Tearing apart Bypass Shocks to see how they work...

Hey guys,
Bypass shocks are new to me. So in this video I take you along as I take one of these apart to see exactly how they work.
These are Locked Offroad 2.5" Bypass shocks with 18" travel.
Here is the shared folder if you need anything in there.
drive.google.com/drive/folder...
Happy New Year!

[@tetrakite]

Very informative vid, I wasn't aware of this bypass technology, I find these bypasses very close to the end of the travel and I don't really understand why… their effect is then much more like hydraulic stoppers ? Interesting. Thank you for sharing, please continue even if you don't have the viewers that you deserve. Happy new year from France !

[@DougBugBuilder]

I agree with you 100%. The bypasses on this shock I think are too far back. I might grind them out at some point and move them farther forward to see how much better that is. Say hello to France for me. Happy New Year.

[@Kikinahm]

Can you install with the back of the bug body, stock?

[@stephs1571]

Great video!! Thank you for showing the inside and explaining so clearly!

[@DougBugBuilder]

Your welcome, thanks for the comment.

[@davidmays3333]

Great job Doug. Happy New Year!!

[@DougBugBuilder]

Thanks, you too!

[@modotvideo]

Thanks for the education i never knew how those remote Reservoir shocks worked. Great info

[@DougBugBuilder]

Glad you liked it. Thanks for the comment.

[@kenanderson2216]

Well done. I have 3" 3X bypasses on my truck and now I know exactly how they work. Thanks! I recommend Kings. Those could be better built it seems.

[@timvandermeulen7265]

Great video thanks for sharing. I can say I now know how bypass shocks work! Also makes sense why you hear them click also!

[@DougBugBuilder]

Right on! Thanks for the comment!

[@tomcelica1030]

Rad video! I now have a better understanding of how bypass shocks work. So awesome. I wish I would have been this knowledge driven in school! Why do we gain our wisdom so late in life? It almost seems unfair! Thx Doug

[@DougBugBuilder]

In school we have to learn things we're not interested in. But later on we get to learn about things we are interested in. And it makes a big difference! Thanks for the deep thoughts. ✌

[@MarcelTM]

Thanks for the explanations... it became clear for me 🤪.. Nice job by the way !!!

[@DougBugBuilder]

Thanks!

[@MagPel1]

Yeah, you don't want to scratch the shaft or spill your fluids unintentionally 😁 Great vid as always 👍

[@DougBugBuilder]

Oh boy...🤣 Thanks!

[@tp7886]

Fantastic video! Thank you so much!

[@DougBugBuilder]

Glad you liked it, Thanks for the comment.

[@tptrsn]

SUCH an awesome video, thank you!!! I've wondered a lot how bypass shocks worked, and now I finally really know. :) The only bad part is now I will have to buy some. Lol

[@DougBugBuilder]

Knowledge is power...... and expensive. 😁

[@tptrsn]

@@DougBugBuilder Truth!! Lol

[@guncalinhosiqueira8547]

Very cool this explanation 👍👏👏💯💯

[@DougBugBuilder]

Thanks Buddy!

[@JDawgBuilds]

Man I would of really loved your video a couple years ago! I basically did the same testing as you and completely took mine apart. I tuned my old 2.5x16" smoothies on the rear and 2.5x8" coilovers on the front with different valve stacks, mixing shims and using flutters. That was a learning big curve too, but I had to learn how bypasses worked the same way you did it. I also have locked off road 2.5x16" bypasses on my rear now. They are close enough to me I can just call him and we met up in person lol. I have one of their first batch of bumps they sold as a company all around. Such a great company.

[@DougBugBuilder]

Wow, that's cool you could get in person service. Riley has been super helpful over the phone with me. The support is great. Sounds like you go it dialed. 👍

[@JDawgBuilds]

@@DougBugBuilder lol yeah I met with Riley twice! Saving up for some coilovers and all my suspension will be locked off road. =p

[@htarpaulin6793]

Dats super brilliant!!!😁

[@DJ-yp4kc]

Shocks are a Science nowadays. I can remember seeing them come on the off road scene...and thinking DAMN!! That's the Main reason they go so fast today, controlling the rebound and compression. Hey I didn't see Doug helping?? LOL Good Job!!

[@DougBugBuilder]

Ya know I had a good shot of them (Doug and Kevin) wrestling in the background and I totally forget to put it in the video. Although this video was already pretty long.

[@nagadsby9413]

Excellent.

