[Steve C.]

I'm always curious why the Pontiac community often calls for or can be stuck on low valve spring pressure. Even to the point some get their panties in a wad over it, like the opposite is evil We even see this with aggressive XE lobes.

My old Crower catalog says the popular 68404 spring is rated 113 lbs at 1.600" IH. So what happens with a bit more, like many of the aftermarket cam companies often suggest. While touting adequate pressure these companies will always make a point and call for more not less pressure to control the valves.

Ok, the main disadvantage with higher spring pressures is that stiffer springs don’t last as long as springs with less spring tension.... but are we really looking for a 100,000+ miles of driving on most of these scenarios.


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