Member
Join Date: May 2017
Location: Left Coast
Posts: 105
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Update: Photos Coming Soon
So I went on quite the suspension venture with this one. This 4Runner really tested my knowledge. Being a stubborn *******, I dismissed the advice of those who know there stuff (aka Scott @ Camburg). So below, I am going to share my experience so others dont have to spend 5 or 6 weekends in a row swapping shocks and springs. I've gotten my time down to 1.5 hours to swap front shocks and springs, including spring compression. Level: Master Builder.
I decided against coilovers because this thing is a pavement princess and will only see dirt 1% of the time. And when it does see dirt, I am not trying to keep up with a trophy truck through 3 foot holes where I have to worry about shock fade ect. I really question those who claim they are experiencing shock fade, because it takes a lot of speed for an extended period to get shocks hot enough to fade. Dont get me wrong though, coilovers out of the box are the best solution for these trucks, just a whole lot of overkill. I ran the first set of Fox Extended Length Resi Coilovers with an Upper Arm on a 2010 Tundra and they thing was like a boat on the morning glass.
1.
Front: Dobinsons 302 Coil / 700 Strut
Rear: Dobinsons 723 / Stock Shock
Lift Gains: 2.75"+ Front / 2.25"+ Rear (The rear sat about 1.5" higher than the front, measuring hub to fender)
The stuff from Dobinsons is heavy-duty. There coils have a few extra turns than most other products on the market. The wire is 17mm, and you can tell. The springs are heavy. I have no doubt in my mind that these would hold up over a very long time. If you beat the S out of your rig, you may want to give there stuff a shot. Especially the guys hauling a ton of extra weight. The on road feel was solid, not as comfortable as I had hoped for, but it definitely handled like a sports car. Low speed "sharp" bumps were a little rough, which is understandable considering how burly these springs are.
1A.
Front: Dobinsons 302 Coil / 700 Strut
Rear: Dobinsons 599 / Stock Shock
Lift Gains: 2.75"+ Front / 1.5"+ Rear (The rear sat about .5" higher than the front, measuring hub to fender)
I swapped the rear 723 Springs for the 599 Springs. Gave me a very even lift.
2.
Front: Dobinsons 302 Coil / OME 90010
Rear: Dobinsons 599 / OME 60080
Lift Gains: 2.75"+ Front / 1.5"+ Rear (The rear sat about .5" higher than the front, measuring hub to fender)
This time around, my general thought was shocks. The ride felt stiff with the previous set-up. I couldn't feel the suspension working. My thought was the stock rear shocks could not keep up with the new rear coil springs, and larger heavier tires. So I installed the OME 90010 up front and they 60080 out back. This was the set-up I ran on my Tacoma (Different Shock Numbers Obviously) and it rode like a dream. Not the case for the 4Runner. The front end felt more controlled paired with the Dobinsons 302 Coil Spring, the rear felt like I was running 2x4's in place of shocks. I thought my rig was going to buck me out. The rear OME shocks are definitely designed to haul 200+ lbs of extra weight. So those were out.
3.
Front: Dobinsons 302 Coil / Bilstein 5100 Set @ 0.
Rear: Dobinsons 599 / Bilstein 5100
Lift Gains: 2.75"+ Front / 1.5"+ Rear (The rear sat about .5" higher than the front, measuring hub to fender)
I will say this I was nervous about running the 5100. I used these on a 2014 Tundra and they didn't ride the way I had hoped. However, these worked the best thus far in my quest to find the ride I was looking for. They sharp bumps in the road were still there, but generally the ride dynamics had improved.
4.
Front: OME 2884 / Bilstein 5100 Set @ 0.
Rear: Wheelers T13 / Bilstein 5100
Lift Gains: 2.75"+ Front / 1"+ Rear (The rear sat a little less than .25" higher than the front, measuring hub to fender)
Still not satisfied, I tried the OME 2884 Spring and added the T13 spring out back. I was a lot closer at this point. The ride was really good for the amount of lift I was getting. The T13 is an excellent spring, felt like stock just with more lift. Really happy with these, Wheelers nailed it. Now I know with past Toyota trucks, they really dont like anything over 2.5" without an upper arm. They like a lot of droop! Knowing this, I knew the amount of lift I was getting in the front was too much and this was contributing to a pogo-stick like ride. Rather than the suspension moving the body was moving. NEXT.