[@waynenocton]

Nice explanation thank you.

[@DougBugBuilder]

Your welcome, thanks for the comment.

[@tylerddh]

Pretty neat!

[@DougBugBuilder]

Thanks!

[@jimhowell4937]

Good stuff. I'll add that the valve disc's at the main piston, and the bypass valves work together much like stacked coil springs work together to increase the spring rate in a linear rate the valving becomes infinite in it's dampening adjustment's. Good stuff, keep it up.

[@DougBugBuilder]

If it's infinite then I'll never be able to say it's beyond the shocks abilities. 🤣

[@jimhowell4937]

Maybe "finite" would have been a better word.

[@BrokeWrench]

The oil goes through the bypasses until the flow in the orifice reaches the speed of sound (in the oil) then it doesn't allow oil through any faster no matter how much pressure builds up. Once the bypasses saturate and causes pressure to build up the oil is forced through the valve body and its shim stacks

[@Glens1965]

Great Vid!!!!

[@DougBugBuilder]

Thanks!

[@antiblingdesigns]

Because knowing is half the battle 👽👍

[@DougBugBuilder]

GI Joe! 👍

[@kevinhamling1963]

He man, Kevin here from Australia. Great video it makes sense now how these shocks work 10/10 . So whats installed for 2021 i know this project has to be done but in what order. You should do a what's coming in 2021 video Anyhoo happy New year to you and your family stay safe and stay well this virus is not finished with us just yet. And Happy New year to all your subscribers as well i enjoy reading all responses. ✌ Peace everyone.

[@DougBugBuilder]

Hello Kevin, Happy New Year, I hope 2021 is great for you. After I finish the rear suspension I'll move on to the engine, cockpit interior, fiberglass front end, then final welding and paint. I hope it goes that easy. 🤣

[@kevinhamling1963]

@@DougBugBuilder ✌

[@TheEZGZ]

The design is the result of Ink Pens, many napkins, Much Pizza and lot's of alcohol. Not necessarily in that order.. Great presentation Mike!

[@DougBugBuilder]

Hey EZGZ! Great to hear from you. Hope you're doing well.

[@kevinsoui7947]

It’s kind of like ABS systems I guess when it’s engaged. He would to absorb shocks with a lot of energy and able to break it down into smaller energy.

[@jamesmerkel9442]

I worked out a new setup for jeeps w/a teeter totter over axle set up custom deal which geometry change of lifting would not mess w/easy bolt on product. I also worked out a way 1 spring could b used & reused factory setup lift to 6" range by hving birches allow extra spring to b turned into birch location. Nice thing about this is u don't need a new spring in lift kits any more just unturn the extra spring below birch back up into use range. Back to teeter totter set up this give every1 a TRUE dual rate spring bc 2 diff springs even in from factory basic 2" lift set up. Best poss ride quality is had by adjustment on shock hopeful from dash where u actually will use it & hving 2 diff TRUE dual rate springs.

[@Haunterforlife]

Great video. I’m currently building a similar build but using a Manx body. Love watching your videos. I’m currently researching coil overs and bypasses for my build and curious what sold you on using “Locked”?

[@DougBugBuilder]

I would love to build a Manx style buggy, that'll be a cool video. I went with Locked because the pricing was good and customer service is great. It's a smaller company and really easy to reach out to them with questions.

[@jamesmerkel9442]

Has any1 made a double allen lock nut U seat the small allen into main allen just as a keeper lock so u don't hve to kill the nut down tight or more important coming off. They get used in smaller sizes on engines & stripping or breaking small nuts can happen. So if they make them 2 in 1 no need to crank! down on them to fasten.

[@nesertema4583]

great explanation, thanks! compared to other "blah-blah look at the shiny expensive dampers" videos. instead of grabbing the piggyback cap by pliers you could simply pressurize the chamber (after removing retention clip of course) and it would pop up?

[@DougBugBuilder]

Yeah I guess that would be much better then grabbing them with pliers. 🤷‍♂️ Thanks for the tip.

[@timvandermeulen7265]

I am building a new Baja and am considering bypass shocks on the rear to work with the stock torsion springs(heavier spring installed). By passes seem to be a good way to give me some tune-ability.

[@DougBugBuilder]

That would be nice, with the torsion bar you wouldn't need a coil carrier.

[@timvandermeulen7265]

@@DougBugBuilder yes that’s what I was thinking! That going fast over bumpy terrain sure costs a lot of money!

