Vortec L31 cylinder head

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 *[http://www.thirdgen.org/techboard/tech-general-engine/542295-ls6-valvetrain-vortec-heads.html LS6 Valvetrain on vortec heads]
 *[http://www.thirdgen.org/techboard/tech-general-engine/562935-rework-vortec-heads.html Vortec valvetrain mods]
+===Other springs===
+The following valve springs are single w/either no damper or damper removed. They fit the stock seat and retainer unless otherwise noted.
+*Comp p/n 981
+*Crane p/n 144845: Performance hydraulic roller cams, PAC enhanced wire, no damper
+**OD: 1.265"
+**ID: 0.865"
+**Seat pressure: 120 lbs @ 1.750"
+**Open pressure: 358 lbs @ 1.250"
+**Coil bind: 1.100"
+**Rate: 476 lbs/in.
+**Max net lift: 0.600"
+*Isky p/n 205D
+*Lunati p/n 73943
+*Manley p/n 22410, fit without machining, allow 0.520" lift
+**Seat pressure: 125 lbs
+*Open pressure: 340 lbs @ 0.500" lift
+** Retainer p/n 23652
+{{Note1}} K Motion K-700 springs have been reported by one member of Hotrodders,com to be breakage prone. Another member (this writer) has had several sets of 1.25" OD single springs with damper break the dampers on a 0.480" net lift hydraulic cam SBC application. Whether these problems were transient or ongoing remains to be seen. If these springs are being considered, research them first.
 ===Locks===

Revision as of 18:15, 14 January 2013