I think PAC made that spring, if you can find someone who bought up their inventory.
Swift makes it in the barrel type.
Printable View
8” 100 12” 200 use the unloaded on the smasher to assemble it. 6” will coilbind
Even at 8", swift isn't supposed to be loaded to 600#. I assume the poster has something different than cookie-cutter in mind.
Easy equation for what spring is needed for your desired "extended load"
Spring rate = ((Ride height load) - (Desired extended load)) / (Extended center to center) - (Ride height Center to center)
Example: I want 100# of extended load, my ride height load is 600#. My Ride height center to center is 15", my extended center to center is 20"
(600# - 100#) / (20" - 15") = 100 lb/in spring
Is there a way to figure out using spring rubbers in Excel or is that something you absolutely need a spring smasher for?
Thank you good to know. I'm new to all the coil stuff racing a big block modified and we were on torsion bars for years. Been trying to use 4m as a way to catch up on things. Spring rubbers seem to be the main thing people are using on them currently.