I have a s/c with 6lb pulley and injen intake on my 98 Camry, and the car runs fine. Better than fine as a matter of fact. I had knock problems also, but the reason for the knock isn't the short ram, it is the fact that there isn't enough fuel going to two fuel rails and as gLok said "weak knock sensors" (I had to get both of mine replaced). The solution to this problem is buying the fuel line upgrade from Jim @ Foreign Affairs. You can reach Jim at this email address:
ForeignAffairs@aol.com
He is another one who has done alot of research on our Camry/Solara. You will find his threads on this topic on Solaraguy.com and Passing Lanes Camry forum. Best of luck.