I made some rear bump stops. what do you think?

[Black798]

I am interested to see where this goes for the front bump stops and would also be interested in a set if they end up working better than the super bumps or beta testing if you need another guy. I think the key with the fronts is to basically have them provide a more progressive secondary bump while still relying on one stock bump stop to provide the upper limit of travel. I believe that the wheelers bumps are twice as long as the stock ones.

One issue I know they have though is that because of how the suspension cycles and pushes on them it causes the stud to rip out of the superbumps. Will that issue be solved by using the rubber instead of foam?

 

[theesotericone]

I think the key with the fronts is to basically have them provide a more progressive secondary bump while still relying on one stock bump stop to provide the upper limit of travel.

One issue I know they have though is that because of how the suspension cycles and pushes on them it causes the stud to rip out of the superbumps. Will that issue be solved by using the rubber instead of foam?

Exactly. Think of the new bump not as a bump but more of a cushion. That's why it should be made from fairly soft material IMO. Let it help the shock by absorbing some energy. That would be perfect for coming off rocks hard. The other factory bump would only be touched in super hard hits.

It looks like the superbumps use a glue to hold the bump to the washer. I wonder if it's possible to actually mold the washer inside the bump. If that's possible it should eliminate any chance of the the bond material breaking from the bump.

 

[ChildrenOfBodom]

I'm kinda shocked that no one here knows that Polyurethane bump stops have been available for the 3rd gen 4Runner for years. Energy suspension makes just about everything for 3rd gens.

Front: 8.9103 Front Bump Stops - Toyota 4Runner - 8.9103

Rear: 8.9104 Rear Bump Stops - Toyota 4Runner - 8.9104


Here are the rears installed. My testing efforts so far have shown that they definitely work. Haven't yet installed the front set yet, but I expect similar results.

 

[Plastics guy]

I'm kinda shocked that no one here knows that Polyurethane bump stops have been available for the 3rd gen 4Runner for years. Energy suspension makes just about everything for 3rd gens.

Front: 8.9103 Front Bump Stops - Toyota 4Runner - 8.9103

Rear: 8.9104 Rear Bump Stops - Toyota 4Runner - 8.9104


Here are the rears installed. My testing efforts so far have shown that they definitely work. Haven't yet installed the front set yet, but I expect similar results.

Whats the length of those energy suspension rears?

The ones I made are 5" in length. I believe the energy suspension bump stops are at 3". Let me know when you get a chance

 

[Plastics guy]

I am interested to see where this goes for the front bump stops and would also be interested in a set if they end up working better than the super bumps or beta testing if you need another guy. I think the key with the fronts is to basically have them provide a more progressive secondary bump while still relying on one stock bump stop to provide the upper limit of travel. I believe that the wheelers bumps are twice as long as the stock ones.

One issue I know they have though is that because of how the suspension cycles and pushes on them it causes the stud to rip out of the superbumps. Will that issue be solved by using the rubber instead of foam?

Exactly. Think of the new bump not as a bump but more of a cushion. That's why it should be made from fairly soft material IMO. Let it help the shock by absorbing some energy. That would be perfect for coming off rocks hard. The other factory bump would only be touched in super hard hits.

It looks like the superbumps use a glue to hold the bump to the washer. I wonder if it's possible to actually mold the washer inside the bump. If that's possible it should eliminate any chance of the the bond material breaking from the bump.

Yes, I would have a washer inside the casting itself. My rear bump stop has a large washer cast in it now. I do not believe we will have any separation issues, but if we do I can design around that. :thumb3:

As far as the shock absorbing qualities. I completely understand. I was thinking about designing a bump stop that is conical in shape made from a 40 durometer rubber. The shape itself will naturally lend to a progressive dampening affect and the 40 durometer has plenty of elongation to take continuous hits on the trail.

Should be a good starting point. If it sucks, I will try again.

 

[Dezert4Runner]

I am interested to see where this goes for the front bump stops and would also be interested in a set if they end up working better than the super bumps or beta testing if you need another guy. I think the key with the fronts is to basically have them provide a more progressive secondary bump while still relying on one stock bump stop to provide the upper limit of travel. I believe that the wheelers bumps are twice as long as the stock ones.

One issue I know they have though is that because of how the suspension cycles and pushes on them it causes the stud to rip out of the superbumps. Will that issue be solved by using the rubber instead of foam?

