I recently bought Borbet Type E's for my 4th Gen Max. I had them put Pirelli P7000 Supersports on with it as well. However, I cannot find the proper pressure to keep it at. On the sidewall of the tire, all it says is do not go above 52 psi. No instructions came with the tires so I have no idea. Right now I have the front two at 45 psi and the rear two at 40 psi. It still feels a little sluggish. Someone please help.

 

Those sound a little high.
As long as the new tires have the same load rating (which they almost certainly do) as the OE tires, you should run the OE spec tire pressure. Personally, I'm running about 34 front 32 rear on my car.

Experiment with what gives the best handling and wear. But, I would still say what you listed is pretty high.