521 CAM - 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. The stock throttle body produces an excellent powerband and use of a high flow throttle body will increase peak power numbers. A high flow exhaust system and air cleaner is highly recommended for optimal performance. FEULING recommends matching this cam with our RACE SERIES oiling system.
NOTE: High Lift valve springs are required on stock cylinder heads, see FEULING BEEHIVE valve spring kit #1107 (DRAG# 0926-2973) or #1108 (DRAG# 0926-2974). SE cylinder heads have high lift valvesprings and will accept the 508 and 521 grind cam. Heavy Duty one piece pushrods are also highly recommended see #4087.
Part # 1346 RPM range 2,250 - 6,250. Grind: 521
Valve Lift Open Close Duration @ 50 lift @ TDC Lobe Centerline
Intake .518 17 BTDC 34 ABDC 231 .162 98.5
Exhaust .521 51.5 BBDC 11.5 ATDC 243 .125 110
Overlap: 28.5
*Cam specs measured in the engine on the lifter @ 0.050 using a 1.61 rocker arm ratio
DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VECHICLE
Feuling does not recommend tuning beyond stock emissions standards.
FITS:
Milwaukee Eight 17 - 24 Except VVT, 521 grind chain drive cam, 518 Intake lift, 521 Exhaust lift, high lift valve springs required, performance pushrods and lifters recommended. RPM 2,250-6,250
COUNTRY OF ORIGIN:
USA
Disclaimer: This is a RACE ONLY part Parts designated as Race Only are for use only on vehicles used for competition racing and are not for use on vehicles registered for use on public roads. Sale and/or installation of Race Only parts in any way inconsistent with this warning is prohibited and may result in enforcement by the U.S EPA under the federal Clean Air Act. RACE ONLY PARTS ARE NOT LEGAL FOR SALE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES. NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY EPA POLLUTION CONTROLLED MOTOR VEHICLE.
