Feuling Reaper Chain Drive Camshaft for Harley Milwaukee Eight

Feuling Reaper Chain Drive Camshaft for Harley Davidson Milwaukee Eight

High performance camshafts by Feuling for Milwaukee Eight engines. Available in different configurations to suit your performance needs.

Complete camshaft kit with Race Series lifters available here
Complete camshaft kit with HP+ lifters available here

Features:

• Produces more power and torque in the riding rpm range, improving throttle response, acceleration and fuel mileage
• Smooth camshaft lobe ramps are easier on valvetrain components and eliminate excessive valvetrain noise and wear
• Dyno proven and track tested
• See cam specific features below

405 Camshaft

• Produces a wide powerband that increases torque and horsepower throughout the entire rpm range
• Direct bolt-in replacement for M-Eight engines; can be used with stock valve springs, pushrods, lifters and exhaust
• Will respond well when used with slip-on mufflers or full exhaust system and a high-flow air cleaner
• Feuling recommends mufflers with smaller cores for the best low-rpm power
• 1700 - 5700 rpm range
• 405 Grind Camshaft Installation Instructions For Milwaukee Eight Engines

465 Camshaft

• Produces solid bottom-end performance and substantial gains above 2800 rpm compared to the stock cams
• Direct bolt-in replacement for M-Eight engines; can be used with stock valve springs, pushrods, lifters and exhaust
• Will respond well when used with slip-on mufflers or a full exhaust system and a high-flow air cleaner
• Use of performance valve springs is not required but may result in a quieter, smoother-running valve train
• Responds well when combined with increased engine bore and/or engine compression
• 1850 - 5950 rpm range
• 465 Grind Camshaft Installation Instructions For Milwaukee Eight Engines

472 Camshaft

• Great all-around camshaft and Feulings go to for 4-1/2 stroke 114” - 117” engines looking for a little more than the 465 grind and wanting a bolt-in
• Has a great bottom end with substantial gains above 2800 rpm when compared to stock
• Use of performance valve springs is not required but may result in a quieter, smoother-running valve train, see B962-09262973 or B962-09262974
• Responds very well to increased bore and or compression, exhaust system and air cleaner
• 472 Grind Camshaft Installation Instructions For Milwaukee Eight Engines

508 Camshaft

• 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
• A high-flow exhaust system and air cleaner is highly recommended for optimal performance
• Feuling recommends matching 508 cam with Race Series oiling system B962-09320199
• Requires high lift valve springs; see B962-09262973 or B962-09262974
• Heavy-duty pushrods are highly recommended; see B962-09280091
• 2250 - 5900 rpm range

521 Camshaft

• 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
• A high-flow exhaust system and air cleaner is highly recommended for optimal performance
• Feuling recommends matching 521 cam with Race Series oiling system B962-09320199
• Requires high lift valve springs, see B962-09262973 or B962-09262974
• Heavy-duty pushrods are highly recommended, see B962-09280091
• 2250 - 6250 rpm range

538 Camshaft

• Aggressive camshaft with a nasty sound
• Revs up fast and pulls hard in engines with big bore cylinders, modified cylinder heads, intake, compression and exhaust
• The Reaper 538 grind will shine in 124” 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 538 cam with Race Series oiling system B962-09320199
• High lift valve springs are required on stock cylinder heads, see Feuling Beehive valve spring kit B962-09262973 or B962-09262974
• Heavy-duty pushrods are highly recommended, see B962-09280091
• 2250 - 6250 rpm range

592 Camshaft

• Get serious with bore size, ported cylinder heads and throttle body
• Aggressive camshaft requiring high lift and higher load valve springs, performance pushrods and lifters
• High-flow air cleaner and triple-stepped exhaust pipe highly recommended
• Feuling also recommends matching this cam with Race Series oiling system B962-09320199 or B962-09320218
• Heavy-duty pushrods are highly recommended see B962-09280091
• High lift valve springs, performance pushrods and lifters required
• 2850 - 6250 rpm range

General product notes:

Note: Screamin’ Eagle cylinder heads have high-lift valve springs and do accept the 521 grind cam.

Note: Due to the unstable nature of this 4-valve engine design with one rocker arm activating two valve springs, Feuling highly recommends running one-piece pushrods over quick-install adjustable pushrods to maintain maximum cam/valve lift and reduce valvetrain harmonics and associated hydraulic lifter issues.

Note: Feuling fastener kit B962-24010994 also highly recommended to help prevent cylinder head cracking, kit replaces the rocker shaft bolts with studs and nuts to help reduce the stress of the rocker shaft standoffs.

Camchest Installation Instructions For Milwaukee Eight Engines Available Here

Cam specs measured in the engine on the lifter @ 0,050” using a 1.61 rocker arm ratio

GRIND	VALVE LIFT	OPEN	CLOSE	DURATION @ 0,053”	LIFT @ TDC	LOBE CENTERLINE
405
Intake	0,395	4°	24°	200°	0,068”	103°
Exhaust	0,405	36°	11°	205°	0,049”	108°
465
Intake	0,445	4°	23°	207°	0,100”	99,5°
Exhaust	0,465	50°	6°	236°	0,100”	112°
472
Intake	0,468	8°	25°	213°	0,117”	98,5°
Exhaust	0,472	50,7°	7,75°	238°	0,110”	111,5°
508
Intake	0,508	20,5°	37°	237°	0,180”	98,5°
Exhaust	0,511	44°	17,5°	241,5°	0,146”	103,25°
521
Intake	0,518	17°	34°	231°	0,162”	98,5°
Exhaust	0,521	51,5°	11,5°	243°	0,125”	110°
538
Intake	0,538”	20,5°	38,5°	239°	0,180”	99°
Exhaust	0,542”	48°	18°	246°	0,157”	105°
592
Intake	0,578”	20°	34°	234°	0,182”	97°
Exhaust	0,592”	68°	16°	264°	0,146”	116°