running a 46 fx with a 11/6 macs pipe cut to specs,??????????(this is my first pipe), start eng runs great, full power not so great,it seems like it takes about 4 or 5 secs to come up to full power,is this norm,i have tryed diff needle setting but the same thing happens, fuel tank is set right,fuel tubings is as short as it can be and good press of the pipe.ok that the heck is it or is this norm..........any help would be great