Page 219 of 2008 Performance Parts by Ford Racing Performance Parts

roller rocker arms continued from page 216 lightweight aluminum roller rocker arms however provide many advantages for continuous high rpm operation they re mounted on needle bearings and feature a cylindrical roller that rolls over the valve tip to move it downward this reduces friction heat and wear and only requires about half the horsepower to operate the valve train and valve train stability is greatly increased roller rockers reduce valve stem wear and valve guide wear to an absolute minimum because the roller doesn t push the valve from side to side as it is opened as occurs with standard rocker arms as they slide over the valve tip ford racing offers roller rocker arms in several ratios for the ford racing v-6 small block v-8s and big block 429/460 v-8s positive-type oil seals positive-type oil seals are recommended on ohv performance engines to prevent oil from running down the valve past the valve guide and into the combustion chamber and contaminating the air-fuel mixture the cylinder head must be machined as illustrated to accept the oil seal camshaft timing degree wheel no camshaft installation is complete without checking camshaft timing events use a timing degree wheel to check for correct camshaft installation for modular engines use camshaft timing kit m-6266-d46 ford racing roller tappet camshafts ford racing offers roller tappet camshafts for the following engines valve push rods hardened push rods are required on valve trains that use a guide plate because they rub against the plate do not use non-hardened push rods push rod length is important to maintain correct valve train geometry the process of drilling an oil hole down the center removes some material from the spherical ball at each end push rods are described by gauge length the distance between the ends before drilling the oil hole the actual measured length is usually about 0.025 shorter than the gauge length camshaft and lifter prelube m-19579-a12 · highest-quality cam lube for camshaft replacement and engine assembly · recommended for use with all ford racing flat tappet camshafts · distributed in cases of 12 · single bottles may be available from your ford racing distributor part number cm-19579-a1 · use engine oil on roller cam shafts 5.0l 302 ho m-6250-b303 m-6250-e303 m-6250-f303 m-6250-x303 m-6250-z303 roller camshaft only roller camshaft only roller camshaft only roller camshaft only roller camshaft only valve spring retainers and keepers currently ford racing only offers retainers and single-lock groove keepers in a 7-degree design they are compatible with all ford racing valve springs for the ford racing v-6 small block v-8s and big block 429/460 v-8s 10-degree retainers/keepers are available from aftermarket suppliers do not attempt to interchange 7-degree retainers with 10-degree keepers and vice versa single-lock groove keepers are recommended for high-performance engines production 351c except boss and ho 351m and 400 engines use multi-groove keepers to promote valve rotation if you modify for any extended highrevving performance replace the valves retainers and keepers with a single-lock groove design ford racing performance parts used frpp m-6007-z347 crate engine dan pina s 1987 drift mustang www.fordracingparts.com 217

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