Icon's rear hydraulic bump stop

[swimmerdude1127]

Hey all, was doing some reading today and came across the hydraulic bump stop system made by Icon for the FJ/4Runner rear suspension. Is anyone running this on their rig and/or know anything about it?

http://www.iconvehicledynamics.com/...unner-Rear-Hydraulic-Air-Bumpstop-System.html

I'm curious as to how specifically it works. I'm assuming this replaces the rubber bump stop that's stock on the truck. Right now I have the Metaltech bump stop extensions so if I did get this kit I'd assume all that would come off and be replaced by this hydraulic stop?

 

[mikey's2010SR5]

Hey all, was doing some reading today and came across the hydraulic bump stop system made by Icon for the FJ/4Runner rear suspension. Is anyone running this on their rig and/or know anything about it?

2003+ Toyota 4Runner Rear Hydraulic Air Bump Stop 56104

I'm curious as to how specifically it works. I'm assuming this replaces the rubber bump stop that's stock on the truck. Right now I have the Metaltech bump stop extensions so if I did get this kit I'd assume all that would come off and be replaced by this hydraulic stop?

You would still have the Metaltech bump extensions. These go inside the coil, replacing the cone bump and work in conjunction with the outer bumps. Only problem is with your extensions you really won't hit these. If you run stock length bumps then you are good. You might be able to run these only but that would be a good question for ICON to see how they were tuned.

 

[MT4X4]

Hey all, was doing some reading today and came across the hydraulic bump stop system made by Icon for the FJ/4Runner rear suspension. Is anyone running this on their rig and/or know anything about it?

2003+ Toyota 4Runner Rear Hydraulic Air Bump Stop 56104

I'm curious as to how specifically it works. I'm assuming this replaces the rubber bump stop that's stock on the truck. Right now I have the Metaltech bump stop extensions so if I did get this kit I'd assume all that would come off and be replaced by this hydraulic stop?

You would have to run extensions on the air bump stops to have them contact at the proper time. That being said you will be constantly engaging them which will provide a less than desirable ride. If you want to replace the factory rubber one with the air bump you will need to mount them to the outside of the frame which would be a custom job.

 

[swimmerdude1127]

You would have to run extensions on the air bump stops to have them contact at the proper time. That being said you will be constantly engaging them which will provide a less than desirable ride. If you want to replace the factory rubber one with the air bump you will need to mount them to the outside of the frame which would be a custom job.

So in summary, it ain't really the deal if you're running a lift...

 

[borfoo3]

Hey guys,

Reviving this instead of a new thread. Anyone running these even in stock height? Wondering if they provide any noticeable upgrade vs OEM for off-road handling or other benefits for the rear end.

 

[4Rager]

Hey guys,

Reviving this instead of a new thread. Anyone running these even in stock height? Wondering if they provide any noticeable upgrade vs OEM for off-road handling or other benefits for the rear end.

My understanding is hydraulic/air bump stops air really meant for desert racing, where you're frequently bottoming out your suspension from going over bumps at high speed. In that situation I assume it would provide a much less jarring feel when you bottom out, as well as protect your suspension internals by absorbing a lot of energy before the shock actually does bottom out.

 

[borfoo3]

My understanding is hydraulic/air bump stops air really meant for desert racing, where you're frequently bottoming out your suspension from going over bumps at high speed. In that situation I assume it would provide a much less jarring feel when you bottom out, as well as protect your suspension internals by absorbing a lot of energy before the shock actually does bottom out.

Yup, and a better controlled rebound vs stock rubbers which is exactly what I'm after.. just hoping someone who's used them could share their experience.

My concern is the response from the (FJ forum) ICON announcement stating that "This bump is designed to be used with a 2" rear coil spring."
I'm at stock height, and not looking to go higher.. So don't want to end up having them limit rear travel with the stock springs.

FJ Rear Air Bump Official Release - Page 2 - Toyota FJ Cruiser Forum

 

[borfoo3]

2003 - Current Toyota 4Runner Rear Hydraulic Air Bumpstop System (SKU 56104) fit

Got an email response from Scott Spiva @ ICON:

"This kit will work with the stock coil springs. They are designed for a 2-3” lift so at stock height you may notice that they will engage more often due to the fact that you will not have as much up travel at ride height as you would if you lifted it, but they do not limit your up travel at all. There is no cutting, drilling or welding required to install them. Let me know if you have any more questions."


Guess I got the fit answer (for my 2015 T4R TEP w/KDSS and stock rear springs w/ Bisltein 5160s). Real world feedback would be nice.. but its been a while since my last impulse buy so.... :biggrin1:

 

[Range]

I'll offer what I have experienced. It's like slamming on your brakes (factory bump stops) vs. slowly applying the brakes (ICON bump stops). I had them in Vegas when I rode out in the desert because you can reach speeds in excess of 70 mph's on dirt/sandy roads. It was awesome especially if you have a great shock set up. I sold mine to my buddy and I put the OEM back on because out here in Utah I knew I wasn't going to make use of them the way I did in Vegas.

 

[LawnDart]

Bingo! I debated doing the ICON bump stop kit, and ultimately just decided to upgrade my bump stops to the Timbren's. Front and back. A lot cheaper and I don't do desert racing, so this seemed like cheap insurance.

If you go bombing around at 70mph in the desert, sure, go buy the icons. Otherwise I don't know if it's money well spent.

 

[borfoo3]

I'll offer what I have experienced. It's like slamming on your brakes (factory bump stops) vs. slowly applying the brakes (ICON bump stops). I had them in Vegas when I rode out in the desert because you can reach speeds in excess of 70 mph's on dirt/sandy roads. It was awesome especially if you have a great shock set up. I sold mine to my buddy and I put the OEM back on because out here in Utah I knew I wasn't going to make use of them the way I did in Vegas.

Was that in a lifted truck? If so, roughly how high was it compared to stock?

at 7.1" (vs ~5.5" stock?)extended length for the icons, my guess is these would engage quite often with my desired OEM stock height which could affect handling..

 

[Range]

Was that in a lifted truck? If so, roughly how high was it compared to stock?

at 7.1" (vs ~5.5" stock?)extended length for the icons, my guess is these would engage quite often with my desired OEM stock height which could affect handling..

Lifted 3" all around. It really does take quite a bit of force to get the truck to compact hard enough to hit the bump stops when you have aftermarket shocks and coils. If you're driving with an OEM set up and you're constantly engaging the bump stops, you're begging for trouble.