Bump stops....rubber vs urethane vs EVA - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 12-01-2019, 06:09 PM   #1 (permalink)
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Bump stops....rubber vs urethane vs EVA

Gents,
I'm needing to buy / install some front bump stops on my samurai. My zuk is heavier than stock....diesel, frame mods, heavy steel bumpers, sliders....you get the idea..... Guessing my zuk is 2600 lbs or so.....

I have 3.75" of front suspension compression before the leaf springs flatten. I like the OME 5 pack springs and their spring rate. The Bilstein shocks with valving works well too, but still hit my solid-rubber bump stops on hard hits while on the pavement at speed, and on deep holes on logging roads that I haven't slowed down for. The current solid rubber stops are harsh with essentially no compression.

I'm trying to research which ?universal? bump stops would be compressible by at least one inch on these big hits, in my zuk.

None of the manufactures......Daystar, Energy Suspension, etc, etc publish these specs on their products......so I'm left "guessing" if a particular bump stop will fit my needs. A universal bump stop for an F350 sure ain't going to work for my application.....

Any real-world experience on which bump stops are soft and compressible, for a 2600 lb truck?

Hydraulics are not an option for me at this time......keeping my search oriented towards rubber, urethane or EVA springs or stops.

Oh yeah....something in the 2.5" tall size is what I can easily fit. The "gap" to fit them is only about 5.5" to 6" in height....and within that gap I will need to fit the bump stop and any bracket that needs to be fabbed.
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Old 12-02-2019, 09:42 AM   #2 (permalink)
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Go to any junkyard. It’s literally full of hundreds of nice soft OE bumpstops. Get the ones that fit your requirements. Plus side is they will only cost a few dollars.

Last edited by Aisin; 12-02-2019 at 09:42 AM.
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Old 12-02-2019, 08:45 PM   #3 (permalink)
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Timbren...




That is all
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Old 12-02-2019, 09:19 PM   #4 (permalink)
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I found some really nice bump stops off of a 2000s Isuzu rodeo. Two bolts and you are done.


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Old 12-02-2019, 09:56 PM   #5 (permalink)
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I found some really nice bump stops off of a 2000s Isuzu rodeo. Two bolts and you are done.


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same with 80s toyota in the rear, hold up great to hard beatings
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Old 12-03-2019, 10:41 AM   #6 (permalink)
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Timbren...




That is all
This.

https://timbren.com/aeon-springs/

They used to have a really good chart showing all the different dimensions with different part #s for different springs, but couldn't find it just now - looks like their site's been updated. Showed stuff like regular dimensions, max deflection dimensions, weight rating, etc. Actually had stats to help build your suspension at full bump, and with the product specs offered, if you got a spring that was too stiff, you could just order the same thing with a lower weight rating.
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Old 12-03-2019, 11:32 AM   #7 (permalink)
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3rd Gen 4Runner rear bumps. They are "progressive" and can be trimmed. Might be worth looking at.
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Old 12-04-2019, 04:39 AM   #8 (permalink)
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From my personal experience poly bumps just ended up exploding. Probably changed out 3 or 4 of them.
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Old 12-04-2019, 06:26 AM   #9 (permalink)
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I just use shit out oF the junkyard. So stupid cheap and the poly ones like to explode.
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Old 12-05-2019, 07:55 AM   #10 (permalink)
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Timbren...




That is all
X2 on Timbren

I went through so many polyurethane Daystar ones. One hard hit they shatter.
I moved over to Timbren after doing some research and been racing a few years on them and still look like new.
I would have 2-3 shattered Daystar ones after a race. I contacted Daystar they said they are just not design for hard hits.

The Timbren might be large but they really work.

http://timbren.wpengine.netdna-cdn.c...ns-r070815.pdf
I run the A00540-65
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Last edited by customcreationsllc; 12-05-2019 at 08:07 AM.
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Old 12-05-2019, 10:07 AM   #11 (permalink)
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timbren are decent if you know the application you need. I am running s10 blazer rear bumpstops as the secondary bump, with smaller hard rubber as the the final stop stop...
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Old 12-06-2019, 11:28 AM   #12 (permalink)
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Timbrens are the way to go.

This is what I used on a TJ and a JK.

Timbren a525-65
https://www.sdtrucksprings.com/index...ducts_id=31546

Here is the Timbren comparison chart
http://timbren.com/wp-content/upload...ring-Chart.pdf
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Old 12-06-2019, 02:20 PM   #13 (permalink)
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Perfect timing guys, looking for some for my CJ7. Just ordered the A525-65s.

Last edited by cj7jeep; 12-06-2019 at 02:20 PM.
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