Ironman 4x4 Suspension

Uh... that's too much for the lean... you want 1cm max.

And why do you have hardly any threads showing? What is the ride height supposed to be?

 

It’s the 3.5” pre assembled units.. these springs appear to be much longer than the previous version

 

The lower perch takes up some of the length... but that kinda sucks. Like you're SOL if you want a 2" lift now. So weird that they'd go even longer, they already had the longest shock coil in existence!

I wonder if they are using just one coil now? Before they had four of them, and they only need one for an adjustable shock.

 

I'll add more information about ride height, how it rides, etc. once I get them installed. I'm out to sea until next week, so it'll be ten days or so

 

Doesn’t look like it has much tread left. Could it be a design flaw? That can’t be right.

 

Alright, got ‘em in! It’s on the alignment rack now, but my initial impression with the redesigned strut is positive! The driver lean is corrected almost perfectly. The ride height is right where the old struts were, 3.5”ish lift. But the most noticeable difference is ride quality. I haven’t put enough miles on them to really describe the difference, but I’m noticing right away that the truck feels less jarring when I hit potholes, or dips in the road.

 

Glad you are happy, but shit...

a) Looks like the new springs really are longer or a higher rate, and combined with the thicker perch, adjusting for less than 3.5" lift isn't possible.
b) I like the old valving. Sounds like they may have made it softer. Or you are just experiencing the lack of rub on the shock body...

 

I sent my, bought over a year ago, unassembled front struts back to Ironman last week to trade them in for these new preassemble struts.
I didn't want any problems when I install the lift. Ironman 4x4 customer service has been nothing but excellent so far.
I asked if they could assemble them to lower specs than 3.5" and they said they cannot. I would like to set them to 2.75 inches. I have a lot of weight in the bed and would like the truck to have some front end rake.
Hopefully this won't be an issue adjusting them to a lower height.

 

Did you ask if *you* can adjust them lower? I don't see how you could if they are like CaptainCobbs... well maybe 1/4" or something.

 

With the new spring's ground flat ends it seems like we may be able to crowd source some dimensions for total length, ID, and OD. Then we could determine if the springs are interchangeable with any other off the shelf coilover springs. Previously they were not compatible due to the spring ends not being flat and IM wouldn't provide dimensions. This would allow people to select different spring rates and lengths, therefore also allowing some possibly lower lift options (within limits of shock stroke).



Dangit, I already sold my old spare icon coils.

 

Old coils were 128mm OD at the top, 113mm at the bottom. Coils were 19.2mm with paint, and ~470mm long. Stock spring rate was just under 600 lb/in as I recall.

So, ID from 3.52 to 2.94" and 18.5" long. So a 3" ID spring, 18" long, and 600 lb/in should work. But you'd need a different top/isolator. Where can that be bought?

https://accutuneoffroad.com/product/eibach-3-0-id-springs/

 

Response from Ironman


Thank you for reaching out to Ironman 4X4...

You can set them lower. I would not go any lower than 3 inches at most. The reason is the rear will sit really high if you go lower.

We are currently out of stock on the Tundra UCAs. We will have them back in stock as soon as we can. I do not have an ETA of when we will have them in stock.

 

I guess on the drive side you can use two collars as low as they go, and on the other side remove one collar and bottom it out the remaining one.

They need to have someone look at this... surely there is one engineer on the payroll?

 

Yeah, that's a really long spring. Wondering if could run shorter 3" spring on new flat perches to allow lower lift.

 

Sure, in theory. Although the clearance on the shock body will be super tight with a straight coil. Where would you get the perches?

I'd wait for more info. I can't tell what the hell is going on. The Tundra lean is <10mm, so you should only need 5mm (0.2") difference in the bottom perch. CaptainCobb has a hell of a lot more than that. Your lift delta should also be ~1.7x the perch delta. So if you get a shock set for 3.5" and you want 2", dropping the perch down ~.9" or 22mm should do it.

 

Reposting this old spring page. The old ones were 10mm different L vs R. So to match that you'd have 10mm (0.4") difference in perch height, not the 5mm I thought. Still looks like the difference is double that though.

I got HD springs which are supposedly only 5mm longer than standard, and I have 18mm of threads showing with a 2" lift. What is the spring, lift, and exposed threads that the rest of you have? Trying to nail the lift vs perch relationship. Thought it was about a 1.7 ratio, but now I'm not sure.

 

Scaling off CC's photo above I get ~30mm thread on the new shock and 60mm on the old one. I got 2" lift with 18mm and the long coils, so would have been 23mm with the short ones.

