A/C Blower Fan

[mgbrv8]

Im researching on how to get more performance out of my Blower fan so I can get more vent pressure. now while investigating I found that the red wire on the blower resistor got very very hot (depicted in the picture). Is this normal or is this a sign of a relay going out? I cleaned the motor and fan and oiled the motor also and still no improvement. Is there a upgrade I seem to remember someone installing a suburban blower motor once but I cant find anything about it.

Dave