If you have a lathe or a friend with one, then it would be really easy to make a new bottom cap with a schraeder valve in it. That would make refilling the nitrogen without losing any pressure really easy. Threaded schraeder valves are very commonly available, they're often used in nitrogen accumulators on earthmoving gear.

@majanboo22

2 жыл бұрын

Yes, I thought about it back then. I knew about the schraeder valve, and an even quicker and easier way to do this is to measure out the Outside Diameter of the schraeder valve, find a drill bit just slightly smaller, and then drill out the bottom aluminum cap with an electric hand drill using a steel/carbide drills bit set. Then use a tap & die set to thread the drilled hole to match the schraeder valve threading. Then prior to installing the bottom portion of schraeder valve and tightening the inside nut down, place some medium (or high) strength lock-tight (or JB weld after you have measured and made sure everything lines up and holds pressure). Screw the scraeder valve in and you are good to go.

Appreciate the time you put into this. Thanks

@majanboo22

4 жыл бұрын

infinitexsound you are more than welcome.

Just wanted to thank you for this. I learned a lot from your videos. I have rebuilt many motorcycle shocks but I had a BC RAM coilover start leaking on me and I tried to get the parts and do it myself but couldn't. No that I kind of know how they work I'm probably going to rebuild something in the future. Maybe even revalve.

@majanboo22

8 жыл бұрын

+TheXdmgx7 No problem, I'm just glad to help. It is not that hard at all. There a just a few steps. Just make sure to pay attention to every step you take. I now only do this when I know I will not have any interuptions or distractions, otherwise you may forget a step (nitrogen charging, in my past mistake) and have to start all over again.

@0foxgiven

8 жыл бұрын

+majanboo22 yeah that would be bad. Where can I find seals? Know a website?

@majanboo22

8 жыл бұрын

+TheXdmgx7 google the term "RE Suspension".. That is the company's name. I ordered my bilstein to shock pistons and piston bands from them.

Great video man. Just wondering if you post a link or mention where you got all your replacement parts?

@majanboo22

2 жыл бұрын

Thank you and Yes I did post the replacement parts. I posted a full scale, 3 part tutorial ( and math for you to use for your particular car) on clublexus.com . Go to googl and type in the search “Diy schock revalve clublexus” . The tutorial is there with pictures, parts list, part numbers, and where to buy them.

Dude, I literally had a blast watching your videos. I was laughing my ass off when you broke your nitrogen tank needle LOL... anyways... Although my intent is not to swap out the internals (I'm rebuilding mine) it was very informative. BTW are you going to make a video on how to make the speaker cabinets? Thanks!

@akoust1c

7 жыл бұрын

Oh, also how are the shocks holding up now?

@majanboo22

7 жыл бұрын

I definitely will be making a video on how to create the EMi12 (polk RTi12, but better). Just super busy at the moment. Also want to make a step by step video tutorial on the math behind shock revalving.

@majanboo22

7 жыл бұрын

+Kevin Park the shocks are holding up great and with the calculated 10kg/mm springs the ride is smooth as butter. I may calculate and revalve for 14kg springs out of curiosity. If so that would be some time from now.

@majanboo22

6 жыл бұрын

+Frugal_Fabrication I know this is a super late response, but I have to say congratulations on your calculated suspension setup. Lol, I just saw your message response today.

Very informative thanks a bunch for making these videos. Do you have any sort of comparison between stock BC internals, and the bilstein internals? What differences did you see?

@majanboo22

6 жыл бұрын

Yes, there definitely was a big difference, but keep in mind that this has a lot more to do with the shim arrangement setup I choose to install than the the selection of bilstein piston vs bc piston internals. In my case the bc piston’s rebound orifice holes were way smaller than the compression orifice holes. This is how BC racing was able to get large amounts of rebound force in their shocks, without having to worry so much about the quantity/thickness of the shims. And from a business perspective this keeps overall costs lower as you don’t need all these shims to complete the same task. Yes there is a big difference between the model of bilstein piston I chose vs the model of BC racing piston that came in the BC coilovers. But technically, BC racing can suddenly use a different model of shock piston that is say 50/50 (compression flow/rebound flow) digressive and can be equal or better (lets say it has extra featured options) than the 699 model bilstein piston.

