There are critical areas to be aware of on a compressor map.
Compressor side of turbo.
This is a commonly confused issue but important to understand.
Since the pressure on each respective side of the turbo acts on the back face of each wheel the pressures tend to pull each wheel away from the other.
Machined from lightweight non conducive materials such as aluminum the cool side of the turbo called the compressor is where clean ambient air is gathered and forced into combustion.
By using this otherwise wasted energy to increase the mass of air it becomes easier to ensure that all fuel is burned before being vented at the start of the exhaust stage.
In most applications the compressor is ingesting air at slightly more than ambient temperature but the temperature rise across the compressor can be substantial as explained in turbocharger basics at the beginning of this article.
On the 10mm bolt holes on the inside of the compressor housing whichever set there are 2 makes it so that the wastegate actuator rod doesnt interfere with the brackets oil lines etc.
The oil breather vents right there is this a problem.
Stocker has provision for an inlet bell.
Unfortunately outside debris making its way across the blades of a compressor wheel the intake side accounts for 80 percent of all turbo failures.
The compressor side of a turbocharger faces significant thermal stress and fatigue challenges.
Just make sure to get a beefy set of 90 snap ring pliers i used a nice set of snap on ones and soak it in wd40 for about 1 hour as in let it sit for 1.
Oil may be seen inside the turbocharger inside the compressor or turbine on either side of these respective housing seals.
The thrust surface for the compressor end is the bearing surface closest to the turbine and vice versa.
Compressor maps are typically shown as contour plots with the islands representative of the compressor stage efficiency.
This is the compressor side of the 1986 87 stock turbo left and the te44 turbo right notice the the wheel for the te44 is bigger with equal length compressor blades unlike the staggered blades on the stocker.
The seals function foremost to prevent pressurized vapor from turbo operation from entering the engine crankcase.
Or it s just messy and no biggie.
The two areas that can cause damage to a turbocharger are the surge and choke areas said jim rufini applications engineer for borgwarner.
The oil breather filter would clear up the oil problem but then there s no positive crankcase ventilation is there.
I noticed the oily film in the turbo inlet while having it apart yesturday.
When this failure occurs the leading edge of the compressor wheel s blades will indicate any impact from the object s and the inducer bore what the compressor wheel sits in may show signs of contact or scarring.
As the hot turbine side is being driven by the exhaust energy the cold intake turbine the other side of the turbo compresses fresh intake air and drives it into the engine s intake.
