Aggressive pulling power with a “nasty” sound, the Reaper 521 grind will shine in 114” and larger cubic inch engines with added compression ratio
Ported cylinder heads are not required, but will complement the cam and add even more pulling power throughout the range
Stock throttle body produces an excellent powerband; use of a high-flow throttle body may increase peak power numbers
Kit includes Race Series oiling system: billet 7075 oil pump, Race Series lifters and High Flow billet aluminum camplate
Oil pump is 50% harder and stronger than the factory pump, holds tighter tolerances under temperature
Race Series hydraulic lifters have a full .200”
of total travel designed with slower bleed-down rate to handle heavy valve spring pressures, increase engine rpm before vavle float and feature increased roller clearance for steep-ramped camshafts and clearance for the M-Eight front exhaust camshaft lobe flange
Quieter and smoother engine operation
Increase oil pressure, scavenge volume and engine oil flow
15-25 degree cooler engine temperatures
15-30 degree cooler oil temperatures
10-30 more PSI of oil pressure
Eliminate wet sumping, blow by and oily air cleaners
Heavy duty .165” wall one-piece pushrods reduce valvetrain harmonics and increase valve lift
High-flow air cleaner and triple-stepped exhaust pipe highly recommended
High-lift high-load valve springs are required
RPM range 2850-6250
Oil-cooled oil pumps provide 27% more pressure and scavenge gear volume
Twin-cooled oil pumps provide 30% more pressure gear volume and 53% more scavenge gear volume
Specs:
Type: Chain
Model: Race Series®
Grind: 521 Series
Intake Open: 17°
Intake Close: 34°
Intake Lift: 0.518"
Intake Duration: 231°
Exhaust Lift: 0.521"
Exhaust Duration: 243°
Exhaust Open: 51.5°
Exhaust Close: 11.5°
