That is what I just figured out
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I am going to use a taller ball cup on the shaft to do it. it doesn't matter if I over limit or have no internal limiters int he shock. The Collar is to the bottom of the threads and the spring will not reach far enough to make ride height. The car will always come to rest at 4mm.
Now with the new ball cup on the bottom of the shaft I can make rideheight
.. thank god for those RPM ball cups with 2 inches of threading area
it is a general rule about the 5mm rideheight. Every indoor track that I have been too has been 5mm. Even the snowbirds was 5mm