Lunati Hydraulic FT Cam users..........

I would only buy the microtrols myself, we have set of usa made flat tappet hydraulic lifters in my buddys pontiac and it wont spin past 5k. We finally figured out its the dam lifters, they don't collapse but instead bleed down as rpm increases to the point they act like a flat cam and the engine breaks up. The cam is a lunati voodoo (241/249 @ .050) so its a bit aggressive but the lifters were bought from a reputable source and brand but they are crap, bleed down like crazy. The other thing is you can make the flats on the lifters yourself with a litle fabbing/creativity for extra oiling like the crowers.