Vortec L31 cylinder head
(→Flow rate of L31 Vortec heads: add, format table) |
(→Valve springs and retainers) |
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Another difference between Vortec valves and the earlier non self aligning head valves is the tip length. Earlier valves are 0.250" on both intake and exhaust valves. Self aligning head intake valves have a 0.260" groove-to-tip length, exhaust valves use a 0.289" groove-to-tip length. | Another difference between Vortec valves and the earlier non self aligning head valves is the tip length. Earlier valves are 0.250" on both intake and exhaust valves. Self aligning head intake valves have a 0.260" groove-to-tip length, exhaust valves use a 0.289" groove-to-tip length. | ||
| − | ==Valve springs | + | ==Valve springs, retainers and locks== |
[[File:Vortec beehive.jpg|thumb|left|300px|Straight wound spring, Left; Beehive spring, right]] | [[File:Vortec beehive.jpg|thumb|left|300px|Straight wound spring, Left; Beehive spring, right]] | ||
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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/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] | *[http://www.thirdgen.org/techboard/tech-general-engine/562935-rework-vortec-heads.html Vortec valvetrain mods] | ||
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| + | ===Locks=== | ||
| + | If self aligning rockers are used they can sometimes come into contact with the locks. Using a lock like the Edelbrock p/n 9615 can help. This 7 degree lock is 0.050" lower than a regular lock. | ||
===Spring seat=== | ===Spring seat=== | ||
| − | Use reduced hex head bolts or 12 point fasteners to give more clearance if a larger seat like for a 1.44" OD spring is used. Use caution if making the seat larger, there have been a few warnings about cracks developing on heads with enlarged seats. | + | Use reduced hex head bolts or 12 point fasteners to give more clearance if a larger seat like for a 1.44" OD spring is used. Use caution if making the seat larger, there have been a few warnings about cracks developing on heads with enlarged seats. |
==Valve guide boss== | ==Valve guide boss== | ||
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