An alternative for the OFN32033

Originally Posted by simplechamp

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

ill be looking forward to your review..please
chris

[ANGRY-ALIEN]

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

[simplechamp]

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.

[Kcaz25]

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.

[ANGRY-ALIEN]

Originally Posted by simplechamp

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.

That sounds like a plan Champ...

Originally Posted by Kcaz25

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.

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

Originally Posted by ANGRY-ALIEN

That sounds like a plan Champ...




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?

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

[ANGRY-ALIEN]

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

[simplechamp]

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.

[ANGRY-ALIEN]

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

[_paralyzed_]

Originally Posted by chrismechanic

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

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.