I'm starting to make a few small changes with my rear suspension on the Tacoma and could use some help. My plans include relocating my rear shocks, a ubolt flip and some bumpstops.
the bumpstops are what brings me to my question. The reason for bumpstops is to keep the springs from flexing into negative arch and to keep the tires out of the body. I remember talking to Kurt at Cruiser Outfitters (who knows as much about the OME products as anyone) about the time I got my suspension from him about how the Dakars are designed to not have much arch to them even when new. Something about the best ride when the springs are closer to flat. So a few details about my setup. I'm using standard Dakars with the extra leaf and 1.5" over stock shackles from AllPro.
As I consider how to handle my bumpstops if I make them in a way to keep the springs from going into negative arch, I'm basically going to have zero uptravel. Take a look at this photo from today. This is basically a fully empty truck. But it is carrying the weight of my shell, along with the rear bumper with swingout/spare/can carrier (cans are empty). All told I'm guessing there is about 275lbs on the rear of the truck.
As you can see the springs are already essentially flat. If I load the truck for a typical trail/camping trip it compresses to negative arch. I don't feel like I need more lift as the truck sits at a good ride height, but I'm concerned about how much I'm fatiguing the springs by having them go into negative arch too often. I want to set up the bumpstops correctly but I don't want to kill all my travel.
As it sits currently I don't think the bumpstops are adequate. Here's the same spring at full stuff. Probably not the best to do this all the time. (note: the wide angle lens is probably making this appear a little worse than it really is, but you get the idea).
same spot to give you an idea of how the tire is stuffing into the wheel well. Seems reasonable to me but I'm not sure about what it's doing to the spring.
So, i'm looking for some help and suggestions. I really like the Dakars and have been very happy with the performance, but should I be looking at a different spring for how my truck is set up? I don't want this to turn into a thread of people just posting a bunch of different springs. I'm looking for some actual technical help.