Exactly. Think of the new bump not as a bump but more of a cushion. That's why it should be made from fairly soft material IMO. Let it help the shock by absorbing some energy. That would be perfect for coming off rocks hard. The other factory bump would only be touched in super hard hits.

It looks like the superbumps use a glue to hold the bump to the washer. I wonder if it's possible to actually mold the washer inside the bump. If that's possible it should eliminate any chance of the the bond material breaking from the bump.

I’m running the Superbumps in the rear and love them but I’d be interested to see what comes of the front design. I agree that the Superbumps look to be too tall/firm for the front. Almost seems as if they were 1/2 the height they’d work great!

Just had a look at the superbumps. I think we can do much better than that. Wheelers say the superbumps are made of foam. Foam sucks.

We can make some out of urethane rubber. Much stronger and more options available such as the durometer (firm/soft) and other good stuff.

Does anyone have the dimensions of the superbumps? Or dimensions of what the front bump stop should be?

Help me get some info on this and I'll send out the first prototype for you to test.

I spoke with Steven @ wheelers about dims before I purchased mine. This info is straight from them.

2 7/8” free height
5/8” compressed
3 1/4” base diameter

I like your thought process of how the bump shape is contoured to make contact with the rear axle similar to the stock hard rubber bumps. It’d be cool to see something done for the front end with a slight taper that makes contact only when the A arm is at least 1/2 way through it’s travel and more parallel in relation to the ground, if that makes sense.. I’d be interested in a set for the front!

 

[Plastics guy]

Printing out my first prototype for the front bump stop. I'm planning on it acting as more as damper as some of you guys have suggested. If you have any more ideas let me know.

I read some threads about various complaints with the Timbrens and wheeler bump stops and I am doing my best to address the known problems. Such as

Angled base for better contact.

cast in place large washer to prevent any separation.

shorter overall height of the bump stop. Maybe I'll end up making two different heights to fit different lifts.

 

[Novashards]

I like the look of these bump stops. Nice job!

 

[AssBurns]

I'm currently running the Wheelers Super Bumps up front and I love them so far. Been running them for 2 years maybe? What I like about them is the fact that they are tall and super soft. Making a nice progressive feel. A lot cheaper than bypasses to achieve the similar idea.
Wheeler's makes two styles of their Superbumps. Soft for the front and firm for the rear. A couple things that I could see improving upon is the glued on washer design. I've gone through a set already due to the bump stop pulling off the washer. So if there is a way to mold the washer into the bump stop without losing any up travel, then that would be a huge plus. I also like the idea of making them a little firmer but conical to really make it more progressive as it compresses. Another thing that could be improved upon is the angle. The Superbumps are designed for a 2nd gen Tacoma/4th gen 4Runner, so they don't compress vertically enough on our rigs. They compress at a slight angle causing more stress on the bump stop and eventually causing the bump stop to pull off the glued on washer.

 

[Unner]

I'm running the Superbumps up front also like [MENTION=143526]theesotericone[/MENTION] said. Superbumps on the front of the LCA and stock bump on the rear as a final limit on compression. I would be interested to see what you come up with for front bumps.

The Superbumps are very soft, but like it has been mentioned they don't line up well with our frames. I know [MENTION=141769]Blackdawg[/MENTION] modified his to fit his first gen Tacoma better. Here's what he did:
https://www.tacomaworld.com/threads...nkensteins-helper.390488/page-9#post-13568798

If you do decide to make something for the front don't forget the Tacoma has the same front suspension so you could market the product to those guys too.

 

[octanejunkie]

Interested in lifted rear bump stops, and fronts!

 

[Renegade_Medic]

Would it be possible or reasonable to have 2 layers on the front bumpstops? One layer would be stiffer than the other layer, so you get some damping, then a lot of damping. My thinking is that if its in 2 stages basically, it's a little more gentle. Does this make sense?

Also, totally interested in getting some if/when you decide to start making them. I have been needing some rear bump stops for quite some time. My gas tank skid is nearly sawed in half from my driveshaft and I'm tired of replacing the grease zerk on it.

 

[Plastics guy]

Alright guys, I have some good news and a quick update.

