I made some good progress toward moving on from the FrankenTurbo F21’s to the TTE 550’s. Engine was removed along with the driver side FT21. I’m hoping to have the second FT21 removed today so it can be shipped back to FrankenTurbo for some porting of the turbine housing. (We’re interested in seeing if there is an affect on exhaust side back pressure with porting of the turbine housing). These will come back for additional flowbench testing in addition to another run on the S4.
One FT21 removed
In order to recycle my coolant I collect it in the rectangular box (1), transfer it to the plastic jug (2), and then run it through a coffee filter back into a coolant container (3). Because the filtering process takes a while I have two going at the same time and refill the funnel when I have a break doing other tasks on the car.
Next to be evaluated in my search for the best stock motor turbocharger is The Turbo Engineers TTE 550.
The TTE550 uses a center that is similar in dimensions to the RS6 center, but with a slightly larger compressor wheel and clipped turbine wheel. This center is then packaged in the RS4 K04 housing.
TTE 550 Compressor Housing & Wheel
TTE 550 Turbine Wheel
At the current currency exchange rate the TTE 500 shows up new with a price tag of $3,184, not including shipping. My expectations are high for a product that demands such a price premium over some of the alternatives.
