I've done that before in my mustangs, having a low one made it run to cold to pass smog easily(it helped when I put the right one in) and I saw no power gain. I figure if you get 3hp out of it then woopdy friggin do and leave it alone. Just my opinion and that is on a different motor anyways. Good luck -Steve Bowen << debating whether or not to get a "cooler" thermostat >>