Excaliper My motor with the 482 kit will turn 6,500 rpm if I take out the limiter chip in the MSD. The motor doesn't fall on it's face with valve float either. I have been running these springs for 3 years. I went from a 501-533 hydro cam to a 587-607 hydro roller cam from crane. My motor pulls to 6,200 without any valve float or lifter pumpup. I set the lifter lash at .015". With high rpm the lifter doesn't hold the vale open. On LS2 motor they are turning 7,200-7,400 rpm with any float. At 7,600 rpm all hell breaks loose with lose of control of the valves. Gessford builds great motors. George and company like running solid lifter camshafts in there motors. This is a proven and durable motor if maintained correctly. Comp cams is coming out with stronger beehive springs. If someone ever makes a rev kit, the 8,000 rpm range will happen. IMO if you have not tryed beehive springs, don't knock them until you tryed them.
As far as your 2 motors running the 1/4 mile, running short pipes you have no back pressure and you loose HP in the upper rpm. The 2 motor is running with exhaust and the back pressure help the power bands. If you are looking for max power from your motor with exhaust sidepipes on you want to see about 1-3 psi of pressure at WOT. This will put you in the max power of both ranges, torque and HP. I am sure that George and Neil gave you a motor with 500+hp but I will bet you they got you another 40-60Ft of torque from less camshaft and matching the parts better.
Remember torque moves the car, HP keeps the speed up. As far as seeing how fast the car is, Find a 1/4 mile of road, 1,280 ft mark it off and run it one evening. It may not be perfect but close will do.
Watch out for the cops.
