An alternative for the OFN32033
 

Hi all I am looking for a shock bladder that would make a great replacement or alternative for the OFNA 32033 (used in the 'supershock')... Any suggestions will be appreciated...

Alien

I don't have any suggestions, but can I ask the reason? By the way Alien I just put my Supershocks back on with knuckleheads. I think you were disapointed when I put on the buggy fronts. They were fun but they and the Dug towers have been sold.

Hmm shock bladders...

Well Zack... the main reason is, I don't think the stock ones handled the recent change to Associated 70wt... All four blew out while running on a bumpy surface...
No jumps or anything like that... So I am really looking for some with a little more durability...

Alien

Hmm I'm running 60wt in mine. Did you fill them to the brim? I think you are supposed to stop short of the top.

Is that right? hmmmm... I was afraid of have air pockets... during installation of the caps, a considerable amount of the oil is pushed out...
I thought that would be enough... i will do a rebuild and see...

Alien

more holes in the pistons
 

more holes in the pistons or lighter oil 55w or revo shock pistons vdp with lighter oil

Yeah... I hear that, but the objective is to increase the dampening effect... a thinner wt will only make the truck a little too soft...

Alien

Yeah I'm not at my computer but u are supposed to fill them like 90-95 percent full.

I will review the instructions again...

Hey Zack... checked the instruction and it only said to fill the shock... nothing speaking to the specific amount... I will be doing some more test with my setup to see how it goes...
I am still however looking for a replacement bladders...

Alien

UE has sold a lot of SMs in there day, most of them had supershocks. You've seen my videos. Big air. One time I bent a shaft, (came off the standoff first) but no other problems. I'm still not at my computer (on a trip) but have you looked at the UE SS guide? I think at full compression no oil to supposed to come out with the cap off. One other thing, fluids like this have a tension on its surface that flows up the sides of any container, I forget the proper terms and because of this even something with low vececosity like water can be filled higher than the lip of its container. Also fluid is uncompressable so not enough is better than too much.

You could try the bladders from Revo/Jato GTR shocks, pretty sure they are the same dimensions. Maybe put a little pill of medium/high density foam inside the bladder to stiffen it up?

yer +1...if i fill my e-maxx shocks to the brim they will pop if i land a big jump.
the shaft going into the shock pressurizes the inside...liquids wont compress so it pops out the bladder or pops the shock top off.
i know it sucks but leave a bit of air inside them....
chris

I forgot about adding a little foam rubber to strengthen the blabber... I know it's not an absolute fix, but it should make a difference...


I hear that, but it contradicts all the principles of these shocks... if I have bubbles passing through the pistons, I don't see how they will perform well... I will also give this a try and see how it works...

Thanks guys

well yes i agree...the answer is piggy back shocks...the res will soak up the pressure...but they are more expensive.
chris.

Since the silicon shock oil does not compress, a piggy back shock will do nothing to lessen the pressure on the bladder. In full scale, piggy back shocks are mainly used to help cool the shock fluid. They are nearly worthless in small scale applications.

piggy backs
 

apart from cooling..the res on a piggy back shock is designed to have an expansion area, usually gas filled and seperated by a piston.
as the shaft enters the shock the oil passes from the shock into the res, this will push the piston down and compress the gas.
it allows a totally air/gas free shock so the oil wont foam up. full scale piggy back shocks do not use a baldder.

this is why rc shocks have a bladder, a small area full of air so the pressure has somewhere to go

as you say and quite rightly so...usually piggy back rc shocks dont really work very well, tbh making them work well in minature would be very costly...far out of reach of our price range...no to mention servicing them and recharging the gas and bleeding out all traces of air.
chris.

Gmade came out with some piggy back shocks recently that actually look like they might work as intended. Adjustable pressure on the piggyback, and the spring should allow for some of that pressure to be absorbed instead of blowing out a shock bladder.

But I don't know how well these will function. As we all know the transition to small scale doesn't always work out. Lot of tiny little o-rings, more chance of leaking.

http://www.gmade.net/bbs/zboard.php?...desc=asc&no=28

Alien have you attempted to join the UE forum? Either way if you want I could help by letting MM know. You could get more advice there at least on this issue.

Hi Zack... I do have membership at UE, but i seldom use it... Are you thinking the members may have some insite over there?


Alien

sweet shocks
 

hey thanks for posting that up simplechamp...they look awesome.
i was looking into some new shocks for my e-maxx and for the price they may be worth a shot.
they are only a few pounds more than than the traxxas ultra shocks :party:.

out of all the piggy back shocks i have seen they do look like about the best design...mind you the delrin piston looks like it will wear out fast but i can pop them off on my machines quite simply...and i have some ertalon 30% glass fibre nylon here to make pistons from too :intello:.

how about giving those gmade shocks a try angry alien ?

3.5mm shaft....yummy....i want them :surprised:

what do you guys think ???

they do some nice beadlock rims and tyres too...dam im dribbling all over this laptop :mdr:
thanks
chris.

Wow, those gmade look like the real deal. The Rc piggybacks I usually see (cheap cheap cheap stuff) just have the piggy reservoir for...bling I guess. Those look much more similar to full scale stuff, I'd love to know how well those ones works!

yummy shocks
 

well i found a u.k. supplier...they are a korean company.
£23.99 per corner...i like that :intello:.

i hear ya brainanator...they normaly just jam a bit of foam in the res and call them piggy backs :rofl: i mean come on...what exactly is that supposed to achieve

after i shed new rubber on my real car...man i looked the other day.. my car tyres are nearly bald :gasp: i got better treads on my e-maxx.
thoses shocks are mine :diablo:.
chris

Wow those are nice! I found the 103mm versions on ebay... not sure i will jump into them at this time though... but they sure look great... thanks for sharing simplechamp...


