part of article from Superchevy.com
All of that flow capacity would be sitting idle if the cam and valvetrain were not designed to take advantage of it. To that end, the valve lift has been increased from 0.525-inch to a lofty 0.591-inch, again breaking new ground for a production powerplant. Providing the valve action for that lift is a camshaft measuring 211 degrees of duration on the intake, and 230 on the exhaust. The camshaft is aided in achieving valve lift by rockers with a ratio of 1.8:1; up from the 1.7:1 ratio of GM's other current small-blocks. The relatively short duration and dramatically high lift help the LS7 achieve very high power levels while timing valve events for an acceptable level of refinement and emissions.
here is the link:
http://www.superchevy-web.com/technical/engines_drivetrain/completebuilds_testing/0504sc_ls7/
kingpin
All of that flow capacity would be sitting idle if the cam and valvetrain were not designed to take advantage of it. To that end, the valve lift has been increased from 0.525-inch to a lofty 0.591-inch, again breaking new ground for a production powerplant. Providing the valve action for that lift is a camshaft measuring 211 degrees of duration on the intake, and 230 on the exhaust. The camshaft is aided in achieving valve lift by rockers with a ratio of 1.8:1; up from the 1.7:1 ratio of GM's other current small-blocks. The relatively short duration and dramatically high lift help the LS7 achieve very high power levels while timing valve events for an acceptable level of refinement and emissions.
here is the link:
http://www.superchevy-web.com/technical/engines_drivetrain/completebuilds_testing/0504sc_ls7/
kingpin
