I once read that you can put Corolla 89-2000 models AC fan & its motor in cultus, which has a much higher air throwing speed.
And another one to put relays on your AC fan to make it work faster.
I know that its just making the air flow higher, but logically the faster the air is sucked in, cooled off and then thrown back in the car, the better the temp will be.
But its just theory, Haven't heard if this also works as well.
Just my 2 cents