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How To Size Charge Air Tubing
The duct diameter should be sized with the capability to flow approximately 200 - 300 ft/sec. Selecting a flow diameter less than the calculated value results in the flow pressure dropping due to the restricted flow area.
Turbocharger Water Cooling – Thermal Siphoning
Water cooling is a key design feature for improved durability and we recommend that if your turbo has an allowance for water cooling, hook up the water lines. Water cooling eliminates the destructive occurrence of oil coking by utilizing the Thermal Siphon Effect to reduce the Peak Heat Soak Back Temperature on the turbine side piston after shut-down. In order to get the greatest benefit from your water-cooling system, avoid undulations in the water lines to maximize the Thermal Siphon Effect.
Turbocharger Oil Drainage
In general, the larger the oil drain, the better. However, a -10AN is typically sufficient for proper oil drainage
Turbo Oil Restrictors & Oil Supply
An oil restrictor is recommended for optimal performance with ball bearing turbochargers. Oil pressure of 40 – 45 psi at maximum engine speed is recommended to prevent damage to the turbocharger’s internals. In order to achieve this pressure, a restrictor with a 0.040” orifice will normally suffice, but you should always verify the oil pressure entering the turbo after the restrictor to ensure the components function properly. Recommended oil feed is -3AN or -4AN line or hose/tubing with a similar ID. As always, use an oil filter that meets or exceeds the OEM specifications.
Air Filter Selection For Your Turbo
It is important to appropriately size the air filter for the maximum flow rate of the application. A target face velocity of ≤130 ft/min at redline is used to minimize restriction and to provide the turbo with the air necessary for it to function optimally. If the turbo does not have access to the proper amount of air, excessive restriction will occur.
Troubleshooting Garrett Turbochargers
Turbocharger problems are the result of a handful of causes. Do you know them? Well, maybe not. That's when Garrett is coming to the rescue
Turbocharger Bearing Systems
The turbo bearing system may appear simple in design, with one or two bronze bearings, but it plays a key role. Ball Bearing turbo are vital.
Diving into the Distinctions Between Turbo Types
A turbo type can be unique, but fall into a turbo family. Learn more about: Free Floating, Wastegate, Variable Nozzle Turbine (VNT) on Garrett
The Turbocharger Oil and Gas Sealing System
Turbocharger oil leakage is one of the most known cases of turbo failure. Understanding how the sealing system works is mandatory. 🛢️
Webinar – The Smallest CV VNT Developed for Euro VI and Japan PPNLT
Watch this webinar and discover how the smallest Commercial Vehicle Variable Nozzle Turbocharger, GEN 3 GT17 DAVNT has been designed to meet our customer’s requirements referring to EURO VI & Japan PPNLT regulations.
Technical Bulletin 077
Important information with regard to the replacement of Garrett turbo part family 789500 as used on FPT applications
