If you aspire to produce the best solid flat tappets in the industry than look no further than trend performance products line of premium and elite style cup lifters.
Schubeck ceramic lifters.
Schubeck is and or was a respected name in racing.
Have curved face and have to cut slots into block to make these work.
I discovered this by finding 5 worn lobes on my cam.
The ceramic lifter did not seem to be reliable.
Schubeck paid for the damages r r engine disassemble replace rings bearings and provided me with a set utilizing the puck.
I have the typical high rpm bbc setup ti retainers and keepers 300 900 spring pressures and approx 800 lift cam.
Good for class racing where roller cams are not allowed or high rpm needed.
Furthermore they can be swapped on to other cams with no problems.
If you have a high performance engine operating at levels above 7 000 rpm you will need the industries best solid flat tappet on the market.
Qanda for everything mechanical.
I have read that they are mainly ceramic and need no breakin.
I have a set of schubeck solid roller lifters roller x in my engine and they have apparrently been skidding instead of rolling.
These lifters are manufactured from m2 tool steel and come with an optional dlc coating.
Now most seem to be using the coated tool steel lifters in stock.
Schubeck ceramic lifters sbc solid 842 rounded end.
Also they make very light solid or hydraulic flat tappets.
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It seems that they make a composite radius lifter to replace solid rollers.