A place for airshox data.

[Weasel]

We run the Walkers and tune by driving and also by a shock dyno we built and yeah you can't really spreadsheet it. Have to tune by driver and everyone like something different.

Early when we started using these AS (three years ago) we tried running low oil levels and more nitrogen and had some odd shock behavior due to what we guessed is that there was not enough oil for the piston to travel in.

As shown above in the picture, that oil level would seem to be the minimum you would want to run, less and would your damping suffer at some point?

No I doubt Fox would ship with no enough oil.

 

[Weasel]

I bet the shock body is longer the the shaft travel, allowing some room at the top of the shaft at full compression that you can vary the oil/N amounts?

That would keep your piston in the oil medium throughout the travel.

 

[XJ_ranger]

I bet the shock body is longer the the shaft travel, allowing some room at the top of the shaft at full compression that you can vary the oil/N amounts?

That would keep your piston in the oil medium throughout the travel.

Id put money on that...

ive noticed 'weird' behavior from the shocks at anything over about 220psi? - but that was back when Ron was running Fox 2.0's in the front of the MJuggy...
I dont remember the exact pressure we started noticing the differences, but the Airs like to be at 'lower' pressures...

 

[Weasel]

And the relationship between the spring rate and oil level might be linear but I'd bet the rate of change is pretty large as you only have probably 1" to vary the oil/N levels, so 10cc would give a fairly large change. We don't come close to running those kinds of pressures in the baja rig.

 

[Paul S]

Well, it's been just over 1 year since I first went to airs & I've finally get 'um figured out.
In the end I did a 180 from everything I had been trying to make work.

I found that the single bleed piston in the rear (at least in my light weight car) simply couldn't flow enough oil fast enough & therefore didn't allow me to run enough oil. On my last run of last season I tried duel bleed hole pistons
with much more oil & it worked much better, but by then I was totally burnt on tuning the 2.0's.

I switched to 2.5's in the back. I first tried them with near stock oil & single bleed 'shock' pistons (as opposed to the single bleed bump stop pistons that I run up front). This was way too harsh. I switchwed them out for duel bleed pistons & it smoothed right out.
The benchmark to meet in our group was Dave's rear coilovers with air bumps & mine is now equally smooth/fast.

The front 2.5's have been great since day 1, but I figured out how to make them substantially better this weekend. Dave's going to do the same with his, but since he's running the KOH LCQ, he might want to keep this little mod underwraps for now:shhh:

Paul