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-   -   **Rear Coil Spring Discussion - The Perfect 3rd Gen Rear Spring** (https://www.toyota-4runner.org/3rd-gen-t4rs/281374-**rear-coil-spring-discussion-perfect-3rd-gen-rear-spring**.html)

rickashay 01-03-2020 03:46 AM

**Rear Coil Spring Discussion - The Perfect 3rd Gen Rear Spring**
 
I’ve been meaning to start this thread for a while. @Taylor20 and I have been bouncing ideas and information back and forth about rear springs and I thought we should open it up to the community for disucssion. Let’s talk existing rear coil options and what an “ideal 3rd Gen rear spring” might look like? I realize everyone has different uses and setups, but I feel like there are just so many more options for the 120 Platform Toyota’s than for us 3rd Gen guys.

I for one, would love a LT rear spring capable of staying in the coil buckets at full droop, capable of supporting 200-250lbs of rear weight (over stock) and sitting at 2.5-3” of lift. My ideal spring may be different than yours, but that’s where we can start to collect some data and see if there are some common themes to approach a vendor about a custom spring potentially.

I’d love to hear from @Black798 as I know he’s running some 4th Gen Dobinsons or something back there.

CURRENT SPRING DATA (thanks for putting this together @Taylor20 )

OME 861's - 220lbs - 480/490mm FH
DOBINSON 210V - 160-239lbs - 475/485mm FH
DOBINSON 675V - 157-230lbs - 470mm FH
TOYTEC Superflex - 240lbs - 495mm FH
LC 7.5 Wrap - 160lbs - 473mm FH
LC 8 Wrap - 160lbs - 483mm FH

If you can confirm and/or fill in the missing info, please reply to the thread and I will update the main post.

Let’s talk rear springs!

Taylor20 01-03-2020 09:19 AM

Thanks Rick for starting this.
Just to throw some more info out there from my searching.

The Dobinson 675v is a LT 4th gen rear coil. It provides the 4th gen's 2.5" of lift on average in stock form. That would provide us with 3.5" of lift due to the OE 4th gen spring providing about 1" of lift to start with. With extra weight it would bring that down some.
The Dobinson 210v is the stock height extra weight LC front spring, and from what @Black798 has told me it offers about 3.5" of lift with the extra weight.

I did have 861's, rear swingout and drawer system, but almost 5" of lift, it was just too much for me. I will probably order the 675v and see what those provide in the next couple months.

Free height is key for a spring not falling out, it would have to be at least 480mm to not leave a worry of them doing so.

rickashay 01-04-2020 03:15 AM

Some more food for thought....

I had my 4th gen on 675V springs after switching from the metal Tech LT springs. They were slightly lower but on a stock truck (factory hitch and no rear bumper) I was closer to 3.5” of lift. I’ll dig in my old build thread and see if I ever posted huh to fender measurements to try and validate that...

Novashards 01-04-2020 08:35 AM

I used Bilstein 5100s paired with OME 880 in the front and 890 in the back, have a slight positive rake. I didn't measure before/after height though. The suspension levels out with a hitch rack loaded with ~300lbs. I didn't take before pictures but there are after pictures in my thread.

https://www.toyota-4runner.org/3rd-g...ml#post2965726

Dieselchessy 01-04-2020 12:26 PM

I have used LC ~150k.
One is 8 wraps, white, dark blue, double purple. Free standing it’s 483mm.
Other is just over 7.5 wraps, white, light blue, double purple. Free standing it’s 473mm.

Dieselchessy 01-04-2020 03:05 PM

Not sure what Superflex’s your referencing but this thread lists them at 240# spring rate. I haven’t found an alternative reference.

ToyTec SuperFlex Rear Spring INFO Thread

rickashay 01-04-2020 05:37 PM

Quote:

Originally Posted by Novashards (Post 3418604)
I used Bilstein 5100s paired with OME 880 in the front and 890 in the back, have a slight positive rake. I didn't measure before/after height though. The suspension levels out with a hitch rack loaded with ~300lbs. I didn't take before pictures but there are after pictures in my thread.

https://www.toyota-4runner.org/3rd-g...ml#post2965726

The OME 890's do provide the lift height that I am after but they do not have enough free height to allow maximum droop while maintaining their position in the coil buckets.