5.
Front: OME 2883 / Bilstein 5100 Set @ 0.
Rear: Wheelers T13 / Bilstein 5100
Lift Gains: 2"+ Front / 1"+ Rear (The rear sat a little less than .5" higher than the front, measuring hub to fender)
So I swapped the 2884 for the 2883. I felt like this was it. The end of the road. The ride was the best it had been through out all of the suspension changes. It felt good. Stable at speed, cornering and braking all felt great. Thought there was still apart of me that thought "it could be better". At this point my neighbors were beginning to wondering if I was running an auto shop out of my garage. 5 Weekends of the worlds loudest air compressor and the sound of an impact grinding up a harbor freight spring compressor. (Note: If you are using a threaded rod spring compressor, get some High Pressure Lube used in machining applications, it will prolong the life of the tool. You only need a little amount, about the size of a pearl right at the nut on the threaded rod. Makes everything butter smooth and helps with the heat.)
Now prior to picking up the 4Runner, I had planned on running the Bilstein 6112 from the start. This was based off my research and the advice of those who had direct experience with them. However, Dobinsons was a new name and a new approach to dialing in Toyota suspension. I was hooked and wanted to give it a shot. The Dobinsons stuff is great, I think they are going to bring some killer products to the market in the future. You can tell they've put in a lot of R&D into their springs to bring a no-bullshit product to market. I was not given a discount, or anything for free I paid the same price anyone else would pay and I am saying this to add some integrity to my opinion. Though it didn't work for me, I really wanted it too! Those springs look really cool under the 4Runner.
So even though I was pleased with the 2883/5100 and T13 combo, I was still very curious about the 6112. Long story short, impulse kicked in and I had a box of the 6112's 24 hours later. The rear shocks 5160's are on order. I had to give them a shot.
6.
Front: Bilstein 6112 w/Included Spring Set @ 6th Perch (2.2") on bothsides
Rear: Wheelers T13 / Stock Shocks (5160's are on order)
Lift Gains: 2.2"+ Front / 1"+ Rear (The rear sat a little less than .5" higher than the front, measuring hub to fender)
This is the finish line. I made it. Holy guacamoley. The 6112 is the pinnacle of a non-coilover solution for the 4Runner. I was very skeptical because I've always created lift using longer springs, never by compressing the shit out of the stock spring. So the fact that Bilstein was using this method with a 600lbs spring I was having a lot of doubt. I was wrong. 110% Wrong. The ride is exactly what I was looking for. Like others have said, the ride is very controlled. It almost eliminates all of the sharp road bumps. There is no bounce (commonly felt among 5100's), the handling is perfect. Stable at speed and eats up any road imperfections with ease. Still a little brake dive but thats to be expected on a short wheel base, coil sprung rear rig like the 4Runner. I am only mentioning brake drive once in this post because honestly brake dive is normal for properly functioning suspension geometry. So the guys getting all crazy about brake dive need to understand what it is, and why it's happening before trying to eliminate it. Take a stock 4Runner to an alignment guy who uses a tape measure and not a laser and ask him to fix the brake dive, because a lot of it is in the geometry.
Bottom line: Happy, very happy. I invited those local to OC that are on the fence about suspension to come drive my 4Runner.
I know I am going long here, but I want to try and provide everything I learned in this process.
KDSS:
Now this is my first experience with KDSS and I am really impressed with it. I know there a lot of mixed reviews out there but if you looks at the engineering behind it, it's a really cool system.
I was a little troubled by all of spacer talk to correct the "lean" since there is a way to correct it without spacers. I have the 6112's set evenly. They are on the same perch side to side.
