Starting on New Years Day I am taking advantage of some extra free time to get ready to swap the Frankenturbo F21s into the S4.
![FrankenTurbo F21 version 3 Audi B5 S4 turbocharger](https://myaudis4.com/wp-content/uploads/frankenturbo_f21_v3.jpg)
![S4 Engine Pull Preparation](https://myaudis4.com/wp-content/uploads/engine_pull_f21v3.jpg)
The S4 sits on a set of dollies so it can move about the garage easily for positioning. The car is at an angle in the garage when the engine hoist removes the engine.
![S4 Engine Pull Preparations](https://myaudis4.com/wp-content/uploads/ft21-1.jpg)
Spending Friday evening removing the engine.
![S4 engine out](https://myaudis4.com/wp-content/uploads/ft21-2.jpg)
Saturday is turbo swap day. This took a bit longer than usual on account of the Mamba wastegate bracket on the passenger side being too big.
![Mamba Wastegate Bracket](https://myaudis4.com/wp-content/uploads/mamba-1.jpg)
Some cutting and filing of the bracket is done so that it will fit in place because the unmodified bracket contacts the cylinder head and/or starter.
![Mamba Wastegate Bracket Modified](https://myaudis4.com/wp-content/uploads/mamba-2.jpg)
On go the new F21s.
![Frankenturbo F21v3 Driver Side](https://myaudis4.com/wp-content/uploads/ft21-3.jpg)
![Frankenturbo F21v3 Passenger Side](https://myaudis4.com/wp-content/uploads/ft21-4.jpg)
Before installing the engine the wastegate preload is set to 12 psi. The setup is using the Yellow springs from the Mamba collection of springs.
![Mamba Spring Preload Chart](https://myaudis4.com/wp-content/uploads/mamba_preload-chart.jpg)
Finally on Sunday the engine is installed.
![B5 S4 Engine Install with FT21 v3 turbochargers](https://myaudis4.com/wp-content/uploads/ft21-6.jpg)