The tender springs discussion has brought me to another question about tender springs... Is there a way to implement / use them on a non-coilover setup? And would there be a significant benefit to keeping the springs from un-seating at full droop? The front springs on my Jeep un-seat by an inch or so at full droop and the rears by about 1.5 inches. They don't un-seat beyond the coil retainer posts, so there's no concerns about making sure they re-seat correctly or anything.
The only reason to keep the springs from un-seating with helper springs is to ensure that they re-seat correctly.
In reply to GameboyRMH :
Unless you're jumping it and want the compression damping to help your landing more, maybe possibly.
Interestingly, I just found this on a forum. It's a spring with the top ground flat and a tender spring just stacked on top of it. 
¯\_(ツ)_/¯ said:In reply to GameboyRMH :
Unless you're jumping it and want the compression damping to help your landing more, maybe possibly.
Well in that case you'd want tender springs, which are a different thing: they have an amount of stiffness that could be relevant to affecting a car's handling. Helper springs are just hard enough to keep the springs they're holding in from flopping about. At that point (of using tender springs to extend a shock when airborne) you're not just keeping the springs from unseating, you're technically running a dual-rate spring setup.
rslifkin said:Interestingly, I just found this on a forum. It's a spring with the top ground flat and a tender spring just stacked on top of it.
Springs intended for use with coilovers come with the ends ground flat. It looks like there's some kind of spacer between them (the black ring) - if there wasn't, then the tender spring could unseat from the main spring as well.
From what I found, they ended up using a 2" coilover slider over the spring retainer post. At that level of effort, cost and screwing with it, I'm probably not far off from just buying custom progressive springs that'll act as if they've got built-in tenders to keep some load on everything when fully drooped.
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