when those hydo lifters start pumping up (float) they hang the valves open same as solids when you go past the valve springs. I do know it don't take near as much valve spring with solids to turn 7000 rpms. Back in the Junior Stock Days after about 30 or 40 1/4 mile passes you would start loosing some ET due to the loss of MPH.. The car just wouldn't pull in high gear.I would pull the springs and they would be down around 10# on the seats. I would replace the springs and be back on my number. In those days if you wanted to compete in the Jr. Stock classes and pass the inspections you had to on the edge. All the legal guys were with in a tenth of each other... then you hsd the CHEATERS !!!

Jerry Davis II#4711



ol Smokey said "one test is worth a thousand expert opinions."