427 Big Block power baby. It’s muscle car engine goodness with Richard Holdener, and since we’re talking about Corvette power there are always opinions on what they really need to be the best. Of course the resto crowd is going to swear that some GM engineer did something super trick to design the best cast iron manifolds in history for the 425 horsepower L72 big block, but is that reality? Did they really make manifolds that flowed? Or were they just designed to fit? Richard is testing some combos and you get all the results below.
FULL DYNO RESULTS. HOW TO MAKE 427 CHEVY POWER. HOW MUCH POWER DOES A 427 CHEVY MAKE? HOW RESTRICTIVE ARE THE FACTORY EXHAUST MANIFOLDS? HOW MUCH ARE LONG TUBE HEADERS WORTH ON A 450-HP 427? HOW CAN I BUILD A BETTER 427 CHEVY DRIVER COMBO? CAN I HAVE THE POWER OF A 425-HP L72 THAT DRIVES LIKE A MILD L36 390-HP VERSION. HOW TO MAKE 600 HORSPOWER WITH YOUR 427. ADD THE RIGHT COMBINATION OF AFR CYLINDER HEADS, A HEALTHY CAM AND SINGLE-PLANE INTAKE AND YOU CAN REACH 600 HP. CHECK OUT THIS VIDEO WHERE THE STOCK CORVETTE EXHAUST MANIFOLDS WERE COMPARED TO LONG TUBE HEADERS ON A 450-HP (DRIVER) 427 BUILD. NEED EVEN MORE POWER? CHECK OUT THE 600-HP, AFR-HEADED 427 BUILD UP.