Frankenturbo F21v3 Swap Complete

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
FrankenTurbo F21 version 3
S4 Engine Pull Preparation
S4 Engine Pull Preparation

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
S4 Engine Pull Preparations

Spending Friday evening removing the engine.

S4 engine out
S4 engine out

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
Mamba Wastegate Bracket

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
Mamba Wastegate Bracket Modified

On go the new F21s.

Frankenturbo F21v3 Driver Side
Frankenturbo F21v3 Driver Side
Frankenturbo F21v3 Passenger Side
Frankenturbo F21v3 Passenger Side

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
Mamba Spring Preload Chart

Finally on Sunday the engine is installed.

B5 S4 Engine Install with FT21 v3 turbochargers
B5 S4 Engine Install with FT21 v3 turbochargers