[@jamesmerkel9442]

heater 4:32/4:33 am running out 1st tank of 4 grill 20lbs tanks we filled. & it ran out 4:34 am w/1/2 a sec diff between stove^ & microwave time. The computer time matches micro more than stove but is closer to stove^ time in terms of prt of a min division.

[@gettinbentfabrication9137]

I ran a hydraulic shop for 3 years you don’t ever want to Pressurize with air if you do it could make that sleeve come and slams that clip ring and that ring could fly out and then you have a Missile best bet to do is pull up on the shaft

[@DougBugBuilder]

That makes sense, thanks for the tip. 👍

[@gettinbentfabrication9137]

No I just don’t want to see someone get hurt I have done this didn’t know really what I was doing at the time I thought it was a good idea well I put a 1.5 shaft through the roof

[@rickrack78]

I would try some longer screws to pull the cap up far enough to be able to engage the regular length screws

[@BrokeWrench]

Can't you move the shock shaft in or out to induce some pressure and move it up? I'm sure I've seen that done before, but maybe it doesn't work like that on bypasses?

[@jamesmerkel9442]

Once u lift it hving proper geometry & easy of bolting on separates good lifts from bad lifts. That & if right springs for med or high lift included or not. U will want bypass shocks if going high lift & worth the bucks. Race cars don't hve bypass shocks bc no lift range of travel but they do like struts in racing on streets bc space saver small package & longer life fatter than just shocks. 1 way to hve extra life is more oil fatter strut type & other is just a reserve life on the side. We hve tones of racing street tech or strut tech & choices but not nearly so for off-roading till last 10yrs. U don't hve to go coil over in long travel but most do bc that is where racing tech went, but for ppl not wanting racing tech HIT price wise springs r cheap. Budget high lift system not coli over TRUE dual rate spring set up is just hve 2 longer springs diff rates & spend the money instead on the magic 3,5, 7 bypass shocks. Springs & b4 that leaf springs r cheap & don't wear out bad. Shocks not cheap after factory replacement & do wear out quick 40k max normal driving struts seem to go 60k mileage 50% longer wear mayb bc shorter travel but for sure fatter product. Most ppl would do best price wise running 2 shocks 1st widder shocks w/reserve life & adjustment. 3rd pay up for 3.0/3.3 diameter shocks & 4th racing hardest trail bite the bullet & just pay up costliest best they hve got to fit your ht set up & car or jeep /truck. Only exception is trucks will b worth air bag or shock adjustable by air or 1 oil shock not loaded & 1 air shock as needed for load. Racing street can't beat a strut & bc most cars run on streets not that price mass produced products running even on req cars & SUVs/crossovers that don't go off road much.

[@dieselboy9996]

Cool video. Are you racing in Baja or are you going down to play?

[@DougBugBuilder]

No racing, but small events for sure.

[@philsulzberger7018]

Like everyone, I enjoy your vids. Do you put locktite back on those threads at final assembly? Run Fox bypass on or buggy and they are not so mysterious anymore. Hi from Tasmania, the state of Australia with the oldest still running offroad race. 48 years uninterupted, all sand.

[@DougBugBuilder]

Didn't add any Loctite. There was still so much on them I didn't want to add to it. So cool that these videos can bring us together around the world. Hello from America!

[@officialbananastudios4806]

Tbis sounds crazy but I wanna figure out how to have a 4 link straight axle like a trophy truck with a steal bug body

[@Paul_VanGo]

Since I simply HATE Allen bolts, and you perfectly showed why (where they are new and still almost striped). I always change all of them I can, to Torx. In the future, when they get stuck, the worst thing one will snap is the tool/bit, and not the bolt. I strongly advise to do the same. Future proofing. You could actually put a short rebound bumpstop inside the damper to change the solid stop from infinite to progressive. Saves shocks, rosejoints, etc. The piston shims are for high-speed dampening. The bypasses for low-speed dampening/landing after a jump.

[@DougBugBuilder]

I'll tell you that last one was right on the edge of stripping. Getting that out of there and not damaging the shaft would have been tough. The torx are a great idea. I'll see if I can order some up. I plan to have the bypasses installed with pneumatic 4" bumps next to it. So hopefully that will soften the blows. Although I'm a little worried the bumps will hit before the bypass tubes are covered. But I'll tackle that when I get there.

[@Paul_VanGo]

@@DougBugBuilder I meant rebound. Instead of the alloy collar inside. A sudden full-droop to a full stop hurts everything.