@majanboo22

6 жыл бұрын

Bilsteins shock piston from what I was told is 50/50 (pertaining to flow in compression and rebound without any shims added). In terms of a shock profile graph, this is like painting on a blank canvass. For the most part you can achieve various results all based on how you setup your shims. The BC racing piston that came with my shocks was more of a 80/20 (compression flow/rebound flow) if I had to guess. If you get a chance, google “DIY shock revalve clublexus” and look at post #7 of that message board thread. You will see the difference in size of the rebound holes (smaller ~20%?) vs the compression holes (larger ~80%?).

@majanboo22

6 жыл бұрын

Oh yeah, you are welcome man. No problem. I have some more vids that I need to put up, just been so busy.

@alecthompson5856

6 жыл бұрын

Thanks for the response. I understand what you're saying. I know that coilovers are recommended to be rebuilt internally every ~30k miles, would you recommend going with a bilstein internal rebuild or just buy new shock body's from BC for $95 apiece? Would the bilstein internals offer a nicer ride quality over the brand new bc shock bodies? Thanks

@majanboo22

6 жыл бұрын

+Alec Thompson Please understand that it is more just putting the Bilstein parts inside the BC racing shock. You need to do the math and calculations listed on the “DIY shock revalve” post at clublexus for your model of vehicle. This is the bare minimum if you are looking to do internal upgrades. It is essential to solve for the listed equation variables for your vehicle and have an idea or understanding of what you are desiring or looking for in your vehicle ride and suspension handling characteristics.

Great Videos .I'm trying to get my friends with Blown BC shocks to watch them..They say they want to do Autocross with me but their excuse not to is "My BC are Blown" 95.00 to replace them is cheap.A upgraded shock would be better..If I can't get them to follow your rebuild..Do you know of a Strut Cartridge insert that could work or fit.As in what FK coilovers do.Thy offer their Strut cartridge or a KONI cartridge as a replacement.As long as it fits the BC shell it should work.

@majanboo22

5 жыл бұрын

george pollock No, I do not know of any strut cartridge that will fit in the BC coilover shell bodies.

Hi Kene, after looking at your thread, why do you want MORE rebound than the stock BC? I would have thought that would cause you to have an even less comfortable ride since you will be getting a jacking up effect? Also, it doesn't seem you get much more compression on the shock dynos maybe 50LBS more if you jack up the dial. Overall, I'm guessing you want MORE dampening if you go to a softer shock, (eg going from the 14k to 10K) but what is that magic ratio. I guess what I don't really understand is how you find the frequency clearly. I had some other questions in the thread. maybe you can answer.

@majanboo22

4 жыл бұрын

zazzn my goal and purpose in the revalve was to match the toyota supra’s bilstein HD shock dyno at the BC racings middle “knob” settings which I did. The higher rebound levels are the result when you turn the BC racing adjustment knob to the max setting. If I had revalved the shock to achieve the Bilstein HD shock dyno graph exactly at the BC racings “max” knob setting, majority of the lower knob settings would not be very useful (outside of a near under-damped setup). The graphs max knob settings you see can be used for the guys who unfortunately are super low to the ground and have almost No ground clearance. It is a stiffer ride, because the shocks do not easily give into the forces acting on them, but this ensures that this super low car is not hitting the pavement and scraping at every bump, twist, or turn in the road. Yes you are right, having overly excessive rebound forces on too soft of a spring can cause a “jacking down” effect on uneven/unsmooth pavement (non-flat race track scenario, regular L.A. streets for example). But also remember that a car’s motion ratio, vehicle “sprung weight”, and strength of the spring’s rating plays a role as well. If you start to increase the compression damping forces of the shock too much, the shock won’t compress as easily, and will resist compression when you hit raised bumps in the road. Then when you hit bumps on the road at high speed, they end up becoming ramps that your car flies/lifts off of like “the dukes of hazard” (exaggeration). Yes if going from a stiffer spring(14k) to a softer spring(10k) you can go for a little more compression damping to aid in the vehicles cornering and handling characteristics. Also, pay attention to where you add compression forces as well (etc. low speed, mid speed, high speed regions) If you reduce the shock compression forces too much, when you hit a turn in the road (not focusing on swaybar effects here), the car will lean/“tilt” far too much/easily into the turn vs having more shock compression force. If you have too much compression force, the car won’t lean at all into the turns, and God forbid there is a road bump midway through the turn as your tires may catch some slight air and lift off the pavement (extreme situation). There is a balance. The frequency you choose is the like the level of “snap-back” capability you want in your cars suspension response, but remember that you must also design your shock’s rebound and compression characteristics to contain springs frequency “undulations”/cycles.

