Bypass theory

Joined
Jan 16, 2023
Messages
21
One of the main goals of us joining this forum is to help educated the masses about performance off-road shock absorbers. We might not tell you all of the fancy tuning secrets but we love to share theory with the end users so that they may enhance their suspension experience. Diagrams shown are an older set of 2.5" x16" 4 tubes with staggered compression tubes and overlapping rebound, All current race style designs feature overlapping compression as well as overlapping rebound tube layouts.
 

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Joined
Jan 16, 2023
Messages
21
Whats the theorys behind running the tubes in parallel vs series?
we call it staggered vs overlapping, staggered is more old school, think of total fluid flow on a staggered set up you only have 1 tube to flow fluid through the amount of flow can max out quickly and fluid must flow thru the piston valving, if we open up the flow on the piston to allow the shaft speed to increase then we kill the ultimate bump zone potential, if we add more flow with tubes then the fluid does not need to flow through the piston and the bump stage can be more effective due to the amount of valving you can put on the piston to control fluid flow 1673969354831.jpeg
5 tube sexyness
 

84projectFORD

Active member
Joined
Apr 1, 2022
Messages
97
we call it staggered vs overlapping, staggered is more old school, think of total fluid flow on a staggered set up you only have 1 tube to flow fluid through the amount of flow can max out quickly and fluid must flow thru the piston valving, if we open up the flow on the piston to allow the shaft speed to increase then we kill the ultimate bump zone potential, if we add more flow with tubes then the fluid does not need to flow through the piston and the bump stage can be more effective due to the amount of valving you can put on the piston to control fluid flow View attachment 5721
5 tube sexyness

i guess im asking, "why choose staggared over overlapping or vise versa" because just like your pic above, those are overlapping but the demp pic has compression tubes in staggared? Whats the pros and cons of each?

EDIT: bypasses intrigue the hell out of me. there are so many ways to tune them or build them and im all about learning as much as i can on shocks. its amazing what properly tuned stuff will do on limited travel.
 
Joined
Jan 16, 2023
Messages
21
i guess im asking, "why choose staggared over overlapping or vise versa" because just like your pic above, those are overlapping but the demp pic has compression tubes in staggared? Whats the pros and cons of each?

EDIT: bypasses intrigue the hell out of me. there are so many ways to tune them or build them and im all about learning as much as i can on shocks. its amazing what properly tuned stuff will do on limited travel.
Always go for overlapping the tuning window is much greater, its all about flow if you don't have flow you will struggle to find a good compromise between good shaft speed and proper bump zone, staggered is early tech overlapping is new school, lots of flow potential is always better than limited flow potential, keep in mind tube size is also important a 3/4" tube will out flow a 1/2" tube. A good way to know if you have limited flow is if your tubes are wide open and it still feels harsh, normally you will have to pull valving from the piston to get rid of the harshness, when you do that you kill your bump zone, this is where the tuner and driver need to talk about going to a better shock package, B big boy 5 tube will have no compromise once set up to the vehicle, A staggered 3 tube will hit a tuning wall and you will need to decide what you want to go for speed or comfort
 

84projectFORD

Active member
Joined
Apr 1, 2022
Messages
97
Always go for overlapping the tuning window is much greater, its all about flow if you don't have flow you will struggle to find a good compromise between good shaft speed and proper bump zone, staggered is early tech overlapping is new school, lots of flow potential is always better than limited flow potential, keep in mind tube size is also important a 3/4" tube will out flow a 1/2" tube. A good way to know if you have limited flow is if your tubes are wide open and it still feels harsh, normally you will have to pull valving from the piston to get rid of the harshness, when you do that you kill your bump zone, this is where the tuner and driver need to talk about going to a better shock package, B big boy 5 tube will have no compromise once set up to the vehicle, A staggered 3 tube will hit a tuning wall and you will need to decide what you want to go for speed or comfort

what about on a high motion ratio, short shock setup like you see now a days with toyotas and the new ford bronco? something in teh 1.75 to 2.0 to 1 motion ratio on an 8" stroke shock, any benefit going to a 5 tube or are they even able to fit it? i think a 5 tube would still work on a 10" stroke, right?
 
Joined
Jan 16, 2023
Messages
21
what about on a high motion ratio, short shock setup like you see now a days with toyotas and the new ford bronco? something in teh 1.75 to 2.0 to 1 motion ratio on an 8" stroke shock, any benefit going to a 5 tube or are they even able to fit it? i think a 5 tube would still work on a 10" stroke, right?
when getting down to a 8" stroke a 3 tube is plenty on a 2.5" diameter, 10" would see some gains from an additional rebound tube but packaging gets very tight, there are advantages to having the additional stages but packaging generally doesn't allow for more than 3 tubes on a taco or new gen bronco or most bolt on a arm kits, generally we don't start doing 5 tubes until 12". We did just do a set of 3 compression single rebound 3.0x10 for all of the compression flow potential this application has quite a bit of compression damping in it and we needed all of the flow to allow for a good shaft speeds down towards droop to ride height. The motion ratio only dictates the force your trying to control its a multiplier more force more valving. Being able to control when the valving takes effect is the magic of the bypass zones or stages.
 

theycallmeWALLY

Administrator
Joined
Mar 30, 2022
Messages
825
So stoked you guys joined the forum.

Shock theory and chatter is just so helpful. I already spent a bunch of time reaching the spring theory today and well... I've never measured anything like that so I'll be doing that soon to see how far off I am.

 
Joined
Jan 16, 2023
Messages
21
So stoked you guys joined the forum.

Shock theory and chatter is just so helpful. I already spent a bunch of time reaching the spring theory today and well... I've never measured anything like that so I'll be doing that soon to see how far off I am.

Happy to help any way we can!
 
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