My ac seems to get cooler at higher rpms. I looked online and it appears to be the orifice tube...any thoughts or suggestions. Thanks

 

That would be quite unlikely.

 

Any suggestions would be helpful.

 

There are a number of things that might account for your vague description.

You really need to get gauges on there and measure the system pressures and the temperature under the varying conditions. Otherwise, you are just guessing.