Half bridge port on stock ecu.

[N.RotaryTech]

Taking out the s4 engine from the parts car.
This is what came out of the manifold when I took it off.

The engine only had 8 miles put on it from the last time I rebuilt it, and that manifold was clean I thought.

Engine out.


Result of Dremel tool meeting the old, worn pilot bearing.


Parts.




Smoothing the edges, primaries.


Small amount of porting and lots of oil build up.


Secondaries. Before.