In the 450's @ 7psi, thats koo, but how much pounds you guys are looking to lay on it, because if @ 7 it will be running with 450 or more than 8 will give it a sure pass of the limit and 8psi is what most people think is basically enough psi. I know your looking for 450 off of the race gas, but it seems you all can make alittle more if ya'll wanted.