I have 700 lbs springs for my coilovers from Toytec. Work great for me with the bumper/winch combo.

It's not plushy and soft, but it handles great.

I am surprised every day by my 600# springs. Crap load of extra weight and it does just fine for me. E rated tires are stiff on this truck, so I couldn't even imagine 700#. I guess it's a personal taste thing. I also checked on ride height for my set up after a couple of years for the springs to settle in, and it's right there where it needs to be, but is definitely on the edge. I could go to 650s to raise it a little and not be too harsh, but I'm cool with 600s so far.

For future reference, I found this article helpful when I was initially researching for front spring options and rates:

Coilover Spring Rates for Toyota Tacoma & 4Runner | AccuTune Off-Road

Im currently on 700lb springs on an Icon CDCV setup and have about 230lb of extra weight hanging off the front axle. For 3" of lift I have only a few threads of preload. I just ordered a set of KING external ressie coilovers and shocks and paid Ben @ Filthy Motorsports to consult for a custom setup. He heavily recommended going down to a 650 spring with some preload vs 700 with very little preload. So im going to give that a shot

Exactly how I felt after I put my lowers on. On road manners were more fluid.

Could be in my head but I felt my setup has gotten smoother with this warmer weather compared to the Winter.
At .75" driver and .25" passenger that gave me about 2.5" of lift.
Recently tried 36psi a few weeks ago and that helped a ton.

I think if I send these over for a rebuild at some point I'd like to give 650lb coils a try.

Also, before I got the 700's I always thought I'd be limited in up travel due to them being so stiff.
I had my sway bar removed this trip and the springs didn't limit me at all.


I have the sway bar back on though. Driving back from Austin to Houston, didn't like the feel of no sway bar with crosswinds even with the 700's.

This is really interesting to me as well as all the varied feedback on how well different coils/struts work in different setups. The more I try different suspension setups on my rig and read about them here the more unclear the results of any suspension change seem to me. As well I start to understand why so many people have trouble getting the results they want as far as lift height and plushness of performance.

A question I have is how are you determining how different aspects of the additional load you have on your vehicle affects either the front, rear or whole vehicle suspension? For instance the front bumper and winch affect predominantly the front, and a rear bumper predominantly the rear. However, how do you consider a full set of skids, a full roof rack or sliders? Maybe I'm over thinking.
None the less, I have easily the same amount of weight (230 lb) affecting my front suspension as you. Originally when I added my bumper, winch and skids to my Toytec Ulitimate lift with a 650# coil I had to crank the pre load about 1.5" to get the height back to where it was. And consequently the ride went to crap. I lowered it slightly and it was improved but not great. Then later I got my current suspension setup. 700# coil with 2.5" Radflos with about 1" of threads showing below the pre load collar to run 2.5" lift. Now it runs very well and handles the extra weight quite well.
Again very interesting all the different results from seemingly similar situations

I was talking to Ben at Filthy motorsports about this (Spring rates and load). It was a long technical conversation but he basically preferred running the lowest spring rate as you could and tuning the shock for the weight. Will probably try this route with my new shocks.

How much preload you need to get 700# coil to 2.5- 3inch lift on kings

getting ready to move up to 700 lb springs.
i have ads shocks and i'm at max recommended settings on the collars.
currently have 650 lb springs and extra 1/4" spacer on drivers side

have proline 4x4 bumper - no winch
full aluminum skids under, demello sliders, prinsu rack, urd/whipple super charger and a group 34 battery. various light bars. 650 not enough for me.

I'm a bit skeptical as well since I felt moving from 650 -> 700 springs on my Icon CDCV setup was a big improvement. However, I need to trust the guy who works with off road suspensions everyday so thought I would give it a shot. I just got the tracking number for my shocks & coilovers so I'm hoping to install it Saturday and will report back.

For you all talking about this. With a Lo Pro Bumper from C4, including winch and light bar, 650 was perfect. However switching over to their Hybrid Bumper, along with a roof rack and skid setup, 700 was the way to go.

I feel just about all of you talking will want to go 700. Wouldn't hurt to bump up the nitrogen in your shocks either. Believe most come running 150 from manufacturer, I'm going to bump mine up to about 175 and see how that goes. Though King did recommend 200 with no 700lb coil.

I'm sure a legit shock building company could fine tune these for our specific builds, but I don't have the time to ship them off for a week or so as it's my daily driver.

I hear you but I think if you want to maximize off road performance with our not so ideal IFS setup getting deep into the details is worth the investment. I learned a lot from my conversation with Ben @Filthy and his softer spring argument made a lot of sense to me. Especially since I tend to prefer more slower moving technical trail riding.

For a point of reference this is where my 700lb Icon Coilovers are sitting with 230ish extra lbs hanging over my front axle. Alum winch bumper, winch, dual batteries, air compressor etc. it nets about 2.75” of lift over stock




Either way the proof is in the pudding. Look forward to field testing the softer setup over some rocks soon.


Sent from my iPhone using Tapatalk

Xtremluck,
Sorry to dig up an old thread but how did it work out? I'm trying to decide if I should bump up to the Icon 700's as well.

Todd

Sorry for the delayed response. 100% it was the right decision to go 650#. The ride quality offroad is immensely better vs 700# and static lift height at 2.5" per KING's recommendations was accomplished with minimal preload. Although one thing to think about is that KING shocks are very different than Icon when it comes to dampening. So that probably plays a pretty big role in ride quality as well

Thanks for the update. I have Icons so I’ll keep that in mind. I think I’ll ride it out with the 650 for a bit and see how it goes.