Quote:
Originally Posted by gmonde
what is the math formula for a known spring rate to calculate seat and open pressure ?
spring rate is 370lbs @ 1.00"
closed valve spring installed heigh1.780
open valve spring height 2.237
seat pressure ?
open pressure ?
thanks in advance
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If you meant to say
"open valve spring height 1.237" then the difference is .543"
370 rate x .543" lift = 200.91 lbs more than whatever
you set/start with the installed height at.
You have to have a baseline height/pressure to calculate from, which the spring chart or actual test pressure will provide. That height is a variable based on valve stem length, +/std./- locks & retainers, spring seat machine work, depth of valve job seats.