shock set up , rebound , bladder etc

[shaun m]

hi are there any tips for setting up shocks on 1/10th buggys etc

rebound ::: , what track conditions do you have %100 or run none ??

piston size / holes ::: again do you just stick to one size , and just change oil weights ??

bladder ::: also do you run with or without the bladder , and again when and what conditions etc ..

sorry if these seem stupid questions , but i want to get my head round a few things ..

[s22jgs]

Rebound is one i dont fully understand myself, so i just build all mine with as little as i possibly can.

Pistons, it depends how seriously you take your racing i guess. You can settle one a set you like and just adjust your oil, but there is more to it than that. The more holes you have in your pistons, the more "pack" there is. Basically this is disruption to the sitting oil as the piston suddenly moves. THe more pack there is, the more resistance there in on a sudden impact. For example, if you have 2 cars, one with 2 hole pistons in, and another with 4 hole pistons in and drop them both from the same height, the one with 2 holes will compress easier and land softer than the one with 4 holes. I would say its more a tuning aid for the track you are on. Less pack for smaller jumps, more for those where ure car is going to be landing harder.

Bladders, i hate them personally. I prefer the bleed screw type shocks. But i cant tell you the pros and cons of each, other than bleed screw are easier and quicker to build for me.

Im sure if i have left anything out or got anythin wrong then someone wil add to this

[charlie2]

surely the car with 4 holes in the piston will be softer/compress faster due to the oil passing through the piston easier due to less restriction in oil flow with the extra holes?

[s22jgs]

its something to do with the turbulence that the oil flow creates. less holes less turbulence.

Im sure someone can clear it up, i could have things wrong way round... there are other threads on here about it too

[Robby]

Originally Posted by shaun m

hi are there any tips for setting up shocks on 1/10th buggys etc

rebound ::: , what track conditions do you have %100 or run none ??

piston size / holes ::: again do you just stick to one size , and just change oil weights ??

bladder ::: also do you run with or without the bladder , and again when and what conditions etc ..

sorry if these seem stupid questions , but i want to get my head round a few things ..

rebound - never, ever, ever run any rebound. rebound is a result of overfilling the shocks (too much oil), and if you try to build your shocks with rebound the first jump you go over it will blow the excess oil out of your shocks (unevenly)

pistons - generally, I find the pistons that work for me and then only fine tune via oils for different tracks

bladders - personally, no, I prefer emulsion style shocks. it's easier to be consistent, in building/bleeding them and in their performance

[dirkdiggler]

Have a listen to this then about never never rebound.http://www.youtube.com/watch?v=HNJy7kreK90

[Howler]

Originally Posted by Robby

rebound - never, ever, ever run any rebound. rebound is a result of overfilling the shocks (too much oil), and if you try to build your shocks with rebound the first jump you go over it will blow the excess oil out of your shocks (unevenly)

I think you're confusing rebound with hydraulic lock.

[bigred5765]

heres all you need to know CLICKY

[RogerM]

More holes doesn't mean anything on it's own in terms of pack. This was all covered on another thread recently.

A combination of hole diameter and TOTAL hole area (of all holes) will give you the pack balance changes ... then there is oil to consider too ..

[Robby]

Originally Posted by Howler

I think you're confusing rebound with hydraulic lock.

nope

Originally Posted by dirkdiggler

Have a listen to this then about never never rebound.http://www.youtube.com/watch?v=HNJy7kreK90

I didn't know we were talking about 1/8th scale, vented shocks, with foam compensators, or discussing the "buildup of rebound during a run" ---- instead of 1/10th scale, without vented shock caps, without foam compensators, and without pre-setting rebound ?????

http://youtu.be/eWBAKC-c1s4

[SimonW]

I've always set my shocks (dampers) with the shock shaft fully compressed, whatever manufacturer. That way the shock will pull in any necessary air to balance out between fully compressed and fully extended so as little back pressure as possible is exerted on the shaft/piston so the spring is holding up the car not built up air pressure in the shock body. At ride height the shock should be roughly equal (pressure/vacuum theoretically). HTH's

[HOTSHOT III]

Originally Posted by RogerM

More holes doesn't mean anything on it's own in terms of pack. This was all covered on another thread recently.

A combination of hole diameter and TOTAL hole area (of all holes) will give you the pack balance changes ... then there is oil to consider too ..

Although i've never experimented with different shock pistons I must say I agree with this answer, it seems logical.

If anyone wants to find out the total area of all the holes in their pistons the formula for the area of a circle is pi (about 3.142) x hole radius x hole radius (the radius of a circle is half the diameter).

For example the area of a 10mm circle = (3.142 x 5 x 5) = 78.5 square millimetres approx.

Don't forget to multiply your answer by the appropriate number of holes.

Can you post up the link to the thread you mentioned?

[single cab]

I have very long time behinde me , but am new to the 2wd buggy . I'm totaly rookie at the shock setup . The stock setup was 40w oil and 2 hole pistons but i have put 3 hole pistons in the rear... I's that good or not ? My thing was the rear were more in contact to the ground and the shocks must moor in act.