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Unread 02-20-2016, 08:59 PM   #1
Fillmoreslim
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Default Heavier duty springs with the OW 2.5 kit

My 4runner is not my DD so I pretty much only take it out loaded for camping. I'm usually carrying 2 full jerry cans, 15 gal of water, tools, spares, camping gear... and I have the CBI Rear bumper.

The rear has a bit of a sag and I was thinking about trying to upgrade to heavier duty springs. Specifically I was looking at these: http://www.metaltech4x4.com/p-783-ic...t-springs.aspx

Any idea if these do have a higher spring rate than the ones in the OW 2.5 kit? Would they work with the Radflo 2.5 shocks or would I need to change those as well? Are there any other options I should be looking at? The LT kit sounds interesting but a bit pricy. Thanks in advance for any advice!
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2007 4runner SR5 Radflo 2.5 front coilovers and rear shocks, MT LT rear springs, Camburg UCA's, MT lower links, CVJ CV axles, 285/70/R17 GY DuraTracs, Stubbs HD-SKO sliders, Fuel Octane Wheels, DO front bumper, Smittybilt XRC 10 winch w/ synthetic line, Full BudBuilt skids, Weathertech floor liners, CBI rear bumper, Baja rack, Safari snorkel
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Unread 02-21-2016, 02:03 AM   #2
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The icons are a dual rate and are a "3 inch" spring. So with the weight you should get appropriate lift. They should work with the Radflos.

I most likely will be upgrading to those as well. Probably paired with Kings though.


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Unread 02-21-2016, 10:11 AM   #3
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Do you have silver or black OW springs?

There were early black rear springs by OW that were firmer, IIRC 260b/in. The later silver ones were 220 lb/in.

Ask MT what the coil rates are on those. For your application the low rate will be used with the existing weight of the bumper pretty much. So just the high rate will give you an idea.
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Unread 02-21-2016, 11:23 AM   #4
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The All Pro 3.5 inch rear coils are also an option for that cbi bumper.
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Unread 02-21-2016, 12:11 PM   #5
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Thanks for the help everyone. Andries, it looks like I got the silver springs. I'll check with Metal Tech on the spring rate of these springs, and look into the All Pro 3.5" ones. Thanks!
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2007 4runner SR5 Radflo 2.5 front coilovers and rear shocks, MT LT rear springs, Camburg UCA's, MT lower links, CVJ CV axles, 285/70/R17 GY DuraTracs, Stubbs HD-SKO sliders, Fuel Octane Wheels, DO front bumper, Smittybilt XRC 10 winch w/ synthetic line, Full BudBuilt skids, Weathertech floor liners, CBI rear bumper, Baja rack, Safari snorkel
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Unread 02-21-2016, 12:26 PM   #6
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Quote:
Originally Posted by HOJeepster View Post
The All Pro 3.5 inch rear coils are also an option for that cbi bumper.
These springs? https://www.allprooffroad.com/034run...rsuspension/45
It says that they are only 15% stiffer than stock. Wouldn't that be lower than I already have? According to Andries I have 220lb/in which would be 22% stiffer. I think 15% would put those at 207lb/in.
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2007 4runner SR5 Radflo 2.5 front coilovers and rear shocks, MT LT rear springs, Camburg UCA's, MT lower links, CVJ CV axles, 285/70/R17 GY DuraTracs, Stubbs HD-SKO sliders, Fuel Octane Wheels, DO front bumper, Smittybilt XRC 10 winch w/ synthetic line, Full BudBuilt skids, Weathertech floor liners, CBI rear bumper, Baja rack, Safari snorkel
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Unread 02-21-2016, 12:48 PM   #7
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I wouldn't recommend the APs for our rig especially if you have weight in the back. I'm running them and when loaded down they bottom out.
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Unread 02-21-2016, 05:53 PM   #8
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Quote:
Originally Posted by daPitbull View Post
I wouldn't recommend the APs for our rig especially if you have weight in the back. I'm running them and when loaded down they bottom out.
+1, same thing for me.
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Unread 02-21-2016, 06:36 PM   #9
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Default Heavier duty springs with the OW 2.5 kit

Yeah I am running the All Pros and they are on the soft side and have sagged more then I would like. So I third in suggesting not to run them.


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Unread 02-21-2016, 06:48 PM   #10
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Thanks for chiming in about the Allpros. I was just about to buy those since I have a CBI rear bumper on the way - but looks like I might go with the Icon expedition springs for the weight.
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Unread 02-21-2016, 09:13 PM   #11
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So I haven't heard back from MetalTech but in another thread I saw that the ICON guy said the spring rate is 200 over 300.

