Which cylinder runs hottest?

[EspenW]

Trying to determine where to mount a knock sensor for a stand alone knocklite.
Any ideas as to which of the 5 cylinders that runs most hot (thus most likely to knock)?

[iain1067]

i think it's the rear one

[A80Avant]

my previous mechanic had told me that the cylinder on the 5cyl engine that gets more stress is the 3d,that is why there are usually cracks there

[EspenW]

Hmm, from an air cooling perspective, the rear one will see the least airflow. However, the middle ones sit next to the turbo and the middle of the exhaust manifold.

Knock Sensor I listens to cylinders 1-3, while Knock Sensor II listens to cylinders 4-5, so #1 takes input from the most. Will probably use that signal for the knocklite.