crower cams, ISKY and howard cams sell lifters with holes machined in the lifter face, http://www.competitionproducts.com/prod ... r=651080DL
http://www.competitionproducts.com/Comp ... /651080DL/
theres a small hole machined into the base of the lifter face that directs a constant stream of pressurized oil into the lobe/lifter contact area, thus theres never a lack of lubricant like could occur at low rpms with standard splash lubrication,(the main reason they tell you to break in cams at 2500rpm-3000rpm)
this works great on solid lifters but they can,t do that with hydraulics because the oil is used to float the push rod seat and take up lash, solids run lash clearance so they can use that method of extra lube
http://store.summitracing.com/partdetai ... toview=sku
comp cams sells a lifter bore grouve tool
These COMP Cams lifter bore grooving tools are designed to groove the lifter bore to ensure that pressure-fed oil is directly injected into the contact area between the lifter and the camshaft. Increased oiling will significantly decrease wear on the camshaft and lifters, and decreases the risk of premature failure during the break in process
Developed by one of the top NASCAR engine builders, this innovative tool precisely grooves the lifter bore to ensure the pressure fed oil is directly injected into the contact area between lifter and camshaft. This increased oiling significantly reduces wear on the camshaft and lifters and decreases the risk of premature failure during break-in. This machine operations to the block is quick, easy, inexpensive and is the best insurance for a new cam
that allows you to grouve the lower 1/2 of the lifter bore so the lifter oil passage sprays oil onto the cam under pressure
there ARE lifters in both hydraulic and solid lifter designs that have a very small flat ground on the lower outer 1/2 of the diam. that allows extra oil to spray as the lifter rotates in its bore, and an old hot rodder trick is to do the same thing with 600 grit sand paper laid on a sheet of glass and with a few passes you can do the same basic thing on standard lifters if your very careful
http://www.competitionproducts.com/Comp ... /651080DL/
theres a small hole machined into the base of the lifter face that directs a constant stream of pressurized oil into the lobe/lifter contact area, thus theres never a lack of lubricant like could occur at low rpms with standard splash lubrication,(the main reason they tell you to break in cams at 2500rpm-3000rpm)
this works great on solid lifters but they can,t do that with hydraulics because the oil is used to float the push rod seat and take up lash, solids run lash clearance so they can use that method of extra lube
http://store.summitracing.com/partdetai ... toview=sku
comp cams sells a lifter bore grouve tool
These COMP Cams lifter bore grooving tools are designed to groove the lifter bore to ensure that pressure-fed oil is directly injected into the contact area between the lifter and the camshaft. Increased oiling will significantly decrease wear on the camshaft and lifters, and decreases the risk of premature failure during the break in process
Developed by one of the top NASCAR engine builders, this innovative tool precisely grooves the lifter bore to ensure the pressure fed oil is directly injected into the contact area between lifter and camshaft. This increased oiling significantly reduces wear on the camshaft and lifters and decreases the risk of premature failure during break-in. This machine operations to the block is quick, easy, inexpensive and is the best insurance for a new cam
that allows you to grouve the lower 1/2 of the lifter bore so the lifter oil passage sprays oil onto the cam under pressure
there ARE lifters in both hydraulic and solid lifter designs that have a very small flat ground on the lower outer 1/2 of the diam. that allows extra oil to spray as the lifter rotates in its bore, and an old hot rodder trick is to do the same thing with 600 grit sand paper laid on a sheet of glass and with a few passes you can do the same basic thing on standard lifters if your very careful