Bump Stop Spacers

Anyone install bump stop spacers to get a little more ride height on the front coilovers? Pictures or comments?

thanks

 

As an alternative, I got timberen bump stops. They are taller than stock.

 

Bump stops aren't for higher ride height. They are to keep you from bottoming out the suspension.

 

I completely read over that part of his post.

 

It's all good. I had to read it twice before replying. I'm thinking about getting Timbrens for my 2 inch lift in the rear once my new leave springs arrive.

 

I went with the durobump stops that were on sale at SDHQ for my 2ish inch lift up front and 1.75" lift in the back. Figured it couldnt hurt though it may not be necessary. The stock ones look kinda weak and rough.

 

Like mentioned above, bump stops have nothing to do with ride height. If you were thinking about adding spacers to the top of your coilover to get more height, I would highly suggest NOT doing that. If you choose to do it anyway with stock coilovers, you will still need an UCA and extended length bump stops to make up that added length.

 

“If you are currently at the max thread recommendation there is an option available to provide more lift. The max compressed length for front suspension is determined by the factory bump stops. The max thread showing is set with this dimension in mind. ICON offers a 1/4" bump stop spacer that allow for an additional 3 full revolutions of threads showing over the max recommended thread showing.

51046 - 07-UP TUNDRA/200 SERIES BUMP STOP SPACER KIT”

So what it’s saying is that by increasing height of the bump stop, I can increase the preload on the coil and get more ride height by 3 revolutions or 1/4”.

 

I do not want to increase ride height. I want to reduce preload on my coils while maintaining ride height. Initially, given the description from the bump stop spacer I misunderstood how that worked but I understand now.

Obviously need a different solution. Perhaps spacers/shims could work in this case.

 

That statement is a bit confusing and misleading. From what I gather:
-If you have "max thread showing" (which still doesn't help much), and you are not getting the lift height you want, you likely need a different spring rate.
-Max preload (which is often confused with threads showing) is basically the limit until your spring could go into coil bind. If the spring goes into coil bind before you hit your bump stops, the springs become the bump stop and can damage the shock/spring. Sounds like they are offering a longer bump stop to make up for this. Technically this is reducing your up travel, when it could be solved with swapping to the correct spring rate.
-This is also not taking into consideration the total shock travel and spring travel available.

Hope that makes sense.

 

Do you currently have aftermarket adjustable coilovers? Which ones specifically?

 

Icon 2.5 with Remote CDCV.

Max thread showing is indication of how much preload there is on the coils, set at a max of 2” of thread showing for these shocks. Meaning that if you’re at 2” of thread showing, you’re at the max ride height of 3” and at max preload. Which is where I am on the driver’s side coilover.

 

Right on. Unfortunately I do not have specs on those shocks to be more helpful on setup. If we had the compressed and extended lengths of the shocks, we could help calculate the max height of those shocks and make sure you have at least 3" of droop at the wheels. THIS article goes into more detail on what I mean

So it sounds like you are lifted as tall as the manufacture recommends, but still want more lift. Without knowing the shock lengths, it's going to be tough for anyone to offer valid advice. If you were to add that spacer, add more preload, you may have the shock nearly topped out at ride height. This will result in a poor ride since you will be constantly topping out over small bumps.

Is your truck relatively stock weight up front?

 

I do NOT want to increase ride height. I want to increase ride quality (softer) while maintaining current ride height. In order to do this I’d need to decrease preload and somehow shim/space it to maintain height.

 

"Anyone install bump stop spacers to get a little more ride height on the front coilovers?"

Ok no problem, was going off the original post.

If you are after better ride quality, decreasing preload is not necessarily going to do much for ride quality. Most of the ride quality we feel is going to be from the internal valving, not so much the spring. Icon shocks have digressive valving and tend to ride a bit stiff compared to a Fox/King which is linear. Some more details about that here

You may want to contact Icon about tuning options, if thats something they offer.

 

Your springs can’t be ‘pre’ or ‘un’ loaded

Spring is gonna the same length no matter what, you’re just moving shock parts up and down (and the truck) and affecting your travel upstroke or downstroke.

The only way to ‘unload’ your spring is gonna be to take weight off.

If you want better ride quality you need different shocks/springs/tires

 

“ICON coilover kits are preset out of the box at the optimum balance between compression and droop travel to give the best ride quality.”

These are tuned for Tundras specifically, so you have a base tuning and coil load will impact that base tuning to a degree, more preload = firmer ride. Also, these particular shocks have adjustable valving, so I can make the ride firmer or softer depending on my preferences given whatever terrain I’m on.

I’m running them pretty firm, I think a 3 or 4 (out of 10) which is on the firm side, plus with tires getting to their last 30-40% of tread the ride is even firmer.

All that said, Because of the Tundra lean, the drivers side coilover is set to max to level the truck.

Simply looking for a solution to get the coil off max preload while maintaining ride height. If it’s not feasible, I might consider lowering the front of the truck 1/4” to help.

 

Compressing the coil via the adjustment collar is what allows for an increase in ride height and vice versa. Which is why you can only compress the coil so much before you risk damage to the coil/shock.

 

Good luck with your search.

 

That’s not compressing the spring though you’re just adjusting the starting point of the shock. The spring is going to always be the same length with the same load on it

 

And you can't figure out how to make it ride better?

 

I think people need to learn what preloading is, and how it's done.

On stock suspension, if you put a preload spacer between the top hat and the spring, the coilover is going to be the same length, but the spring itself is preloaded however thick the spacer is. This means that the truck weight will not have as much downward pushing effect on the spring (since it's preloaded with a give pressure already) hence why the truck doesn't dip as much, ending in a level or increase in ride height.

Alternatively, if you take a ride height adjustable shock whether it be clips like a 5100, or a threaded seat like on a fox, you're essentially doing the same thing, except from the bottom, not the top. You're increasing the pressure on that spring (preloading it) effectively increasing the ride height. Now different spring rates will impact how much height you get. Bilstein 5100s are designed to use the stock springs, where as a fox is designed for their marched spring.

Both of these methods effectively shorten the length of the spring at its longest throw point.

So yes. A spring will be shorter at its longest throw point, if you are preloading it.

And in turn, neither of these methods will have a huge impact on bumpstops, as they aren't increasing the length of the coilover. When you add a spacer lift on top of the top hat, THEN you have to worry. You are pushing the bottom end of the shock past where the stock bumpstop sits, which is how you bottom out the shock and bend/blow it out. But any coilover modification should have some sort of bumpstop addition.

Sorry to beat a dead horse thread like this, but I hate when misinformation is not addressed and corrected. Even if it is... yikes... almost 2yrs old. People read these forums all the time looking for info, and even old bad info is still bad info.

 

Bumping a 2 year old thread?
https://accutuneoffroad.com/spacer-lift-vs-preload-spacer-vs-coilover-preload/