Having had some challenges getting one of the Mamba wastegates to fit and ending up filing it down so it would work, I contacted Mamba to let them know about the fit problem.
They contacted me today to let me know that they had revised the bracket and wanted to know if I would like to have the updated version.
Since I already altered the part I declined to have a new bracket sent, but I’m glad to see they updated the part so it should have better success for others.
With a number of different turbocharger pairs sitting in boxes, and a good pair on the car, I’ve had trouble deciding what to do next with my S4.
BorgWarner RS6 – FrankenTurbo F21 – TiAL 605
Then there is an incomplete engine sitting in the corner of my garage that will open some opportunities on account of the 2.8 heads and built bottom end.
Engine Cleanup
After several months of no progress on either I took some free time on New Years day to start preparing the car to pull out the engine.
Engine Pull Prep-work
The built engine is not ready so that option is out for now. My goal with the TiAL turbochargers is to have them made over into 770’s, so that leaves me with a choice between the BW RS6 turbo’s:
BorgWarner RS6/K04
Or prototype FrankenTurbo F21 with ceramic coated turbine housings and Mamba wastegate actuators.
Frankenturbo F21 with Mamba wastegate
I’m leaning toward the F21s on account of them being an easy transition from the Turbo Concepts Stage 1 turbos that are presently on the car.