Quote:

Originally Posted by Dieselchessy (Post 3418683)
I have used LC ~150k.
One is 8 wraps, white, dark blue, double purple. Free standing it’s 483mm.
Other is just over 7.5 wraps, white, light blue, double purple. Free standing it’s 473mm.

Thanks for this... I will ad it to the main post.

Quote:

Originally Posted by Dieselchessy (Post 3418746)
Not sure what Superflex’s your referencing but this thread lists them at 240# spring rate. I haven’t found an alternative reference.

ToyTec SuperFlex Rear Spring INFO Thread

I'll update as well. They are a dual rate coil are they not?

Big-B1975 01-04-2020 08:58 PM

OME Landcruiser 80 springs
2851 - Stock/Light Load (0-110 lbs) 2" lift
2850 - Heavy load (110-250 lbs) 2" lift
2850J - Extended Height Coils 3" lift (Requires 60070L Shocks) **
2861 - Low height heavy load (110-250 lbs) .25" lift

UnderFire 01-04-2020 11:30 PM

I have a feeling but I haven't tried it, that the OME FJ Cruiser rear springs 895 medium duty may be the right coil for people looking to carry a little extra weight (2-300lb) and stay around 3" of lift at ride height.

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det107 01-07-2020 03:22 PM

To The Top~

Any more ideas or set ups? Please share-

JZiggy 01-07-2020 03:39 PM

Here's an idea: springs are characterized fundamentally by their free length, overall diameter, wire diameter, and number of coils. It may be interesting to include this data on the various options. This would help if we actually wanted to propose a custom spring design.

Dieselchessy 01-08-2020 02:58 AM

FJC rear spring thread. Not much lift, but maybe the ride characteristics and introduces the variable of larger diameter coils.

Solved: FJ Cruiser Spring Lift for 3rd Gen 4Runners

I know this thread is “rear coils” but it seems to me that the shocks are equally as important for ride quality. I think the conversation would have to encompass a coil and shock pair.

4-Ripcord 01-08-2020 11:23 AM

I went through the same process on my last 4runner, actually had most of these springs on it at one point or another trying to find the right one I liked.

I used some OME chart to fill in spring rates for most of them, and confirming free heights by hand measurements. The superflex and 891 are progressive so hard to give an exact value for, but superflex definitely felt softer than the 861. IMO the 861 were too stiff.

In the end I was most happy with the superflex, and would get that again if I built another t4r.



Quote:

Originally Posted by 4-Ripcord (Post 2696759)

OME 890 : 190 lbs/in - 16.7in free height
OME 891 : 210 lbs/in - 16.5in free height
Superflex: 210 lbs/in - 19.5in free height
OME 861 : 250 lbs/in - 19.2in free height

My requirements were very similar to yours: +250ish lbs, less than 3" lift, long enough to not fall out when drooped.

4runnerfiend 01-08-2020 01:05 PM

8 wraps
 
3 Attachment(s)
Sorry I don' have specific data. But..

I've been happy with LC 8 wraps with no internal cone bumpstop.
I always run with about 100+ lbs in the rear and it sits at just above 24" so about 3" lift.

When I'm fully weighted with camping gear and people shoot probably 300 lbs with all the cooler ice and water/gear.. maybe more. it sits about level with the front 23"

Just got out a did a good flex test. Grabbed the coil springs and they were not going anywhere, no chance of them falling out.
Running FJ/4th gen 5100, no sway bar, and Rokmen offraod lower links.

For me, I don't need any more travel in the rear, I need to concentrate on the front travel.

Now if I was running a 200 lbs rear bumper plus all this stuff. It would be to much weight.

AZBub 01-08-2020 05:27 PM

OME 861. You either love em or hate em. The thing is if you have a lot of gear all the time or an actual overland rig buildout in back is where these springs shine the most. Yes unloaded they sit high. No they are not for a rig that doesn’t have a ton of weight in back. A ton of weight would be along the lines of a fridge, slide, storage, support gear, rear tire swing out with fuel etc.... Just like you would re-gear to gain back performance from weight and tire size etc you add these springs to deal with....weight.


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