6.0 FORD POWERSTROKE 18mm ORINGED 2 NEW HEADS

Description

6.0 POWER STROKE O/RINGED NEW HEADS.
INGRAM MACHINE HAS BEEN A PERFORMANCE MACHINE SHOP SINCE 1964
WE CHECK THE NEW HEADS FOR ANY FLAW
PRESSURE TEST , MAGNAFLUX, VALVE SEAL AND SPRING SEAT PRESSURE
WE VACCUM CHECK THE VALVE FROM THE PORT SIDE. WE HAVE NEGATIVE FEED BACK FROM A BUYER THINKING HIS INTAKE VALVES WHERE LEAKING. HE WAS PUSHING 120 PSI INTO THE INTAKE PORT CAUSING THE INTAKE VALVE TO OPEN ENOUGH TO SHOW LEAKAGE. INTAKE BEING BIGGER THAN THE EXHAUST UTILIZED THE PRESSURE AND SHOWED LEAKAGE. EXHAUST DID NOT SHOW LEAKAGE BEING SMALLER IN DIAMETER. WE RECOMMEND THE STAGE 2 SPRING WHEN RUNNING HIGH BOOST AND STAGE 2 CAMSHAFTS
INTAKE VALVE HAS 1.397 SQ INCHES. RUNNING 60 LBS OF BOOST YOU NEED A 90 LB SEAT PRESSURE TO HOLD THE VALVE CLOSED.