[@DougBugBuilder]

@@Paul_VanGo Ahhh, that makes more sense. Yeah maybe I can replace that piece with a poly bump or something. Thanks for the idea, it's mine now. ;-)

[@tptrsn]

@@DougBugBuilder I definitely do notice that the bypasses on Kings are much farther away from the end of the tube than on yours. Interesting..

[@bilbobob]

@@DougBugBuilder For thread locked bolts, hit them with a heat gun prior to attempting to turn them to give yourself the best chance of removing them trouble free.

[@jamesmerkel9442]

So this has 3 bypasses & they make 5 & even 7 highest end. Diff between no bypass & 3 or more is the speed of the rebound. Diff video shocks (even fox brand for off-roading) normal road driving hve 5,10,or 15 response cycle rate. Off-roading just not fast enough. Most basic lift setups max out at 2.5" body bc they just can't push back enough. Travel length & reserve life diff problem/deal then responds speed. Depending on type of car truck some hve separate coil from shock some hve strut & some coil over. Bigger lift ppl go to longer springs but coil ppl max lift end up using 2 springs coilovers & that allows 2 diff rates of spring, nice. But for shocks hving enough push back 3.0 & right length & poss extra life/cooling doesn't mean fast enough responds & that is the bypass deal.

[@andrewkolo8156]

How do you like those bypass shocks? They are bilstein right? Seems like a decently priced alternative to going with fox or king. Any luck pinning down tuning to your liking? I need to start buying parts for my build, a large chunk is going to come just from shocks, figure if they are worth a buy, I’d consider them, can’t find any user reviews Any help would be appreciated

[@DougBugBuilder]

Locked is the brand, I'm not sure who makes the ones I have. However I think now they have switched to a manufacturing company in the US that makes really good shocks. But the quality of these have been very good. Now that I'm running the Baja I find I keep loosening them more and more. But adjusting them out at the track is no problem.

[@andrewkolo8156]

@@DougBugBuilder gotcha! I’m trying to get bypasses on the corners without spending 6k Thanks for the reply!

[@berbower]

Have you had any trapped air/nitrogen in these? Have you had to "burp" them? I am working on my new bypasses this weekend for the first time. Thanks I have been through my coil overs with res.. just nervous about air in the bypass tubes

[@DougBugBuilder]

I thought that would be a real problem. But surprisingly when I took them apart minimal fluid came out. Not to say I didn't get some air in there. But when I put them back together I set them real loose, then cycle by hand. I don't really hear any air getting pushed around. Then I tilt them around to let the air collect in the bypass body, then tilt it so the reservoir hose is the high spot. Then crack the hose connection a little to let any air out. But all I got was oil, so who knows if that works. Good luck. 👍

[@berbower]

@@DougBugBuilder thanks for the follow through.. (I'm newer to KZbin so just learing about messaging) pleas post when you change the oil on those bypasses.. good job, thanks

[@rickrack78]

Is there any way to purge any air out of the hydraulic side of the shock? The bypass tubes being ported to the shock body so far up seems to act somewhat like a bump stop. Ported so far up the body allows them to work over the majority of the travel? It would be interesting to try more bypasses like you mentioned. How thick is the outer shock wall? If it’s thick enough, maybe you’d be able to spot face the tube and TIG weld another bypass or two on. Machine a chunk of brass to fit snug in the shock tube and position it in the weld area to act as a heat sink during welding?

[@DougBugBuilder]

Purging air will be tricky. I think I'll cycle the shock to push any air out of the bypasses then let the air rise to the top. Then "burp" it out of the fitting where the hose connects the reservoir to the shock body. I think once Wratchet is on the road and I'm dialing in the suspension you'll see me experiment with moving some of the bypasses around exactly like you are describing. There's enough meat there to do some welding. Great ideas you have BTW.

[@rickrack78]

@@DougBugBuilder, there has to be some way to purge the air out of the hydraulic side, or else the fluid gets aerated and viscosity goes nuts. The air charge over the piston in the remote reservoir is the only place the system should have air? Maybe there is a published procedure for purging? Maybe it doesn’t matter?

[@BrokeWrench]

@@rickrack78 professionals use vacuum bleeding to get as much dissolved gasses out of the oil as possible

[@jamesmerkel9442]

long pause at 23:49 to type, subject to dying, tuff break guy.

