seats for aluminum heads

Old 12-03-2007, 06:42 AM
  #1  
signsbyesa
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Location: san antonio, texas
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Default seats for aluminum heads

this is my first set of aluminum heads that i am putting together,
do the aluminum heads require cups for the springs so they don't
damage the heads? i am using a mechanical roller cam and springs
with a lift of .635 and 1.55 dia. spring w/damp seat pre: 135 @ 1.880
and open pre: 350 @ 1.250 coil bind @ 1.150 the heads were new
but out of a box and had no specs. thanx
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Old 12-03-2007, 09:42 AM
  #2  
performanceengin
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you deffinately need hardened spring cups or washers or the spring will cut into the head
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Old 12-03-2007, 09:57 AM
  #3  
signsbyesa
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thanx bud, ordering the valves and all components that i might
need to get these heads, i will ask if the valves should be longer
with the seat added :?
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