Alien

I am thinking about picking up some of the 93mm for my SCX10 scaler. For me it's more for looks, but it would be fun to play with them just to see how they work.

I wish I knew what rate springs they come with. They show these shocks as being used in all different kinds of vehicles, but the spring rates required are going to vary quite a bit. I'm sure other springs can be used, but it would be nice to know what ones they come with. Judging by that video on the Gmade website, for a scaler that would need super soft springs you might even be able to skip springs altogether and use the pressure adjustment on the piggyback to provide enough rebound.

Also, CKRC Crawlers has these shocks if people want to order inside the US. I think the Ebay ones were direct from Gmade in Korea?

those shocks look cool, bookmarked that, after 4 new tires for the jetta, paying off the credit card for a fishing trip to colorado and a week in sydney for 2 maybe I can recycle beer cans and pick up a set before the snow starts falling here

I share the same concern Champ... it seems that i would need four shocks for a maxx setup... my truck won't work with four at this time...

I am considering two things to fix my issue (for now)... the first is to add the foam rubber piece behind bladder... the second is to setup
the shock for a very low rebound... I going to try this setup in the weekend and see how it goes...

Alien

Since went off on a slight tangent regarding new shocks... just curious, has anyone experienced 'Ofna Big Bore' Shocks on a Maxx or any other vehicle similar?

Alien

Are you talking about the older 13mm big bores, or the newer 16mm big bores? I always thought UE supershocks were rebranded Ofna 13mm big bores. Could be totally wrong, but they look alike to me.

In another note, I ordered some of those Gmade piggybacks to try out.

You and me both... I am not so sure what really makes them distinct... I was wondering if the performance of the 16mm was much better than the 'Super shocks'...

Alien

review?
 

ill be looking forward to your review..please :yes:
chris

It would be cool if the piggy backs could be fitted to the 'Super Shocks'... :yes:

I think I have a 13mm Ofna shock rolling around my parts bins. Probably a long shot, but I'll test the fit for you this weekend when the Gmade show up.

BUT!! I'm not so sure Super Shocks have reoccurring bladder problem. (kinda funny wording) I would argue they don't.

Did you buy them new?
Did you follow THESE instructions. I see he doesn't say much in the ways of leaving them a certain small percentage empty, but he does say compress them.

You may not find another bladder. It's not a common upgrade. I have seen people run Losi 1/8th scale shocks on these trucks with success.

That sounds like a plan Champ... :yes:


Zack... I think you are onto something here... I totally over looked that section... I was always building the shock to achieve 100% rebound...
according to this instruction, the shock requires much less... Tonight i will rebuild with the instructions below:

iv) Refi ll to the top.
v) Screw the cap on 1-2 turns.
vi) Fully compress the shock. You need to blead off the excess. If you tighten the cap
with this much oil in the shock it will hydrolock (fl uids are incompressible) and blow
the seals out. Do not do this with the spring perch installed, you want FULL travel
on the shock.
vii) Unscrew the cap a little until the pressure relieves and oil bleeds from under the
cap’s threads.
viii) Tighten the cap down. Wipe clean


Alien

this is why i am going to try the piggy back shocks....i tried it both ways...if you screw on the cap with the shaft down the socks will weep out oil ( i have even had the oil fill up the air gap between the cap and bladder, that bladder could have had a pin hole i suppose) or the shock will pop off the top cap on a heavy landing (plastic caps only) or blow the seals.

with the shaft fully up they suck air in after a while...due to the vacuum inside, or suck in the bladder on plastic shocks.

the best i found was to go half way..hard landing gave an amount of rebound and less vacum inside at ride height to suck in air...

seeing as they are alloy shocks i would try as the instructions said.....
so whats the reoccuring bladder problem? does it need to pee every half an hour? :rofl:

cant wait to get my hands on the piggys...but i gotta wait a bit longer...its killing me :diablo:
chris

Well I have seen situations where seals allow air to pass through them and into the shock after a re-build... I also saw where getting the all the seals wet before installing them will 'reduce'
or slow this effect... I would have preferred a threaded cap for the seals instead of the c-clips...


Alien

Forgot to update this after I got the Gmade XD shocks.

They are definitely high quality and nice and smooth. Built easily and easy to bleed and get the amount of oil in each one matched. The seals are loaded in a cartridge, which should help prevent blowouts in bigger trucks. That along with the functional piggybacks makes for a nice set of shocks.

The included oil was unlabeled, but looked quite thin, I'd guess 10-20wt. It has a yellowish tint, and I doubt it's pure silicone oil. I decided to use real 30wt silicone oil. The included medium springs are pretty soft, but I ordered some soft springs to try too. Probably leave the medium in front on my SCX10 since the battery weight is there, and use the soft in the rear. Taking vacation 4th of July week, so I'll get some good testing in then.

And Alien, unfortunately the piggyback caps do not fit on the Ofna 13mm shock bodies.

Hey Champ... thanks for the update man... The sounds like a good buy... pitty the piggyback won't fit...

I rebuilt the shocks with a new set of bladders and followed the instructions which was basically a setup for low rebounds... the shocks still
has some nice dampening tendencies even with this setup and 70wt... when i get some time, I will do a little thrashing and see how well
they'll hold up.

Alien

It's closed cell foam, and it acts just as the bladder in the cap does. It compresses under heavy loading to take some of the force away, theoretically saving the seals.

I put integy piggybacks (just the piggybacks, traxxas shocks) on a set of traxxas ti-ni big bore shocks on my cybermaxx and they have been incredibly reliable shocks.