Would be good to hear an explanation on "PACK". Its not obvious what it is. Something to do with the increase in damping as the fluid pressure increases whilst aeration reduces??
Pack can be compared to wading in the water vs. trying to run in water: it gets progressively harder the faster you try to go. So in the case of the piston, the resistance to slow movements (e.g. roll in a corner) is small but the shock really resists fast movements like landing a high jump. The curve of this progression can be adjusted with the hole sizes and oil viscocity. For example, using smaller holes and a lower viscocity oil can get you a similar low-speed damping but more high-speed damping compared to larger holes with thicker oil. You could say ”pack” is just a short word for high-speed damping.
@@Glocktologist Thats an excellent explanation. Thank you. Presumably the reason why larger bore dampers are able to provide more pack is because you are displacing more fluid volume and therefore increases the velocity of fluid in the orifice hole - a similar effect to reducing the hole size.
@@Glocktologist although you’d think you could just further reduce the orifice size instead of increasing the damper bore. I do wonder if there’s an aspect relating to the aeration. Larger fluid volume mean less aeration effect.
Excellent. Very useful video as always.
Would be good to hear an explanation on "PACK". Its not obvious what it is. Something to do with the increase in damping as the fluid pressure increases whilst aeration reduces??
Pack can be compared to wading in the water vs. trying to run in water: it gets progressively harder the faster you try to go.
So in the case of the piston, the resistance to slow movements (e.g. roll in a corner) is small but the shock really resists fast movements like landing a high jump.
The curve of this progression can be adjusted with the hole sizes and oil viscocity. For example, using smaller holes and a lower viscocity oil can get you a similar low-speed damping but more high-speed damping compared to larger holes with thicker oil.
You could say ”pack” is just a short word for high-speed damping.
@@Glocktologist Thats an excellent explanation. Thank you. Presumably the reason why larger bore dampers are able to provide more pack is because you are displacing more fluid volume and therefore increases the velocity of fluid in the orifice hole - a similar effect to reducing the hole size.
@-1-2-1- That’s exactly how I also understand the effect of a large bore.
@@Glocktologist although you’d think you could just further reduce the orifice size instead of increasing the damper bore. I do wonder if there’s an aspect relating to the aeration. Larger fluid volume mean less aeration effect.
low frequency springs in my case are too slow. I change my rear low frequency for stadard springs.
Thank you ……..😎🦾