would never run oil cooled only turbos on rotaries.
Thread Starter
Joined: Oct 2006
Posts: 6,604
Likes: 17
From: Toronto, Canada
Yah, turbine housing is fine. I'm just thinking that maybe the additional heat held in by the shield possibly cooked the oil seals since its not water cooled. It's the only difference between last years setup and this one.
thewird
thewird
Hard to say...
Thread Starter
Joined: Oct 2006
Posts: 6,604
Likes: 17
From: Toronto, Canada
Last year (2010) I ran a 6765 with S cover with no turbo blanket with zero issues. This year I got a new 6765 with the H cover and put your inconel heat shield and had this problem.
The last time I ran a turbo blanket was in 2008 with the 500R-SP and it completely made the turbine housing crack and flake internally. In 2009 I was still running the 500R-SP with no blanket as I was tired of issues.
thewird
The last time I ran a turbo blanket was in 2008 with the 500R-SP and it completely made the turbine housing crack and flake internally. In 2009 I was still running the 500R-SP with no blanket as I was tired of issues.
thewird
