The turbo package uses Garrett’s reverse rotation wheels to make a unit that fits as well as the OEM parts. The turbos use a conventional high-quality dynamic bearing center section much like the OEM turbos.
The new Garrett turbos have an internal wastegate like the OEM turbos, but introduce the exhaust flow into the exhaust system in a more efficient less restrictive way. Good wastegate flow can really improve both power and response in an internally wastegated turbo.
The CFD optimized compressor and turbine wheels of the Garrett turbos are larger, lighter and are more efficient, especially at higher than stock boost pressures. The compressor wheel is machined from a forged billet for improved strength which allows for thinner blades for more aerodynamic efficiency. The compressor and turbine housings are also optimized to the wheels. The turbos flow 22% more than stock and can support close to 300 hp per turbo.
The compressor has a .56 A/R housing with a 62 trim wheel. The turbine side has a small .45 A/R housing with a largish 80 trim turbine wheel. This is pretty unusual and is pretty close to axial flow for the turbine. Perhaps this is some of Garrett’s latest technology!
When looking at the compressor flow map, you can see that the Garrett Powermax F-150 Ecoboost upgrade turbo flows much better than stock!
To start our evaluation of the Garrett intercooler we needed to first get some baseline temperature data from the stock intercooler. We collect this data by inserting thermocouples in the inlet and outlet sides of the intercooler. We start this process by loosening the couplers which are very easy to access from under the car.