ahicks
TY 4 Stroke Master
I don't know if you got into REX's notes or not. In the first one, he describes the valve stack he's gone with. Maybe we could use it as an example here?
17x203 End of second rebound stage
26x254 .
26x254 .
26x254 .
26x254 .
26x254 .
26x254 Second rebound stage (here up to the top)
16x114 Space before second rebound stage kicks in
26x254 First stage rebound
1 slit piston bypass port
30x203 First stage compression
15x152 Space before second compression stage kicks in
30x203 Second compression stage
30x203 .
30x203 .
26x114 Final second stage component & space before 3rd stage
18x114 Space before 3rd stage
Hard stop Hard stop as the 3rd stag
Go down through that stack to the piston, what he refers to as "1 slit piston bypass port". The first stage in that compression stack consists of the next 2 washers. The 30x203 (30mm x .203 mm) and the 15x152. The rest of it we aren't concerned with!
The stiffness while we're in the stutters is controlled by the thickness of the 30x203 and the amount of room it has to deflect (bend) prior to bumping into the second stage (the next 30x203), which is controlled by the diameter and thickness of the 15x152. A smaller diameter, or thicker washer (or another/2nd washer?) here would allow more room for the 30x203 to deflect? A second set of identically sized shims might do the same thing?
This is where it gets tricky. You sometimes have to try a couple different things to accomplish what you're trying to do.
In any case, YOU are the one he's trying to satisfy. You're in the drivers seat. There is no right or wrong to it! NEVER! It's ALWAYS a case of does it work, or doesn't it - and you are the one that determines that! There's nothing wrong with your senses or the way you're driving it. If you are saying "too much feedback" you cannot be wrong. He has NO BASIS for stating the stack is correct.....period! If he's not able to be flexible with this setup, I have to question his competency or willingness to get it right. You say he's competent.......
The stack section we're talking about is actually the high speed section. To understand, all the tiny little chatter bumps force the piston to move at a much higher frequncy than say a g-out or other big hit might? Shock piston speed has nothing to do with sled speed (for our purposes). The piston is moving faster in the high speed section, and generally not moving very far?
On your sled, it's over damped in this section. That vibration coming up through the bars is caused by your compression damping adjustment being set too high, a mis-tuned initial stage in a multi stage stack, or a stack that does not consist of multi stages. I don't know of any other options?
17x203 End of second rebound stage
26x254 .
26x254 .
26x254 .
26x254 .
26x254 .
26x254 Second rebound stage (here up to the top)
16x114 Space before second rebound stage kicks in
26x254 First stage rebound
1 slit piston bypass port
30x203 First stage compression
15x152 Space before second compression stage kicks in
30x203 Second compression stage
30x203 .
30x203 .
26x114 Final second stage component & space before 3rd stage
18x114 Space before 3rd stage
Hard stop Hard stop as the 3rd stag
Go down through that stack to the piston, what he refers to as "1 slit piston bypass port". The first stage in that compression stack consists of the next 2 washers. The 30x203 (30mm x .203 mm) and the 15x152. The rest of it we aren't concerned with!
The stiffness while we're in the stutters is controlled by the thickness of the 30x203 and the amount of room it has to deflect (bend) prior to bumping into the second stage (the next 30x203), which is controlled by the diameter and thickness of the 15x152. A smaller diameter, or thicker washer (or another/2nd washer?) here would allow more room for the 30x203 to deflect? A second set of identically sized shims might do the same thing?
This is where it gets tricky. You sometimes have to try a couple different things to accomplish what you're trying to do.
In any case, YOU are the one he's trying to satisfy. You're in the drivers seat. There is no right or wrong to it! NEVER! It's ALWAYS a case of does it work, or doesn't it - and you are the one that determines that! There's nothing wrong with your senses or the way you're driving it. If you are saying "too much feedback" you cannot be wrong. He has NO BASIS for stating the stack is correct.....period! If he's not able to be flexible with this setup, I have to question his competency or willingness to get it right. You say he's competent.......
The stack section we're talking about is actually the high speed section. To understand, all the tiny little chatter bumps force the piston to move at a much higher frequncy than say a g-out or other big hit might? Shock piston speed has nothing to do with sled speed (for our purposes). The piston is moving faster in the high speed section, and generally not moving very far?
On your sled, it's over damped in this section. That vibration coming up through the bars is caused by your compression damping adjustment being set too high, a mis-tuned initial stage in a multi stage stack, or a stack that does not consist of multi stages. I don't know of any other options?
