PS1 games didn't have frame rate caps, it was just weaker hardware, but typically the more graphically intensive games would target 30FPS and lots of them actually ran at 60FPS. You should probably do a bit more research next time before implementing arbitrary frame limits that didn't even exist in the original system. Frame issues on the PS1 were due to the hardware struggling, not because they didn't want it to go faster. There was no hardcoded frame lock though.