Barry R Barry the guys that won last year where running beehives. You are a pro builder, why I can't I convince you to try these things???
I have been running them for 3 years with 2 different motors and camshafts. I do limit the rpm to 6,200 but they will go to 6,500 if I want to change the clip. I don't like revving a stroker to these limits because of the weight on the rotating assembly. Comp cams is coming out with new beehives soon with higher seat pressures. I don't understand the issues with pumped up lifters if you run a real small lash setup. I run .015" with my motor. This number is almost 0 when the motor is hot. (all Aluminium Shelby) This covers the expandsion rate. The valve are not stuck open from lifter pump up. The Ersons are working great. They are very heavy. I am looking at a couple of other rockers for the 498 motor. I already have T&D for the other motor. LS2 motors are going to 7,400 rpm with hydro lifters. The guys I know are not bottoming out the lifters. Your guys must be either limiting
oil flow and pressure to the lifters or enlarging the lifter bled hole. The beehives become uncontrolled at 7,600 rpm. 7,400 is the safe number now. When I get back to work I am going to send you a set of beehives to try on one of your EMC motors. You can tell me how it turns out. An avergae of 44 grams of weight saved per valve has to be worth something and the extra 400-600 rpm to the same motor. I know they are not cheap with the springs, retainers, cups, and locks. I run the #26120 on the motor now with a max of .600" lift on the cam. I am looking at the 25595 for the other motor with a .750" max lift. The seat pressure is less. Running a 11/32 valve or a 5/16" valve stem would also help with the weight savings. I may send my heads back out and have 5/16" valves installed instead of the 11/32" and save some more weight. How's the baby, getting big?? have agood evening Rick L.