valving triple by-pass

[BNR_Motorsports]

i have a deaver race pack with 2.5 triple by-pass saws on an f-150 and it rides a little stiff....can i valve for that or are my shocks just a little cold and need to warm up???

[SPONSOR]

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[Random Thoughts Racing]

Did you just put the deavers on and now the truck feels stiffer? Assuming you are not packing and that you have opened up your compression tubes all the way and still feeling to stiff then you are in for a revalve.

[Josh_K]

You need to go inside the shock and move the shims around or just replace them with thicker or thinner shims.

Opening up by-pass tubes past 2 or 3 turns only increases free bleed and you lose damping. Basically your shock gets smaller as your by-pass tubes open. By-pass tube for the most part are the lazy mans way of tuning.

[Bulldozer]

You need to go inside the shock and move the shims around or just replace them with thicker or thinner shims.

Opening up by-pass tubes past 2 or 3 turns only increases free bleed and you lose damping. Basically your shock gets smaller as your by-pass tubes open. By-pass tube for the most part are the lazy mans way of tuning.

Seems to me that if it is riding stiff the idea is that you WANT to lose some damping.

[Samco Fab]

You need to go inside the shock and move the shims around or just replace them with thicker or thinner shims.

Opening up by-pass tubes past 2 or 3 turns only increases free bleed and you lose damping. Basically your shock gets smaller as your by-pass tubes open. By-pass tube for the most part are the lazy mans way of tuning.

If you open a bypass tube beyond 3 turns, it is still a one way check valve and will still only flow one way. Most of the flow change happens at the first few turns and the change decreases as you go out (on the King and Fox valves I have worked on) but they are not free bleed or orfice type valving.

By pass tubes are position sensitive valving, not just external adjusters. Often you want different valving at different spots in the suspension travel, on both compression and rebound. A bypass valve does not make your shock smaller, it adds oil volume and surface area to increase cooling.

Shock temp in my experience does not change dampening a huge amount unless you get them way hot and smoke the oil. Remember if you make bypass adjustments, write them down so you can go back, rebound can also change ride quality and if you cant make it ride good enough with bypass tube adjustment, you have to go in and change the piston valving. If you soften up your piston too much, you will loose bottom out control if you dont have an air bump. There are many threads on this subject that you can refrence from to gain knowledge.

[Beat98TJ]

If you open a bypass tube beyond 3 turns, it is still a one way check valve and will still only flow one way. Most of the flow change happens at the first few turns and the change decreases as you go out (on the King and Fox valves I have worked on) but they are not free bleed or orfice type valving.

I would disagree with this statement. The Fox and King bypasses I have worked on, the SAW's according to a friend that was an engineer there years back, as well as my Rancho lightning rods all have adjustable orifices. There is a check valve and the adjuster limits the amount that the adjuster can open. That is to say it adjusts the maximum cross sectional flow are of the bypass tube. The spring in the adjuster is so soft that no metering is done.

It has been a few years since I worked with Fox's or Kings, and I have heard that somebody is metering the fluid in the bypass tube, perhaps with small deflective discs. I have not seen it in person though. The Blackhawk does meter the fluid through the bypass adjusters with a spring with adjustable blowoff.

[jesusgatos]

RICOR is taking a little bit different approach to bypass valving. Just launched a new site with some info about their hi-flow bypass tube assemblies here. Click on the 'hi-flow bypass tube assemblies' icon and then click on 'read more' at the bottom of the page.

[Bulldozer]

RICOR is taking a little bit different approach to bypass valving. Just launched a new site with some info about their hi-flow bypass tube assemblies here. Click on the 'hi-flow bypass tube assemblies' icon and then click on 'read more' at the bottom of the page.

Sorry this is off topic...

RICOR says they flow ALL (or at least capable of flowing all) of the shock fluid through the bypass tubes, seems like it would create a lot of heat compared to a conventional bypass?

They look like awesome shocks though! Something revolutionary.

[Beat98TJ]

Sorry this is off topic...

RICOR says they flow ALL (or at least capable of flowing all) of the shock fluid through the bypass tubes, seems like it would create a lot of heat compared to a conventional bypass?

They look like awesome shocks though! Something revolutionary.

Damping the same amount of force, creates the same amount of heat (essentially) whether it goes thru the working piston or the bypasses.

That is to say that the same amount of energy is being disappated.

[Bulldozer]

That is to say that the same amount of energy is being disappated.

That's what I was getting at...

the tubes seem like the would heat up a lot if they are flowing 100% of the shock fluid, and they have less surface area then the main shock body.

Might not make a difference though :-?