2022 PC January Skinny

THE DRAGSPECIALTIES 7 JANUARY 2022 dragspecialties.com 538 REAPER ® CAM FOR M-EIGHT* • 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 this cam with Race Series oiling system • High lift valve springs are required on stock cylinder heads; see Feuling Beehive valve spring kit PART #0926-2973 or PART #0926-2974 of the 2021 Drag Specialties FatBook • SE cylinder heads have high lift valve springs, but will need to be verified • Heavy-duty one piece pushrods are also highly recommended; see PART #0928-0091 in the 2021 Drag Specialties FatBook • 2250 - 6250 rpm range • Made in the U.S.A. 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 PART #2401-0994 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. PART # DESCRIPTION 0925-1372 For 17-21 M-Eight GRIND VALVE LIFT OPEN CLOSE DURATION @ .053” LIFT @ TDC LOBE CENTERLINE CAM SPECS MEASURED IN THE ENGINE ON THE LIFTER @ .050” USING A 1.61 ROCKER ARM RATIO Intake .538 20.5° 38.5° 239° .180” 99° Exhaust .542 48° 18° 246° .157” 105° 574 REAPER ® EVO CAM* • Requires performance valve springs; see PART #s 0926-1467 or 0926-0851 of the 2020-2021 Drag Specialties OldBook • Performance lifters recommended but not required • Will work with factory pushrods on engines with factory stack up, if deck height, cylinders or rocker boxes have been modified from stock then adjustable pushrods are required; see PART #s 0928-0025, 0928-0012 or 0928-0013 of the 2020-2021 Drag Specialties OldBook • Increased compression, cylinder head work and performance exhaust recommended but not required • Increased compression is required for bottom end performance • 2700 - 6200 rpm range • Made in the U.S.A. PART # DESCRIPTION 0925-1373 For 84-99 Evolution Big Twin GRIND VALVE LIFT OPEN CLOSE DURATION @ .053” LIFT @ TDC LOBE CENTERLINE 574 Intake 574 15° 45° 240° .163” 105° Exhaust 574 61° 14° 255° .143” 113.5° WHITE DIAMOND ® EV8 STAINLESS STEEL VALVES • CNC-machined valve is made from one-piece forging of EV8 stainless steel • 360° anode is used to produce the highest grade hard chrome finish • Excellent flow characteristics • Sold each • Made in the U.S.A. FOR 17-21 M-EIGHT PART # HEAD DIA. STEM DIA. TULIP LENGTH NOTES INTAKE 0926-3343 1.614” .2347” 15° 4.035” Oversize 1mm 0926-3344 1.654” .2347” 15° 4.035” Oversize 2mm EXHAUST 0926-3345 1.299” .2342” 20° 4.055” Oversize 1mm 0926-3346 1.339” .2342” 20° 4.055” Oversize 2mm