I'll give it a shot!
I don't understand the double flutter. Down South gave me the stack. DC Shocks put a flutter into the bypasses, 4.3.2 with 20s on the small shims. At this point I had 700# coils and it was pillow soft over everything and the bypasses still did a decent job of soaking up the big stuff.What's the science behind the double flutter on yours? Looks kinda like something Accutune would do.
You might try just the 1.8 before the fulcrum shim to reduce the crack pressure and eliminate the 1.6.
1.800 x .010
.800 x .008
1.600 x .010
.800 x .008
1.60 x .010
1.425 x .010
I think reducing the crack pressure might get the oil moving through the piston sooner and soften up the initial hit.
One guy suggested I try a flutter in the bypass for the same reason. Said the oil in the tube and the poppet has mass, so it helps to crack open the valving on the piston sooner so it doesn't have to get all of that oil moving and open the valve.
Not sure how I feel about a flutter in the bypass, but I might try it.
This is what I was thinking. Those are very light stacks for a full size truck.Picture of assembled piston/valving in the CO?
With that light of valving it should not be harsh. Thinking you have other issues. Something like that would normally run a .015 on comp and .008reb. With 2 bleeds open and a flutter stack, it should be a sloppy pig.
I think you should still look at the springs. and you can also try a flutter in the bypasses.I don't have a picture of the coilover, but the valving specs are up towards the top. It's pretty soft, but I wouldn't say sloppy. I just have no idea what other issues there could be unless it's in the bypass.
Well I took my flutter out. But some guys think a flutter is ok in bypasses to keep it soft overt the little stuff so that why I asked your opinion. Thank you for explainingIf it's too stiff you need to open up the tubes. Putting a flutter in it really defeats the purpose of the bump zone. Low flow pistons will mask lack of valving but will also create pressure spikes like rate plates. Harsh for no good reason.
Here's the coilover valving:Or your comp stack is to close to the top out washer making it act like a rate plate. Why photos tell a lot.
Never flutter a BP.
This is good information thank you for this. I had to go back and look at my stack sizes to make sure I wasn't getting too drastic.Ok, now that I have a real keyboard.
With your current stack you have .095 of space between the face shim and the top out washer.
With a .015 stack and a .093 spacer like usual, you come up with .165 between the face shim and the plate.
This is where your issues are coming in. Space it up. I have a feeling when you do this it will become to "soft". If you still feel the need for some high speed control after that, throw a .015 X 1.8 on top of the stack.
Your springs are also suspect, but not causing the high speed harshness.