Give John of M&H a call at 1-661-324-4773 or 1-661-324-4772. He is as knowledgeable of the M&H tires as anyone you will ever find. He will probably have a few questions for you so be ready. He'll be able to tell you where to start for pressure and how to fine tune it for your car and different track surfaces/temps.
Or you can go to http://mandhtires.com/store.php and click the "contact us" button to send him a note. Personally I'd call. They are in California so call according to their time zone.