I did not write this but I found it over on a grand prix site but is is sound princaple and can help us. Have you ever wondered why the factory thermostat has a small hole with a bead in it. The main reason for this is because it lets traped air out and a tiny amount of coolant out when the thermostat is closed and allows earlier opening. Lets say you ice the manifold down and the thermostat is closed at the track you stomp it at the light the water around the cilinders gets very hot and coudl result in detonation because no water is circulating because the thermostat has not had a chance to open up yet. If you drill 4 very small holes mabey a .05 inch or 1 mm hole in the thermostat it will allow a small amout of water to flow out of the thermostat alowing it to open sooner and keep the engine at a more constant tempeture and and allow more power. It will only afect the over all temp 5 degrees.