Re: math class needed on valve springs
The Pac 1220X spring shows 160 lbs seat press.at 1.900 and 400 lbs open at 1.250 which is close to coil bind.If you subtract your lift of .450 from the 1.900 your at 1.450 open.That may give you only 360lbs press.You need to find a "short" spring with your low lift that will give you the open pressure your looking for.Even if you do find a long spring that gives you the numbers, but is .300+ from coil bind your going to have valve stability issues. Have you looked into Comp cams ?. gsa612
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