Higher FPS, Constant Speed

[sagaevan]

I'm playing LBP, and after a scuffle about the game running at around 500% the right speed and figuring out I was just holding down a button that made it do that on accident, I now run the game at the proper 100% speed. Unfortunately, that means 30 fps, along with some stutter for no reason (even though the fps remains the same??). I was just wondering if there's a way to raise the fps and keep the speed at 100%.
Thank you for the reply in advance.