Prototype bumps stops....any input?

[motochris]

Thought I'de show you guys something we are working on....here's some pics of the prototypes. They are a 2.5" body, 4" travel length. We've put a plug into the top to make oil level adjustments easier. They have a c-clip that clips into the body at various postions that assists in holding the bump in place in the can, as well as having multiple mounting positions.
The production models will get a longer/thicker can, and possibly additional grooves in the body for more fine tuning of the bumps position. They should get some real world testing on them within the next few weeks.
Questions.....concerns.....comments???? Now's the time for us to make changes. Anything appreciated.

http://img.villagephotos.com/p/2003-7/269162/GEWXT-foaprotobump001.jpg
http://img.villagephotos.com/p/2003-7/269162/OIYUU-foaprotobump003.jpg
http://img.villagephotos.com/p/2003-7/269162/WQNTW-foaprotobump004.jpg
http://img.villagephotos.com/p/2003-7/269162/YFFQP-foaprotobump002.jpg
http://img.villagephotos.com/p/2003-7/269162/YFETH-foaprotobump006.jpg
http://img.villagephotos.com/p/2003-7/269162/VQVUE-foaprotobump005.jpg

[mudhound72]

any thoughts on $$$

[motochris]

Don't really want to step on anyones toes here. They'll be cheaper than most 2.0 bumps.

[SimonSays]

they look nice, is the end aluminum? or steel.

[cosmo]

how do you replace the contact pad? no flats for a wrench. adjustable oil levels? that sounds like trouble to the average consumer.

[Bulldozer]

I think a rubber striking end would be good.

Oh, and how much for an FOA T shirt?

[SimonSays]

I think a rubber striking end would be good.

Oh, and how much for an FOA T shirt?

Using a delron would be nice and a little firmer

[Kritter]

how do you replace the contact pad? no flats for a wrench. adjustable oil levels? that sounds like trouble to the average consumer.

and the top cap...no spanner holes.

[cosmo]

I don't see how you replace seals?

[Beat98TJ]

Why the offset nitrogen port?

[motochris]

they look nice, is the end aluminum? or steel.

It's aluminum, though we are looking at other materials as well.


how do you replace the contact pad? no flats for a wrench. adjustable oil levels? that sounds like trouble to the average consumer.

You can adjust the oil level on any bump. If done, it's usually done thru the schrader. We just thought we'de offer an easier way to do it for those that wanted to.


and the top cap...no spanner holes.

All the pieces will have either spanner wrench holes or flat sides for assembly/dissassebly on the production units. These are the VERY first prototypes and we just wanted to get them together for field testing.


I don't see how you replace seals?

No different than a shock, pull the wiper cap off, remove the seal head, change seals, re-assemble.


Why the offset nitrogen port?

My guess would be to make room for the plug, though I didn't ask. Why? Do you see a problem with it being off center?

[X9 Racer]

Don't really want to step on anyones toes here. They'll be cheaper than most 2.0 bumps.

I love cheaper, my budget is very limited. Are there any racers running your shocks?

[motochris]

I love cheaper, my budget is very limited. Are there any racers running your shocks?

Yea, there are a number of guys that have purchsed them for race vehicles. Mainly classes like Jeepspseed and Class 5/1600, etc. Not a whole lot yet though, as we haven't really been out long enough to prove the shocks in any race series.
Our focus is based on the play car, pre-runner, sand buggy, and 4x4 crowd really.

[Bulldozer]

So how bout those FOA t-shirts?

[motochris]

I still gotta get the shirts up on the website. I think they are $20 ea. shipped. Good quality Hanes Beefy-T in the ash grey so they don't show dirt as much.

[650Rider]

Are there any plans for 3.0 bypasses?

[motochris]

Are there any plans for 3.0 bypasses?

Possibly, but not anytime soon. We still gotta get the 2.5 bypasses out. Bypasses are a PIA with the welding and such.

[DRIVE Jon]

Do your bumps have a dividing piston? Obviously, I am a bumpstop rookie:D . I am assuming it is just like a little N2 shock..with stiff compression shims and no rebound dapening? Is there an internal rubber limit snubber?

Looks like it will be a nice product.

[Kritter]

Do your bumps have a dividing piston? Obviously, I am a bumpstop rookie:D . I am assuming it is just like a little N2 shock..with stiff compression shims and no rebound dapening? Is there an internal rubber limit snubber?

Looks like it will be a nice product.

No. Its a miniature air shock.

[Random Thoughts Racing]

Reccomend a chamfer on the receiver can that surrounds the snap ring to keep it captured. Also, is the receiver upside down in the photos? Pinching the tube in its stroke area can cause internal binding.

[DRIVE Jon]

No. Its a miniature air shock.

So it was said earlier that the bump has oil in it. So...I once again feel dumb about assuming an air bump has no oil in it.

So is a hydro-bump a miniature N2 shock (with different dampening setup), and an air-bump is a miniature air-shock?

I'm so confused:o

Another tough day in the RDC academy. I guess i will put air-shocks on my list of things to learn about...thought I could get away without knowing that one!

[therail]

Don't feel bad, I too would like to know how they work.

[evolkid]

Hydro-bump, air bump, bump stop, jounce shock...
all names for the same thing.

An air bump is an emulsion shock that has a exponentially
progressive spring rate curve due to shaft displacement.

Most come with a standard compression ratio, say 4:1.
This means that 200 psi at full extension, will be 800 psi at collapse.
You can make them less or more progressive by removing or adding oil,
respectively.

[motochris]

Reccomend a chamfer on the receiver can that surrounds the snap ring to keep it captured. Also, is the receiver upside down in the photos? Pinching the tube in its stroke area can cause internal binding.

Thanks Joel, the can is being completely re-designed. We are looking at threading the bump body like our shock and having the bump screw into the can with a pinch bolt at the bottom.
We have our Blackhawks mounted on the racecar......I smile everytime I look at those things.:D

[Randy]

It doesn't look like there is very much surface to the can for mounting and gusseting.

[Haycock]

It doesn't look like there is very much surface to the can for mounting and gusseting.

the production can will be longer and a thicker wall.



having the body threaded with a pinch will be great for adjustment.

[StGeorge-Motorsports.com]

I like the idea you have there with the different mounting style. For sure the coilover style might work pretty well.

[motochris]

Yea.....we're running into an issue or two with that. We'll have an answer soon though.

[TallKewl7]

It looks to me like you're working the bugs out and will have a nice product! If you're asking for input, I like the idea of a threaded body. And cheaper is always better, provided the quality is there. Want me to stress test some prototypes on my Baja Bug? <wink>

Marshall

[loufish]

So it was said earlier that the bump has oil in it. So...I once again feel dumb about assuming an air bump has no oil in it.

So is a hydro-bump a miniature N2 shock (with different dampening setup), and an air-bump is a miniature air-shock?

I'm so confused

Another tough day in the RDC academy. I guess i will put air-shocks on my list of things to learn about...thought I could get away without knowing that one!


They use Nitrogen as the spring, and shock oil for damping..a small air shock as stated by Kritter.
They only work correctly because they have a lot of rebound damping, allowing them to bottom out the suspension smoothly, but without the "kick" after compressing...

[BRINGTHERUCKUS]

I need a set of those to go along with my new foa rear shocks

[dan200]

Thanks for the education guys. I just learned alot... Good luck!!

[sandking]

.................so when are we going to see the bumps???

[motochris]

Few more weeks.

[sandking]

tick.................
tock...............
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Let me know when you get done with them, maybe you can put a complete package together for me (2.5 rem coils and bumps).