The Grim Reaper Aggressive pulling power with a nasty sound. This camshaft revs up faster than the 521 grind, sounds nastier and pulls harder but is more difficult to tune. The REAPER 508 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. The stock throttle body produces an excellent powerband and use of a high flow throttle body will increase peak power numbers.
* This aggressive camshaft requires high lift and higher load valve springs, performance pushrods and lifters.
* High flow air cleaner and stepped exhaust pipes highly recommended.
* FEULING also recommends matching this cam with our RACE SERIES oiling system #FE-7097 or FE-7099.
* High lift High Load valve springs are required, Part # SS900-0958
* Heavy duty pushrods are highly recommended.
* RPM range 2,250 – 6,250. Grin d: 508
* Valve Lift Open Close Duration @ 50 Lobe Centerline
* Intake .508 20.5 BTDC 37 ABDC 237 .180 98.5
* Exhaust .511 44 BBDC 17.5 ATDC 241.5 .146 103.25
* Overlap: 38
* Good cam for a SE Stage 3 Kit.