So theoretically, 60mm-23mm or 37mm on the perch is about 1.5" (38mm) in lift... or a 1 to 1 relationship?

 

What’s the skinny on the regular foam cell coilovers? White shocks/green springs. I see not many in this thread are using them as opposed to the Pros. They’re on sale for $719 and seem to be nice for the price range. I see the FCP coilovers are still not available for purchase separately from the lift kit.

I’m looking to replace my Toytec Ultimate adjustable coilovers which are made with eibach springs and 5100s, one of them is leaking and there’s a little rust going on at the top plate. I think I’m in the 2.5-3” lift range and would like to replace with something similar in height. Are these regular foam cell coilovers really 3.5” of lift? I see they aren’t adjustable, and 3.5” may be a bit more than I’m looking for.

Are the regular foam cells the best option in that $700-$800 price range?

https://ironman4x4america.com/foam-cell-prebuilt-front-coilovers-suited-for-2007-2021-toyota-tundra/

 

Sorry guys, I wish I could be more help when it comes to the measurements and reasoning behind it all. It does seem like a drastic difference in adjustment from the passenger strut to the driver strut, but in my application it is working perfectly. For once my truck is sitting level. I’m heading to the gas station in a little bit, and the pump pad is nice and level, I’ll pull hub center to fender measurements from both sides for you guys. Hopefully that helps determine how much lift I actually have…
It’s been years since my truck was stock height, so I don’t have any point of reference

 

Okay, my hub center to fender measurement is 25 1/8” driver side, and 25 1/4” passenger. I’m sure the pump pad isn’t perfectly level, but that’s pretty damn close

 

Mine are both 23.9", and ~.2" less than the stock rear. You are about 1.25" higher, which I think would be ~3.25" or a hair more. You may get a little more settling, but not much with only one isolator... unless they installed with some bushing resistance.

Any chance you can measure the length of threads showing under the collars?

 

Yeah, here’s what I’ve got. Looks like about an inch on the drivers side, and 3/8” on the passenger side

 

Thanks! By my eye there is ~.75" difference or 19mm. Huge difference. Almost double what they used to give for left vs right.

 

I'm only talking about swapping springs on the NEW FCP shock with flat end springs and new flat lower perch, I suspect spring ends are same diameter on the new flat end straight springs.
It looks like the top mount/isolator is just OEM style on both new/old FCP shock.

Kind of a moot point if you can only buy the new FCP shock with spring in the full lift kit, would have to separate out. OR anyone with the old shock that knows a machinist might be able to reproduce the new lower perch and pair with a custom spring of their choice!

 

3" springs won't fit the top isolator, plus I think the shock body only gives you 0.1" clearance to the 3" spring. It'll rub if there is the tiniest misalignment. The stock spring diameter opens up pretty quickly to a 3.5" ID.

One thing we could maybe do is remove one of the threaded collars on the non-drive side, move the remaining collar to the bottom, and use the setscews and some loctite to keep it there.

@CaptainCobb ... does the bottom perch have a lip on it to keep the spring centered and so it doesn't hit the threads? If not, McMaster Carr sells stainless and galvanized washers that should fit and are ~.23-.34" thick. Could use these instead of the flat perches. https://www.mcmaster.com/Spacers/for-screw-size~2-3-4/
EDIT: Scratch that. The new spring doesn't taper to a 3" ID, it's ~3.4" based on scaling the photo, and I can't tell if it tapers at all. That would make sense if there was a lip on the perch since they'd need some space for it.

Surely they'll eventually have springs and shocks available like before...?

 

I heard they will be restocked in June

 

I recently added two CB 1/4" shims to my drivers side and it almost removed the lean, still off by about 1/8". But it looks level. The strut adjustment height to wheel height ratio is not linear. If it were, two shims would have added an inch to my fender clearance on the driver's side. But it only added a 1/2".

 

It's not exactly linear, but fairly close... CB advertises that you only need one shim to deal with the lean, right?

 

@CaptainCobb ... does the bottom perch have a lip on it to keep the spring centered and so it doesn't hit the threads? If not, McMaster Carr sells stainless and galvanized washers that should fit and are ~.23-.34" thick. Could use these instead of the flat perches. yes there is a machined lip as you describe. You can see is in this picture if you zoom in

 

I’ll be installing the newly designed FCPs courtesy of Piki, thanks man! They appear to be set up very similarly with the preload to Sea_weathered’s. I figure I’ll install them that way and see how it sits, and then make any final tweaks before alignment. I guess as they come I should be at roughly 3.5”, but ideally I would like more like 2.5-3” of front lift. How much might my extra 100lbs or so under the hood lower the front ride height from that 3.5”?