Go Back   oOple.com Forums > Car Talk > Ansmann Racing

Reply
 
Thread Tools Display Modes
  #1  
Old 25-02-2012
Dandare's Avatar
Dandare Dandare is offline
Senior Member
 
Join Date: Dec 2010
Location: Suffolk
Posts: 914
Default Big Bores again, problems.

Getting tired of shocks, lol.

My problem is this, bearing in mind big bores have no bleed hole etc.

I fill body with oil, so it just creates a 'dome'

My aim is to set with minimal/zero rebound. I put the cap on only 1 turn or so & slowly push the shaft so almost fully compressed, do up the cap, what happens is i get 100% rebound, not good.
So i repeat, still 100% rebound, basically, the only way i'm able to reduce the amount of rebound is to remove oil.
For example, to get zero rebound i have to do the cap up with the oil 3-4mm below full but i then end up with lots of air inside & i can feel the air too ie, a few mm's of loose play with no damping.

I know the thread seals well even with the cap almost undone so i have to almost have the cap off in order to release oil.

I can't see how i can set these up without a) introducing air or b) having way too much rebound.

Any ideas appreciated
__________________
TLR 22 3.0/3300kv brushless Lunchbox/Helion 2wd sct/Dromida MT4.18/Orlandoo F-150/Mardave Cobra/Re-re Cat xls w/uprated tranny/Re-re Top Force/Carisma GT24R


http://www.norfolkbuggyclub.moonfruit.com/
Reply With Quote
  #2  
Old 25-02-2012
Appie53's Avatar
Appie53 Appie53 is offline
Member
 
Join Date: Feb 2012
Posts: 142
Default

At first Dandare I'am not an expert, been away for 15years

I saw a video about shocks during the Ifmar 2011 in Finland. Some guy's cut away the middle section from the rubber topcap, so there's only left a rubberring left to seal the shock topcap. I don't know this will help you, but the guy's from the video are enthousiastic about this!
Hope this will help
Reply With Quote
  #3  
Old 26-02-2012
Jaune's Avatar
Jaune Jaune is offline
Member
 
Join Date: Dec 2009
Location: Ottawa, Canada
Posts: 119
Default

Im using the 22 bladder in my teamC Bigbore. I drilled a small #57 hole the side of the cap and removed to o-ring. They are now so easy to build.
__________________
Jon Gagnon
TLR 22
Reply With Quote
  #4  
Old 26-02-2012
Cameo Cameo is offline
Member
 
Join Date: Jan 2008
Posts: 192
Default

Quote:
Originally Posted by Dandare View Post
Getting tired of shocks, lol.

My problem is this, bearing in mind big bores have no bleed hole etc.

I fill body with oil, so it just creates a 'dome'

My aim is to set with minimal/zero rebound. I put the cap on only 1 turn or so & slowly push the shaft so almost fully compressed, do up the cap, what happens is i get 100% rebound, not good.
So i repeat, still 100% rebound, basically, the only way i'm able to reduce the amount of rebound is to remove oil.
For example, to get zero rebound i have to do the cap up with the oil 3-4mm below full but i then end up with lots of air inside & i can feel the air too ie, a few mm's of loose play with no damping.

I know the thread seals well even with the cap almost undone so i have to almost have the cap off in order to release oil.

I can't see how i can set these up without a) introducing air or b) having way too much rebound.

Any ideas appreciated
Ok watch this
http://www.rccaraction.com/blog/2011...om-mike-truhe/

or/and
http://www.youtube.com/watch?v=pwtIRndovDI


I have no problems getting zero rebound or 2-3 mm (which is what I like) the 22 shocks are very similar to ours. we don't have bleed hole but you can see in the thread that there is a groove, well thats it.

Have the shaft pulled all the way out and oil level with the top.
Do the cap up until you feel it touch the Oring and back off just slightly the oil will start to bleed as you get close to the bottom.
Push in the shockshaft slowly to the desired rebound point and let it bleed.
Keep the shaft at that point and slowly screw the cap on tight.
Done.
__________________
I shop at www.tcmodels.net
Reply With Quote
  #5  
Old 13-03-2012
marcel's Avatar
marcel marcel is offline
Member
 
Join Date: Aug 2010
Posts: 160
Default

here a video of a teamc bigbore build.
http://www.youtube.com/watch?v=LnY-p...e_gdata_player
__________________
PR racing precirotate s1v2/sb401
Reply With Quote
  #6  
Old 15-03-2012
Dandare's Avatar
Dandare Dandare is offline
Senior Member
 
Join Date: Dec 2010
Location: Suffolk
Posts: 914
Default

Quote:
Originally Posted by marcel View Post
here a video of a teamc bigbore build.
http://www.youtube.com/watch?v=LnY-p...e_gdata_player
Just watched this whilst building my own big bore shocks, i'm following what he's doing to the tee but.. when he's bled the air by compressing the shaft/piston with the cap still loose he then almost fully compresses the shaft then does up the cap, job done. When i do EXACTLY the same thing ie, i start doing the cap up fully the shaft starts to come back out so that when the cap is fully tight i end up with 100% rebound when i only want 0-20% rebound.