[@jamesmerkel9442]

4:55am cat meowed to come in faint just as toaster timer ran out 4:55am I was wrong Shannon only bought a new timer to replace broken 1 & it has ability to hve to timers for cooking 2 things same time.

[@jamesmerkel9442]

see Matt 13:35 shouted verse of 77x(perfect number) meaning ; & "God hides"

[@jamesmerkel9442]

Again GOD's story fully told, I told u so! many times so been fully told awhile NOW, & been time pntless evil in charge even a sec extra time, impossible to redeeem or make the grade 3 times losers max evil max effort down here need hell darkness or rebirth 4th try NOW word or tell Me to stick it Christ paid it All I am jerk off & don't matter tell all true or fiction just tell it.

[@CatarineausArmory]

Like

[@DougBugBuilder]

Thanks!

[@jamesmerkel9442]

So hving better picture NOW how springs & shocks work & why bump stops rubber or air. Just buy 2 cheap 2.0 shocks for price vs going up the cost curve or some rigs like defender hving 2 springs or shocks from factory not a bad deal/way to go. Easy of bolting on aside cost for most ppl is bigger factor than easy of bolting on. Where the just mount 2 shocks go bigger & higher up the cost curve won't work is< the responds time>. Bypass is the feature w/shocks that is worth the cost. Reserve life is an easy get depending on where u drive & how long(less than 1hr vs 1/2 a day being factor).

[@carbonshocks]

I never got back to you!!!! My bad!

[@DougBugBuilder]

No worries dudester. ✌

[@jamesmerkel9442]

comment 63 showing: I wonder why on bypass only 1 end of bypass has extra life, why not both top & bottom ends hving cooler-section/reserve oil life?

[@jamesmerkel9442]

shock pressures I heard talked about multi videos were 100 & 200psi type pressures. U don't hve enough pressure to see the magic of the by pass shock nor can u see 5,10,15 sec responds cycles per sec normal drive no bypass or higher cycle rate pushing by hand.

[@BrokeWrench]

The high pressures are needed for combating cavitation and handling heat. It isn't necessary if your just testing by hand. Often people will run 50 to 100psi for the street unless they are expecting the shocks to get a workout

[@redbeardsflippedodometer7279]

What is all the funk in the reservoir?

[@DougBugBuilder]

Grease, the sides are somewhat covered in grease. When the piston slides up and down it has a tendency to clump together. That's what you're seeing.

[@redbeardsflippedodometer7279]

@@DougBugBuilderok gotcha. Great video btw. .

[@sandman900rr]

are these ADS bypass shocks ?

[@DougBugBuilder]

Sorry, not sure what ADS is?

[@jamesmerkel9442]

ORI corp makes struts for Jeeps too not & to Me u get some of the coil over type extra working length & loading & responds vs coil & springs factory deal. I don't think high lift strut set ups r as good as coil overs, but more side by side head to head testing might prove that wrong. Bolt on easy spring & shock 1 prt together strut & longer wear is big selling pnt. Jeepers ppl don't seem to mind if not always easy bolt on problem & want best setup esp if upgrading but again rest of cars & SUVs ease of bolt on & how they wear is big selling pnt. Nothing wears like a spring 100k mileage normal use except old school wagon leaf springs 150k normal use wear.

[@jamesmerkel9442]

4:38/4:37am was 10;01 on bs toaster time.

[@jamesmerkel9442]

4:33+4:43+4:37 or 8=(math not time,100 not 60)13:04or5.

[@jamesmerkel9442]

verses who knows but to purify select & looked at timer for toaster oven & it said 1:55 ck ! We HVE A WINNER!

[@bengleckl1877]

What brand of shock is that

[@DougBugBuilder]

Locked Offroad lockedoffroad.com/bumps/

[@bengleckl1877]

@@DougBugBuilder how are they on road? Small imperfections etc. Do u know if they are peogressive oe digreasive etc?

[@DougBugBuilder]

@@bengleckl1877 Like most bypasses they're clicky, but that's the actual bypass valves opening and closing. But quality wise I'm happy with them.

[@bengleckl1877]

@@DougBugBuilder you can feel and hear them click when you drive?

[@DougBugBuilder]

@@bengleckl1877 You can't feel it, but you can hear it. Maybe not in a full bodied street vehicle. But in mine the shocks are right behind me. And it's only when they are going in and out, so it has to be offroad. On the street they are quiet.

[@jamesmerkel9442]

paused 25:09 to type 2nd mess.