Originally Posted By ric3xrt
We supply coatings to a GM nascar builder, in a few bench racing conversations, with one of his guys who runs a COPO 427 NA is doing around 1.7 to 1.85 HP per cu in, so you figure he's making between 725-780,according to him.... , now this engine builder has told me, he figures Barton is up around 790-810

S.A.M. Racing (School of Automotive Machinists) says a 427 LS7 COPO makes 730 to 740 HP from GM and the work they did to theirs has made 825 HP.