I simply cannot get these set up to give the desired rebound without emptying out enough oil to prevent the shaft rebounding but this is when i end up with air in the shock & a resulting nasty feeling action ie, the feeling that there is an air pocket.

The problem seems to be the thread is so precise, almost self sealing that the when i start to do up the cap the air isn't able to escape from the thread thus causing the shaft to rebound as i do it up, i'm just unsure how to overcome it..
__________________
TLR 22 3.0/3300kv brushless Lunchbox/Helion 2wd sct/Dromida MT4.18/Orlandoo F-150/Mardave Cobra/Re-re Cat xls w/uprated tranny/Re-re Top Force/Carisma GT24R


http://www.norfolkbuggyclub.moonfruit.com/
Reply With Quote
  #7  
Old 15-03-2012
Appie53's Avatar
Appie53 Appie53 is offline
Member
 
Join Date: Feb 2012
Posts: 142
Default

Did you try getting no rebound by doing it with the shock horizontal?, works ok for me.
Reply With Quote
  #8  
Old 15-03-2012
marcel's Avatar
marcel marcel is offline
Member
 
Join Date: Aug 2010
Posts: 160
Default

at the movie you can see at 7.03 min a litle vertical opening in the treads of the shock body wear the top cap goes on. thats for bleeding. i know there were some versions that didnd have that. without it is hard to get zero rebound. i always hold the shock shaft when i close the top cap.
__________________
PR racing precirotate s1v2/sb401
Reply With Quote
  #9  
Old 15-03-2012
Dandare's Avatar
Dandare Dandare is offline
Senior Member
 
Join Date: Dec 2010
Location: Suffolk
Posts: 914
Default

Quote:
Originally Posted by marcel View Post
at the movie you can see at 7.03 min a litle vertical opening in the treads of the shock body wear the top cap goes on. thats for bleeding. i know there were some versions that didnd have that. without it is hard to get zero rebound. i always hold the shock shaft when i close the top cap.
There is certainly no groove of any description in the thread for bleeding, & if i try to hold the shock shaft i can feel it just wants to come out as i tighten the cap, when i let go i just opens to 100% rebound.

If i drilled a tiny bleed hole in the side of the cap would this help or just bugger up my shocks, lol ?
__________________
TLR 22 3.0/3300kv brushless Lunchbox/Helion 2wd sct/Dromida MT4.18/Orlandoo F-150/Mardave Cobra/Re-re Cat xls w/uprated tranny/Re-re Top Force/Carisma GT24R


http://www.norfolkbuggyclub.moonfruit.com/
Reply With Quote
  #10  
Old 16-03-2012
mof mof is offline
Senior Member
 
Join Date: Jul 2009
Posts: 307
Default

Try pressing the cap down a bit while slowly screwing it tight so that the cap does not compress tightly to the threads and lets the air bleed through. Helps with bleeding, at least for me.
Reply With Quote
  #11  
Old 16-03-2012
marcel's Avatar
marcel marcel is offline
Member
 
Join Date: Aug 2010
Posts: 160
Default

dont drill a hole in the side of the cap. cos the o ring has no efect anymore.
try to dremmel a groove in the shock body but carful not to damage the spot were the o ring closes the cap on the shock boddy.
hope you can folow my terible english
__________________
PR racing precirotate s1v2/sb401
Reply With Quote
  #12  
Old 16-03-2012
marcel's Avatar
marcel marcel is offline
Member
 
Join Date: Aug 2010
Posts: 160
Default

http://eazyrc.com/Shock-body-and-caps-big-bore-front
on this foto you can see on the left shock body the groof on top
__________________
PR racing precirotate s1v2/sb401
Reply With Quote
  #13  
Old 16-03-2012
Dandare's Avatar
Dandare Dandare is offline
Senior Member
 
Join Date: Dec 2010
Location: Suffolk
Posts: 914
Default

Quote:
Originally Posted by mof View Post
Try pressing the cap down a bit while slowly screwing it tight so that the cap does not compress tightly to the threads and lets the air bleed through. Helps with bleeding, at least for me.
Well, had another go tonight. Your method seems to have worked a treat, seems almost too simple to have not tried it already

Cheers bud

marcel: appreciate the suggestions you've given, interesting to see those bodies in the linky have the bleed grooves, i think maybe this may have been my next step. Cheers.

Done all 4 now, feel lovely
__________________
TLR 22 3.0/3300kv brushless Lunchbox/Helion 2wd sct/Dromida MT4.18/Orlandoo F-150/Mardave Cobra/Re-re Cat xls w/uprated tranny/Re-re Top Force/Carisma GT24R


http://www.norfolkbuggyclub.moonfruit.com/
Reply With Quote
  #14  
Old 17-03-2012
marcel's Avatar
marcel marcel is offline
Member
 
Join Date: Aug 2010
Posts: 160
Default

nice. have fun racing
__________________
PR racing precirotate s1v2/sb401
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:47 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
oOple.com