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Originally Posted by TheNick,Apr 16 2010, 11:09 AM
Thats impossible. Changing bleed is going to effect HS damping no matter what you do unless you run the Regressive Piston from Penske. http://www.penskeshocks.com/files/racecar.pdf
HS Damping doesn't start until the bleed valve chokes off and the oil bypasses it to move through the shims/HS valves. The piston has to move through the low speed valve before it gets to the high speed - if you run less bleed/more force at low speed, then the high speed force is going to be additive on top of that.
Urm... impossible? Are you sure about that Nick?
Look at page 2 (rear shocks) of alvanderp's Penskes:
There's a small increase in highspeed rebound, but it's a pretty small increase relative to the change in low-speed rebound. Basically it shows the adjustment moving the knee...
Originally Posted by angryfist,Apr 16 2010, 09:50 AM
I personally like a digressive setup.
You would like a digressive setup for both comp $ rebound?
I think a digressive rebound and linear comp would be ideal. I don't understand why the compression damping should fall off but I see an advantage for it on rebound.
You would like a digressive setup for both comp $ rebound?
I think a digressive rebound and linear comp would be ideal. I don't understand why the compression damping should fall off but I see an advantage for it on rebound.
Like Nick said, I am basically running a setup as explained by DG.
Originally Posted by glagola1,Mar 31 2010, 07:47 AM
For reference, here is a dyno plot from my front shocks. The rears look similar. Rebound is on the bottom. I've been running the shocks at full compression and at click 3 out of 6 for rebound. Click 4 proved to be too stiff at the bumpy lot in Texas but was fine for the smooth lot in Dixie.
Looking at the Moton plot here it appears that the compression adjustment changes the pre-load of a shim stack in the canister. Is that how the Moton adjuster works in this case? If it was a bleed adjustment the curve would move primarily in rate (left/right).
There's a small increase in highspeed rebound, but it's a pretty small increase relative to the change in low-speed rebound. Basically it shows the adjustment moving the knee...
James Yom
Yes I'm sure.
Also, when making a big adjustment in high or low speed, the change will affect the other in a small percentage. As an example, the high speed is set at (+4) and the low speed at (-6). Now you want to set the low speed to (-2), this will also increase a percentage of the high speed force figure. By dropping the high speed from (+4) to (+3) would compensate for this low speed change so the overall "damper curve" would remain intact.
- Penske Tech Manual page 16
You can also see on Page 27 that bleed adjustments do change the high speed forces.
There was more discussion in here about revalves then the bilstein thread so I figured I would post in here.
My first valve on the bilsteins, I'm pretty sure I completely screwed up the rebound
I'm on my second try and instead of working off of what I had I tried something completely different and it's worse than the above, far too little compression and rebound. I'm sure this is going to keep going this way until I try more goofy ways of valving these things.
This is how I setup the shims, thanks to my wife I'm organized somewhat
04-16-2010, 10:56 AM
