“Oil is the lifeblood of your engine,” says Feuling Parts CEO Luke Leatherman, and to cater to the very specific needs of Harley’s M-8 engine design, he has developed a choice of purpose-designed oiling system packs.
The company’s HP+ and Race Series kits both include Feuling’s high flow billet camplate made from 7075 aluminum, which is 50% harder and stronger than the factory or Feuling OE+ camplates.
Feuling increases oil flow and volume by enlarging the oil pump reservoirs and critical oil passages, including matching the oil port holes throughout the camplate to the port holes in the engine case to increase engine oil flow to the lifters, piston cooling jets, crankshaft and rod bearings.
The Feuling oil pumps are bench-tested, with the relief valve seated and sealed to a minimum of 30 psi with full pop-off at 55-60 psi. Leatherman says that “the increased oil volume from the larger gears and properly sized passages, along with the pressure relief valve seat and seal from these oil pumps, is essential for proper oiling system function. Our oil pump and camplate combination eliminates the common pressure and scavenge issues associated with the factory oiling systems.”
Feuling says the combo will deliver quieter and smoother engine operation, increased oil pressure (10-30 more psi); 42% more scavenge volume with port sizing, matched passages and holes to the engine case; 68% more oil volume to the crankshaft and connecting rod bearing; 15-25 degree cooler engine temperatures; 15-30 degree cooler oil temperatures; and reduced wet sumping (as much as 50% reduction of engine sump oil level), blow by and oily air cleaners with test results showing a 2 HP and 2 ft/lbs of torque gain to the rear wheel on M-8 models.
The water cooled engine oil specs show 30% more pressure gear volume over stock and 53% more scavenge gear volume over; the oil cooled engine oil pump specs show -27% more pressure gear volume and scavenge gear volume over stock. A washer-free optional X ARP bolt kit is available for the high flow camplate and the HP+ or RS oil pump combo. Both kits fit chain or (with block-off plate) gear drive cam and the clearance on front exhaust lifter to camshaft flange fit must be checked.
The HP+ Series kits include billet 6061 aluminum high volume oil pump, the high flow camplate, HP+ hydraulic roller lifters and cam installation kit, cam bearing, cam/crank bolts and washers, engine and fastener assembly lube.
The RS (Race Series) kits include the RS oil pump and lifters, the high flow camplate and cam installation kit, cam bearing, cam/crank bolts and washers, engine and fastener assembly lube.
The increased strength of the 7075 aluminum construction is said to hold tighter tolerances under temperature. The RS oil pump features increased scavenge side kidney port volume over the HP+ oil pumps. RS hydraulic lifters have a full .200" of total travel designed with a slower bleed down rate to handle heavy valve spring pressures, increase engine rpm before valve float and feature increased roller clearance for steep ramped camshafts.
FEULING PARTS
www.feulingparts.com