Parting Shot!

FROM "FLATHEAD JACK"

OVER THE YEARS OF FLATHEAD HOT RODDING THE ENLARGEMENT OF THE INTAKE AND EXHAUST VALVES HAS ALWAYS BEEN A MUST DO IN ANY WELL BUILT ENGINE, MORE FUEL IN, MORE EXHAUST OUT. THE TRUTH IS, THE FLATHEAD ENGINE FLOWS THE ‘SAME WITH THE VALVES IN IT, AS IT DOES WITH THE VALVES OUT.” JUST 1.5… SEEMS OLD HENRY KNEW WHAT HE WAS DOING WHEN HE DESIGNED HIS OLD MASTERPIECE WITH THOSE “OH-SO“ SMALL VALVES, SO, WHAT MAKES THOSE FLATHEADS SO SNAPPY WITH A BIG CAM, CORRECT SPRING PRESSURES AND THOSE LITTLE INCH AND ONE HALF VALVES ?
VELOCITY…

TODAYS BIG COMPANIES LIKE EDELBROCK CORP. WITH THERE EXTENSIVE FLOW TESTING TO IMPROVE THE PERFORMANCE OF THEIR STREET CYLINDER HEADS HAVE DISCOVERED THAT THE LARGER PORT DOESN’T ALWAYS MEAN MORE HORSEPOWER, THIS INTERESTING PHENOMENON IS ESPECIALLY TRUE IN THEIR STREET ENGINES WHERE THE SMALLER PORT VOLUME EQUATES TO A HIGHER VELOCITY. THE SPEED OF THE MIXTURE DETERMINES HOW TIGHTLY THE COMBUSTION CHAMBER IS PACKED, THE MORE TIGHTLY PACKED THE COMBUSTION CHAMBER THE MORE PRESSURE IS DEVELOPED WHEN THE MIXTURE IS IGNITED, PUSHING THE PISTON WITH MORE FORCE FOR MORE POWER. TEST SHOW, THAT OUR NEW POWER-FLO DESIGNS WITH EXTREME UNDER-CUT POLISHED HEADS AND OUR NEW QUICK-FLO 5/16″ AND 7MM “NITRATED” DESIGNS ARE EVEN LESS OF A RESTRICTION ALLOWING THE PORT TO FLOW EVEN MORE, FILLING THE CYLINDER BETTER AND PRODUCING MORE HORSEPOWER. IN THE FLATHEAD STREET APPLICATION THE 1.5 VALVE DIAMETER DELIVERS BETTER VELOCITY AND FLOW WITH THOSE CORRECTLY SIZED PORTS DESIGNED BY “HENRY FORD”… THIS DISCOVERY HOLDS TRUE FOR BOTH INTAKE AND EXHAUST PORTS. WHEN YOU CAN EQUAL THE FLOW OF THE SMALLER PORT WITH A SMALLER VALVE YOU HAVE A MUCH MORE EFFICIENT PORT WHICH WILL PRODUCE MORE HORSEPOWER AND USE LESS FUEL… TODAY, FLATHEAD JACK OF “JAX VINTAGE VALVE COMPONENTS WITH OVER 50 YEARS OF FLATHEAD EXPERIENCE AND A HAND FULL OF 180 M.P.H. TIMING SLIPS ON HIS SHOP WALL, SEZ… WITH THE HIGH QUALITY AND SPIRIT OF OUR NEW AMERICAN MADE SUPER-LIGHT, SUPER -TRICK, NITRATED FLATHEAD VALVE SYSTEMS VIGILANTLY COMBINED WITH A PROPER LUBRICATED CAMSHAFT.
"YOU WILL BE"

"MAKING POWER BY REDUCING THE MASS OF YOUR VALVE TRAIN"