What seat pressure?
Spring 'Installed Height' does effects seat pressure.
918 springs are recommended to be installed at the stock GM spec of 1.80" 'Installed Height'.
The 918s when installed at 1.80" will yield a 130 LB seat pressure.
Ron,
Here is the link to the 918 springs >
http://www.compcams.com/information/...6915_26918.pdf
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<small>[ November 22, 2002, 12:28 AM: Message edited by: Kimchee and Rice ]</small>

