[Aslet]

I am in the process of troubleshooting an overheating issue on my 944 track car. While talking to some 944 spec racers, I heard about drilling holes in the thermostat to improve coolant flow. Apparently they drill two 2mm holes. I have also heard of a smaller size hole being drilled to aid bleeding the coolant system (to allow air to pass through before the thermostat is fully open).

If I didn't hear it from multiple people I would say it is crazy, but maybe it helps on a track car? Can anyone on here add confirmation that this is done? If anyone has done it, where do you drill the holes?

Thanks!