bell.cameron
Likes Dirt
Have people started receiving there stuff yet? ordered mine direct two weeks ago tomorrow but still nothing? I thought I read Express postage somewhere :/
S-works enduro 650b. I rode it again today at Lysterfield and it was still bottoming out at 280PSI on small - medium drops, which isn't ideal. Will Brad be able to help me out with volume spacers? Are they expensive? Easy to install?Sounds like a volume spacer could help you out quite a bit there. What bike is this on?
Harsh bottom out, or just using full travel?S-works enduro 650b. I rode it again today at Lysterfield and it was still bottoming out at 280PSI on small - medium drops, which isn't ideal. Will Brad be able to help me out with volume spacers? Are they expensive? Easy to install?
Not harsh, just using full travel in situations where it shouldn't have (or didn't used to).Harsh bottom out, or just using full travel?
Steve from Vorsprung suggested a medium to meI vote for medium.
Apart from the changes to spring curve, one issue I see would be that the smaller volume of air will heat up quicker.Steve from Vorsprung suggested a medium to me
They will send 3 sizes if you order them so you can go either way from medium
On this topic, what are the NEGATIVES, if any, of using spacers (volume reducers)
I think this is what you are looking for, however brief...http://www.pinkbike.com/news/sneak-peek-fox-prototype-air-shock.htmlI heard a rumour (from a bike mechanic in NZ) that the Corset design will be stock on all 2016 Fox shocks, can anyone confirm or deny this?
2.6:1 is pretty standard, definitely not considered high. If you're running 190psi you should have no issues, if you're running the standard volume Float sleeve you may want to experiment with adding air volume spacers too though.Question for Steve if he's around (or anyone else that's cluey with suspension).......how well would the corset go on a Commencal Meta AM?
My understanding is that it's got quite a high leverage ratio (about 2.6:1. 150mm travel, 57mm stroke). I'm currently running about 190psi in a standard volume Float CTD so i'd say it will be skirting the upper end of the air pressure capabilities.
3:1 is fairly high for trailbikes yes. The overall leverage ratio dictates the air pressures you'll have to run at a given weight, whereas the leverage rate curve is what dictates how much ramp up you'll need. In the case of the Enduro, it requires fairly strong ramp-up from the shock because the ending stroke is quite digressive, and because the small diameter Corset runs a slightly larger volume than the large diameter one in the same size (the large diameter one is constrained in that regard), you'll want to run a larger volume spacer (it is also possible to add volume spacers to the outside of the small diameter sleeves using 40.00 x 2.00mm o-rings, make sure they're only over the positive chamber part though).I can't seem to find published figures on the Enduro's leverage ratio, is it just the travel divided by the shock stroke? If this is the case it has a leverage ration of about 3:1. Not knowing anything about suspension, is this considered high or low?
I've read that the Enduro is very linear in its leverage, perhaps this would explain why it's having so many issues ramping up with the Corset, although reading Steve's post it was suggested that the Corset wouldn't change this over the Fox air sleeve characteristics (which weren't a problem).
I'm hoping that just going up and up with the volume spacers will eventually fix the problem.
If all the air is dumped from the sleeve rapidly, the shock will compress itself (a la a "stuck down" shock) as the piston passes the equalisation port faster than the air pressure can actually equalise, which results in the negative chamber remaining pressurised and the experience you had with it blowing off. To prevent this, release air slowly using a shock pump. A short distance into the travel, you'll hear a faint clicking noise, this is the air equalising. If it gets too far into the travel, you'll need to either extend the shock by pumping it back up a bit, or if it's still in the bike, forcibly extending the suspension slightly.Just a heads up to those who might be removing the Corset after its been pressurised: even letting all air out of the valve before unscrewing, I got a very loud 'bang' as the Corset rocketed away from the shock body! Must be the air trapped in the negative air chamber or something. I wonder what would happen if it was removed using the other method, ie removing the retainer ring and then sliding off the outer sleeve before the inner sleeve? I'm sure there would still be a rapid depressurisation at some point?
Wondering what size volume spacer to start with, I'm tempted to go with the thickest one to maximise ramp up, which will hopefully minimise the amount of air I have to put in it to stop it bottoming. Very soon I might have air shock perfection!
Thanks Steve, worked a treat and no explosion with parts ricocheting off the fence this time!If all the air is dumped from the sleeve rapidly, the shock will compress itself (a la a "stuck down" shock) as the piston passes the equalisation port faster than the air pressure can actually equalise, which results in the negative chamber remaining pressurised and the experience you had with it blowing off. To prevent this, release air slowly using a shock pump. A short distance into the travel, you'll hear a faint clicking noise, this is the air equalising. If it gets too far into the travel, you'll need to either extend the shock by pumping it back up a bit, or if it's still in the bike, forcibly extending the suspension slightly.