This is not the first time I've heard that A/C in a GT40 suck or ain't quite up to par. As far as mine is concerned it does great. Mine get so cold that when my wife is riding with me she complains that it is too cold. That even happened a lot back in Arizona. I have never had an issue with the A/C temp in my GT. I have looked at many other GT's and I seem to think it is because they have poor cockpit sealing around the doors or no insulation. I will say that my GT is well insulated and my doors seal very well. I even drilled holes in the spyder and filled it with foam. Another thing my A/C has is a fresh air vent that runs direct to the inside unit. That is something most GT replicas don't have.
So plug up those air leaks and I bet it will help heaps.
Hersh