Each time I put the front end on jack stands I opened the KDSS valves 3 full turns. Now in order for this to be effective, you need to have all 4 wheels off the ground. Since I was too lazy to jack up the rear end, the KDSS rams are still hard to move. However, I was going to need to open them anyways to correct the lean. Once the 6112's were on, I dropped it back on the ground and it was leaning to the driver side. Before closing the valves I went over to the passenger side and stood on the running board evening out the stance. Yes, that's all it took. I closed the valves and drove it. As of writing this the stance is perfectly even side to side. So you can throw spacers at your truck all day long because every situation is different (added weight, ect.) I am just giving you my solution and results.
So tips for reinstalling the swaybar with KDSS:
(Note: this may not be the proper way, but it was the fastest easiest way for me)
1. Attach the passenger side or side opposite the ram first.
2. Use (2) speed clamps to pull the swaybar towards the arm.
3. Bolt the lower hole first.
4. Use a screw driver to align the braket with the top hole. (There are holes for a screw driver on the mounting surface and on the bracket for exactly this purpose)
5. Profit.
Last note:
This is likely a placebo, but I did a zero point calibration after all of this for good measure. I swear it helped. I was not having any traction control issues, just thinking about the change in ride height and how it affects the yaw sensor.
That's what I've got for now. I will likely add to this post as I find my grammar and general writing mistakes.
7.
Front: OME BP-51, No Pre-Load
Rear: OME 2895 Spring / OME BP-51
So after the 6112 I thought I was done. Seriously, I was happy. Then my curiosity started to wander. "It could be better" I woke up and there was ARB/OME boxes at my door step. So I know this is really going to disrupt my mini-rant regarding coil overs. I was dead set on making the coil and shock set-up work. After a trip out to a remote spot in the Grand Canyon carrying a passenger and the pup, plus food, tools, luggage, and camera gear, she was a heavy pig. I could feel it over big holes. There were a couple of holes that my dash cam saved as "incident" as if I was in an accident. I was going about 40mph over these holes, and it was a decent hit. The rear was the biggest issue, couldn't hold the weight, and this was before my rear bumper and spare tire. I had to back off the gas a bit and check up at bigger holes to keep the rear end from bouncing off the bump stops. Long story short, I needed more dampening. The 4Runner is my first SUV, it's been all Tundra's and Tacoma's up to this point. So I was approaching the 4Runner just as I had approached the Tacoma in the past. Only problem is, the 4Runner is nearly 1000 lbs heavier. I should have known that. This is the reason I was so adamant about making a coil and shock combo work. So now I've got coilovers, and they are glorious. I have not touched my suspension since they were installed. They work great. The most surprising feature is the rebound and compression adjustments. I didn't expect to feel any change after just one "notch" of adjustment, but I did. Shortly after installing my rear bumper and spare tire, the rear end was loose, scary loose. Added (2) notches of rebound, and problem solved smooth controlled ride. Below are some of my impressions from another post:
First Impressions
Huge. I know, thank you. These things are no joke. I seriously wondered if the front coil overs where going to fit in the bucket, because they are massive looking. The same applies to the rear, the shocks remind me of something you’d find on the back of a Class 1 car. In my head I was thinking, these are way too for this little baby 4Runner, it’s going to ride like a dump truck. – More on this later. The anodizing is very nice, all of the components look tough and durable. All of the hardware is black.
So if you’re familiar with my build thread you’ll know I have been through the 4Runner Suspension a few times. More than a few times. Enough times that I can change shocks, and coil springs on the front end in 1.5 hrs. using a floor jack and hand tools. (Patting myself on the back). This time around took me all day. Literally all day. Here’s why.
Prep
The BP-51 comes from the factory set to 20mm of preload.
I knew right away this was going to be too much lift for me. So I planned on taking 10mm of preload out. This required my trusty/sketchy Harbor-Freight Spring Compressor. I proceeded to attempt to compress the spring for about an hour. There is very little clearance between the body of the shock and coil spring. I chewed up the body of the shock pretty good and didn’t get very far. I was pretty upset. Before I did any more damage, I went to the Auto Parts store to get a different compressor. The spring compressor I got was a no go, same scenario. So I decided to take the “hooks” on the spring compressor and grind them down on a bench grinder for more clearance. This worked. I was able to compress the spring enough to adjust the collar without the hooks digging into the shock body.
Notes:
Use a lot of oil when making collar/ride height adjustments. On the threads, and especially between the spring and collar.
