Inlet manifold thermostatic valve removal

This is a request for information concerning the removal of the intake manifold thermostatic value and abatement of the coolant flow through the intake manafold. I have disconected and discarded, for the most part, the emmisions systems connected to the fuel system. I was looking for tesitimonials on the removal of the thermostatic value and coolant flow through the intake manafold. My concern is low temperaature operation during the winter months connected with living in the northwest. Purportedly, the value is supposed to maintain a constant 150 degree temperature of the coolant through the manifold, however, I have noticed power loss at higher engine temperature operation and tend to regard this system as suspect in the optimal mixture flow at higher temperature operation.

Any opinions or tesitmonials welcome...

Keith