Product Details
Hydraulic Roller Lifters by Ford Performance®. Circle track racers who use the production hydraulic roller lifter in 347 crate engines reported that their engine seemed to lose power during long green flag runs. Dyno testing by Ford Performance engineers confirmed that – and showed a dramatic performance fall off over 6000rpm with hot oil temperatures. The problem was traced to the piddle valve check ball, which would become unseated at high rpm when the oil got hot. The fix was a lighter-weight ceramic piddle valve check ball combined with a higher-rate piddle valve spring to keep it seated. The results of these two small changes were impressive – and noticeable by the racers.
Features
- High-performance hydraulic roller tappet recommended for performance and racing applications
- Modified OEM lifter features ceramic check ball and higher rate piddle valve spring to improve performance at higher RPMs and higher oil temperatures
- Ford Performance dyno tests have shown 300 to 400 rpm increase in rpm range over stock OEM-type hydraulic roller lifter
- Direct replacement for the OEM small block hydraulic roller lifter applications
The heart of Ford Performance® Parts began over 100 years ago on simple dirt tracks; today it has transformed into a legendary name throughout the performance world. Ford Performance Parts provides: crate engines, air and fuel components, chassis and suspension equipment, valvetrain components, and interior/exterior dress-up accessories for superior styling. These racing parts are built from quality materials and most are track-tested on NASCAR series, World Rally, and NHRA vehicles to guarantee the ultimate in Ford Performance.