Tech Topic the week: Front Bumpstops

[rockyota83]

these are not very good for jumping

[Hyde802]

Bump for the Bumpstop thread.

[]4RunnerKid[]

Fox 2" air bumps up front:






Bravada bumps in the rear:

(not that it belongs in this thread...)

[GRMhick]

I'm running BASF micro-cellular polyurethane (Cellasto) bumpstops. They work awesome.

[LRC]

Meh, just weld some old heavy or (new if u wana buy em) rocker springs to where ever u need a bump stop, they are made to be compressed multiple times and wont rot in weather like rubber. kind of like the po-go stick idea but simpler, you could also put them inside a cylinder to be fancy. no i dont run any of these ideas, that is for you to do and test haha

[Mr Stubs]

Dual progressive bumps....

Timbrens and stock rear bumps

[Ben W]

Originally Posted by GRMhick

I'm running BASF micro-cellular polyurethane bumpstops. They work awesome.

Where do you get these?

[GRMhick]

Originally Posted by Ben W

Where do you get these?

The brackets are a waterjet part I made. I don't remember the part number to buy the bump stops.

I made 10 sets for myself and a few of my friends and still have a couple pair of brackets & bumps in my garage if your interested.

[Aisin]

Originally Posted by Ben W

Where do you get these?

Poly performance.

[PHATIM]

I just ordered the Daystar bumps for my rig. The ones with the foam inserts. Curious to see how they work.

[locost7]

Hmm, urethane is used on most cars for bump stops do not see why it would not work on the dampener for trucks or buggies

[89lc]

Originally Posted by Aisin

Poly performance.

got a link?

[hijack]

Has anyone tried these yet?

http://www.daystarweb.com/productdet...productID=1092

[89lc]

Originally Posted by hijack

Has anyone tried these yet?

http://www.daystarweb.com/productdet...productID=1092

Gen 4x4 has a thread about them. If I remember correctly, they are pretty good as a bumpstop, but don't confuse them for a air bump. I also remember someone saying the bumps inside the can wear out after so long (don't remember how long they said).

[johnsy86]

Another option we use alot in Australia is 80 series landcruiser bumps as there a progressive bump stop and relatively cheap from wreckers

[azrain]

So, I am trying to pack 10 lbs of shit in a 5 lb sack...

What I have mocked up here is a bump can, inline with the shock. The picture tells the tale of the clearance at ride height. Am I screwed here? From the few actual installations with leafs that come up on search, it looks like I may be alright. But, I am a dumbass and a glutton for punishment, so without further ado, thoughts?



I know, cycle it, etc., I am trying to get set for wheeling next week and time is short these days. Thanks fellers.

[TBItoy]

[azrain]

Originally Posted by TBItoy

picture worth a thou

Thank you sir.

[azrain]

Originally Posted by azrain

blah blah blah

Anyhow, a little feedback on the Daystar bumps. I like them, they definitely take away the metallic taste in your mouth from hitting more than a pebble. One issue. If you get a set of these and the "piston" (lol) doesn't slide free in the assembly, take it out and sand it down lightly until it does. Otherwise it will get stuck in the can. Pics and more feedback after I actually wheel it this weekend.

My setup, old school sorted leafs, toy axles at IFS width, beat up shocks, definitely a low speed rig.

[JMBack40]

I am running these Daystar Bumps up front. One of the best changes I ever made.


I will be running these poly foam SuperBumps from wheelersoffroad.com soon though.

[azrain]

Originally Posted by azrain

More feedback on the Daystar Stinger bumps. I am using the short travel bumps. First, they are such an improvement over anything else it was actually fun to bomb up and down, well, everything. Been awhile since I could do that in this rig. Currently I have the two soft inserts in them, we'll see once I install my new shocks. I may want to put a firm and a soft insert in the can to try and make it "progressive", lol.

They are noisy. They make a squeaky, squishing noise under operation. If that sort of thing bothers a person, these aren't your bit of kip. I want to play the Boogie Nights soundtrack now while I'm driving the POS.

During assembly, if the whole assembly doesn't go together freely, the "piston" can get stuck in the can. I found that out the hard way, assuming there was enough energy in the inserts to force the internals back into extension. There is not. I had to turn the "piston" down on one assembly by about .010 where mold flash was left on. Not to malign the product in any way, shit isn't always bolt on and it took a whole three minutes with some sandpaper to clean it up.

Two items would be nice to have on this bump. For roughly $200 a pair, a spanner wrench would have been nice. You will want one for assembly albeit there are other methods to tighten the caps. Also, the retaining circlip. Fawk that stupid pos spring circlip. A proper retaining ring isn't all that much more cost, even though I chose to use neither. The bump stays nice and seated in the bump can despite beating the crap out of them first run out.

The picture is pretty much where they ended up, Synergy bump cans and some flat stock gusseted in on both sides. Also, I cut up some 3/8" thick HDPE and epoxied it to the spring plates to act as a landing pad, flat sliding surface. The bump is set to contact about 1" before the spring goes flat, traveling to full compression at about 1" negative arch and the tie rod lands about a 1/2" from the oil pan. It's a trail rig, the negative arch isn't that big of a concern at this point.

Sorry to be long winded, but I really haven't seen a comprehensive review on these bumps. So, there's that then.