I think what you are seeing is more of a hydraulic lifet issue and valve weight. We have BeeHive springs on stuff turning 8500rpms in some cases. The hydraulic rollers in the FE engine do good to make it to 6000 rpms and this is the smooth lobes. I did one recnetly with 11/32 valves and BeeHive springs and it turned about 6600 rpms with no problem.
With a solid lifter application or one like the SOHC engine where there is no hydraulic lifter I think it would work great. There are some new springs out by PAC that are the latest deal. You do not have to run as much spring pressure with the BeeHives either with everything equal.
I am just wondering if there is a lot of valve train problems due to the long chain on these SOHC engines and caring a lot of harmonics from the crank to the valve train. This is one reason most high tech race engine use a belt drive set up. We use a belt drive set up on all of our high end drag race engines. It would be nice to get one made for these things. Just seems to be a lot of problems with these engines when you vary much from the stock cams and spring pressures. I hope to build one soon and find out some of this stuff. Seems pretty expensive for what might not be any more HP than we make now with the regular wedge FE engines. I guess we will see. Good luck to all.
