I am setting up antilag and I have no ability to do an ignition cut. So to emulate an ignition cut I am setting ignition timing extremely negative to induce a misfire.
Where would the valve exotherm temperature peak? 0, -45, -90 degrees timing?
I'm imagining if you set it too late and the exhaust valve is closing and you ignite the fuel, it will cause a very hot edge on the valve. But if you ignite it even later most of the fuel should be out of the cylinder already, so you will only get a very small amount burning as it passes the valve edge. This will obviously depend on valve/cam timing, but I'm after a general answer.
Thoughts? Edit: By -90 degrees timing, I am referring to 90 degrees AFTER TDC. Eg on the down stroke of the combustion cycle.