Anybody have an opinion about these coils compared to the OME 896's? I read that those are 318lb/in and are a good bit cheaper.
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2007 4runner SR5 Radflo 2.5 front coilovers and rear shocks, MT LT rear springs, Camburg UCA's, MT lower links, CVJ CV axles, 285/70/R17 GY DuraTracs, Stubbs HD-SKO sliders, Fuel Octane Wheels, DO front bumper, Smittybilt XRC 10 winch w/ synthetic line, Full BudBuilt skids, Weathertech floor liners, CBI rear bumper, Baja rack, Safari snorkel
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Unread 02-21-2016, 09:18 PM   #12
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I think the 896's only give a 2 inch lift with 300lbs in the back. I think these could be a cheaper alternative than the icon 3 inch, but with less lift
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Unread 02-21-2016, 09:38 PM   #13
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Quote:
Originally Posted by HOJeepster View Post
I think the 896's only give a 2 inch lift with 300lbs in the back. I think these could be a cheaper alternative than the icon 3 inch, but with less lift
Ahh yeah that would be a bummer. How about the MetalTech LT rear HD springs? They have these specs:

Heavy Duty Springs Specs:
Free Length - 19.25"
Bottom Coil Rate - 300lbs
Top Coil Rate - 104lbs
Lift Height - 3"

Could I put those in without changing my shocks? Eventually I might want to do the full LT setup on the rear but I'm not ready to pull the trigger on the whole kit. It would be nice if I had the springs already.
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2007 4runner SR5 Radflo 2.5 front coilovers and rear shocks, MT LT rear springs, Camburg UCA's, MT lower links, CVJ CV axles, 285/70/R17 GY DuraTracs, Stubbs HD-SKO sliders, Fuel Octane Wheels, DO front bumper, Smittybilt XRC 10 winch w/ synthetic line, Full BudBuilt skids, Weathertech floor liners, CBI rear bumper, Baja rack, Safari snorkel
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Unread 02-22-2016, 09:16 AM   #14
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I might have someone else chime in, but I think the MT LT HD springs would be too long for your 2.5 shocks. I think they were designed for the LT radflo/icon shocks. When you start flexin, the shocks wouldn't be long enough if that makes sense
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Unread 02-22-2016, 09:49 AM   #15
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3" lift height will be OK with the Radflo 2.5" shocks- Do you have the extended travel 2.5" shocks in the back?

A longer coil doesn't matter, as long as you have enough down travel left.

The bigger concern would be the 300b/in coil rate and to see if the shocks have enough rebound valving to control that. If you find that the rebound is not enough for the coils you can have it revalved to get a bit more rebound, with the weight the compression should be OK with the higher rate coils.
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Unread 02-22-2016, 10:21 AM   #16
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Quote:
Originally Posted by bulldog View Post
3" lift height will be OK with the Radflo 2.5" shocks- Do you have the extended travel 2.5" shocks in the back?

A longer coil doesn't matter, as long as you have enough down travel left.

The bigger concern would be the 300b/in coil rate and to see if the shocks have enough rebound valving to control that. If you find that the rebound is not enough for the coils you can have it revalved to get a bit more rebound, with the weight the compression should be OK with the higher rate coils.
Hmm I didn't realize you guys had an extended travel option. Did you have that in August of 2011? I definitely have 2.5" rear shocks though.

Speaking of which, it looks like you gave me the option for a slightly longer rear coil, which I believe I took. In the email you said the part number is SP-CSR-1013. Are those still 220lb/in?
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Unread 02-22-2016, 11:26 AM   #17
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What rear coil would you guys suggest for a 2-3 inch rear lift? I'm about to add a CBI rear bumper and Fox 2.5 shocks (Tundra version capable of handling a 3 inch lift). I was leaning towards the All Pro 3.5, but it sounds like users think they are too soft when loaded. Next I'm thinking the Icon Expedition 3 inch rears. Thoughts?
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Unread 02-22-2016, 12:16 PM   #18
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Yup icon overland springs.


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Unread 02-22-2016, 02:18 PM   #19
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Quote:
Originally Posted by Fillmoreslim View Post
Hmm I didn't realize you guys had an extended travel option. Did you have that in August of 2011? I definitely have 2.5" rear shocks though.

Speaking of which, it looks like you gave me the option for a slightly longer rear coil, which I believe I took. In the email you said the part number is SP-CSR-1013. Are those still 220lb/in?
Yep those are 220b/in

Did you get bump stop spacers with the rear suspension kit? If so you have the longer/extended rear shocks.
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Unread 02-22-2016, 06:13 PM   #20
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Quote:
Originally Posted by bulldog View Post
Yep those are 220b/in

Did you get bump stop spacers with the rear suspension kit? If so you have the longer/extended rear shocks.
I do have the bump stop spacers, excellent!

I guess I'm now leaning towards the MetalTech LT HD coils over the ICON overlands. If I understood everything correctly both have the 300lb/in spring rate so if my valving is wrong it will be wrong for either. The LT's however are cheaper and will give me more travel should I choose to upgrade to the LT shocks.

Am I missing anything or do the LT springs seem like the better fit for me?

Thanks again for all your help!
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2007 4runner SR5 Radflo 2.5 front coilovers and rear shocks, MT LT rear springs, Camburg UCA's, MT lower links, CVJ CV axles, 285/70/R17 GY DuraTracs, Stubbs HD-SKO sliders, Fuel Octane Wheels, DO front bumper, Smittybilt XRC 10 winch w/ synthetic line, Full BudBuilt skids, Weathertech floor liners, CBI rear bumper, Baja rack, Safari snorkel

Last edited by Fillmoreslim; 02-23-2016 at 03:56 PM. Reason: typed shocks instead of springs
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