tom, if you need more heat from your grill drill out the orifices. find the size it is using your regular drill bits. then drill out one size up. try it for a week. if it's still not enough for you, go the next step bigger. remember you can't go back. this is how i turned all of my grills from lpg to nat gas, of course with an in line regulator too.
dan
in almost all posts i respond to, regarding grills, i suggest an MHP, even though i don't sell them. webbers are fine, just more $$$. guess the mhp would be the axiom of grills, though not scientifically proven:)