DO NOT back the pinch screw all the way out. If there is any tension on the collar while making the adjustments with a spanner wrench, the collar will skip/jump threads on the body of the shock. Loosen the bolt enough to allow the collar to spin.
Make sure your pinch bolt is positioned “out” so it is accessible once the coil over is mounted on the vehicle for future adjustments. Although from my experience, it is best to remove the shock.
Rebound and Compression Adjustments
I decided this was a good time to make changes to the rebound and compression while it was easily accessible. I adjusted all 4 shocks with 0
Comp / 4 Rebound.
For the Front OME Recommends
0-4 Compression (For Unloaded Vehicles)
4-8 Rebound (For Unloaded Vehicles)
Note: I made these adjustments off the vehicle, using a vice with soft jaws to hold the shock. Using the supplied spanner wrench it does take a little bit of force to turn the adjusting barrels. If you’re making adjustments while the shocks are installed, coil overs will be easy, rear shocks will be a little more difficult because they will want to spin. Tip: Use a leather belt wrapped around the body of the shock to hold the shock in place while you make the adjustments.
Install
Now all (4) Shocks were adjusted and ready to be installed. I tore down the front end and began installing.
Specific to the 4Runner, the Front “Fitting” Kit varies Left to Right. So it is important to follow the instructions. The same applies to the rear fitting kit.
Mounting the front coil over is straight forward. Mounting the reservoir takes some penitence. Unlike other manufactures, OME is using a really nice machined collar to mount the reservoir. The base of the collar has a t-slot that slides over the head of a 6mm bolt. Takes some finesse to get situated, and secured. The mounting position of the front coil over reservoir is outside the splash guard on the driver side and inside the splash guard on the passenger side.
On the right side, after install I noticed a bolt on the outside of the AC compressor was making contact with the reservoir when the engine was running. There wasn’t much I could to fix this (moving the reservoir forward or backward would not have made a difference). So I flipped the bracket, using one existing hole and drilling an additional 6mm hole I was able to make the reservoir mount outside the splash guard, similar to the driver side. There is less room inside the fender on the right side vs. the left side on the 4Runner. The right side houses a portion of the window washer tank. I addressed this issue with OME.
Note: OME emphasizes the proper position of the reservoir to avoid contact with the hose. So keep that in mind when mounting.
Mounting the rear shocks was pretty straight forward. The reservoir brackets mount under frame using existing 8mm bolt holes.
Again, the brackets are specific right to left.
Once the reservoir is mounted, check the clearance on your hose.
The Ride
Most peoples first and only question.
Adding large, heavier, stiffer tires to any vehicle is going to significantly reduce the on road comfort. Adding a suspension system capable of handling those larger wheels and tires is the key. I think I’ve found that with the BP-51.
I started with the settings Front: Comp: 0 Rebound 4 Rear: Comp: 0 Rebound: 4. This gave me a very plush ride. The suspension absorbed everything. The rear carried on a bit after larger bumps so I knew right away I was going to need more rebound. After I made the adjustment, it was pretty amazing to be able to feel just (1) incremental adjustment. The rear was much more controlled now. I will likely increase by rebound in the rear by (1) more, putting the rear rebound adjustments at (6) and increase the front rebound by (1) putting the rebound adjustments at (5)
The 4Runner feels very controlled and planted now. It handles all road imperfections with ease. Doesn’t toss you all over the road or the cab. The 4Runner feels flat in the corners, I am much more confident carrying a little more speed around corners knowing I am not going to get thrown around. Basically, I can’t hear anything rattling inside the cab any more (The sound of plastic interior panels shaking/rattling over rough terrain).
All of these observations were made on the road, I have not taken it in the dirt-yet.
The biggest improvement is the compression dampening. You can feel the shock working. You can feel the suspension compress. You can feel it absorb the road bumps.
While driving a rough freeway, I tilted my mirror down to watch the rear tires, I was amazed at how much the suspension was moving, and how almost none of the movement was being transferred into the body. Basically the suspension was doing its job.
Last edited by onepremiere; 12-04-2018 at 05:19 PM.
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