The rear bump Stops are working very well. I have not had any rubbing issues on the fuel fill tube or inner fender well. They hold the weight of the truck without a problem while the truck is flexed out. I also have gone through some woops at about 30 - 35 mph to get the rear end to bottom out and it did well. not to stiff.

I was thinking about making the rear bump stops in a dual Durometer. So the last 1" or so of the bump stop would be a soft rubber with the remaining portion remaining the same firmness I have now. Ill attach a section cut (drawing) tomorrow showing what I'm talking about.

And for the front bump stops, I have these! :banana: What do you Think???

 

[octanejunkie]

Alright guys, I have some good news and a quick update.

The rear bump Stops are working very well. I have not had any rubbing issues on the fuel fill tube or inner fender well. They hold the weight of the truck without a problem while the truck is flexed out. I also have gone through some woops at about 30 - 35 mph to get the rear end to bottom out and it did well. not to stiff.

I was thinking about making the rear bump stops in a dual Durometer. So the last 1" or so of the bump stop would be a soft rubber with the remaining portion remaining the same firmness I have now. Ill attach a section cut (drawing) tomorrow showing what I'm talking about.

And for the front bump stops, I have these! :banana: What do you Think???

I think this is very encouraging and awesome to have this level of development happening within our community..well done, sir.

Might I ask, do you have a price in mind for these awesome products? I know everyone is ready to jump on in to support a forum member.

Sent from my Pixel XL using Tapatalk

 

[theesotericone]

And for the front bump stops, I have these! :banana: What do you Think???

Holy hell man. Big internet high five for the design. Looks like just about a perfect angle to contact the body mount. Did you use some CAD on those or just roll the dice?

Like [MENTION=95183]octanejunkie[/MENTION] said, it's really cool to see members kicking back some really amazing stuff. Thanks for taking the time to look into these. I'll be happy to try and break a set whenever you think they're ready for prime time.

 

[Black798]

[MENTION=146407]Plastics guy[/MENTION] I am really liking those front bumpstops. They look like they completely solve the contact angle issue and are small enough that they won't interfere with removing the CV shaft. I remember reading in [MENTION=67615]Dirtco[/MENTION]s thread that he had to remove his timbrens to get the shaft out. How are their ride characteristics so far? i agree with [MENTION=143526]theesotericone[/MENTION] and would be more than happy to put a set through their paces.

 

[JayRolla]

And for the front bump stops, I have these! :banana: What do you Think???

They look awesome! But seem way to big. Looks like they would cause you to loose up travel. Some actually shave the stock bumps down to achieve more up travel.

 

[AssBurns]

They look awesome! But seem way to big. Looks like they would cause you to loose up travel. Some actually shave the stock bumps down to achieve more up travel.

I’m assuming they would be really soft like the Wheelers Superbumps are up front. I still bottom out mine on hard hits, but it takes much more to do so now in a very progressive manner.

 

[Plastics guy]

I’m assuming they would be really soft like the Wheelers Superbumps are up front. I still bottom out mine on hard hits, but it takes much more to do so now in a very progressive manner.

No loss of up travel at all. They are soft rubber. They are intended to be compressed under the weight of the truck to simply give a little cushion before the factory bump stop makes contact and stops the up travel.

These will not prevent you from bottoming out your suspension on hard hits any more than the superbumps. You need a gas charged bump stops for a bottomless suspension feel. They were built for wheeling trails not prerunning.

Thanks for the reply guys, keep them coming. I'm getting closer to nailing these bump stops down.

 

[AssBurns]

No loss of up travel at all. They are soft rubber. They are intended to be compressed under the weight of the truck to simply give a little cushion before the factory bump stop makes contact and stops the up travel.

These will not prevent you from bottoming out your suspension on hard hits any more than the superbumps. You need a gas charged bump stops for a bottomless suspension feel. They were built for wheeling trails not prerunning.

Thanks for the reply guys, keep them coming. I'm getting closer to nailing these bump stops down.

Exactly. I do realize these are not made for pre-running, if they are anything like the superbumps (which clearly they are), they will really let you step up your higher speed performance. Obviously not to the extent of making it perform like a pre-runner but it helps take a step towards that direction of smooth, more controlled suspension cycle.

I'm looking forward to seeing these become available for purchase to compare side by side with the Superbumps. Got any pictures of how you attached the rubber to the mounting point? I'm assuming that you molded in a washer or something similar in there?