@zazzn

4 жыл бұрын

@@majanboo22 so based on what I was reading and talking to someone about I think I'm like 1.76hz and 1.8x on the rear. Again I saw the math you have posted to figure out the h but I don't have all the values. Was that part of the spreadsheet you bought? Finally, I think I'd be happy in the 1.4 range probably softer than what you want at 1.55. seeing that the knob does practically nothing, is there anyway to achieve what you did without buying a piston just via washers. Also with the digressive piston from bilstine was it that that piston is digressive bothways? Did you see my cl PM's?

@majanboo22

4 жыл бұрын

zazzn Yes, saw your message on CL. I sent you a message also with a few qeustions also. Let me know. If you go towards the end of the club… Post or click on the link that leads to the part three which I believe is the results, you will see on my hand written mathematical equation that the frequency was at 1.55 or 1.52 Hz depending on the occupancy weight of the people in the vehicle. The BC racing knob actually still does serve a strong and valuable purpose with my final revalve results. The knob allows for a high level of versatility with shocks. You can turn the knob to its lower settings to allow for a softer damping of the shock to accommodate a much lower spring rates or in the middle to go with a slightly firmer spring and match the shock damping ratings of the BILSTIEN HD shocks. I can set the knob to max settings for a stiff spring, to accommodate a super low ride height with minimal suspension travel. The knob works and makes the shock versatile for many scenarios. Yeah, the bilstein piston I used is digressive on both sides, and the same on both sides. The updated bilstein COB piston I was also told was the same flow rate on both side. In my tutorial, the BC racing BR piston is a linear piston. You can try your best to get it to act like a digressive piston, but it is not. A true digressive piston has blow off in the high speed region.

@zazzn

4 жыл бұрын

@@majanboo22 I'm trying to follow the gixxer drew setup which was comparatively soft matched with the valving that you have would produce I'm guessing an enjoyable ride... Right now I very much dislike the way the BC BR's feel on my sc300. Long up and down bumps are like a Cadillac where the car bounces 2-3 times on the highway at full soft on the front. The rears feel ultra stiff and going over a speed bump makes it jump after hitting the bump if I go anything over 2 MPH. I've been doing a lot of reading, and I think what I dislike is the gas pressure in the bc is too high causing me to feel everything that I shouldn't feel. Then mid / low speed bumps are fine and soft enough. However, higher speed bumps / large dips are pretty nasty, and I know for a fact I'm hitting the bump stops. Finally in the rear when going over a speed bump it feels like the rear is far too stiff going over it at anything over 2 mph gives me a massive jolt where i almost jump out of the seat.

@majanboo22

4 жыл бұрын

zazzn send me messages on clublexus and we can can continue there.

I'm glad I found your post. I have been interested in rebuilding shocks for a while, but hadn't jumped in yet. I recently sold my BC Racing coilovers and bought some Fat Cat Motorsport coilovers. I'm sure i will be diving into some shocks for my other cars, and helping my friends with theirs. How did you discover that the BC shocks have the self healing valve?

@majanboo22

8 жыл бұрын

I once saw a bc racing promotional video, which showed the bc racing assembly line.

@codllc

8 жыл бұрын

I believe I saw that one as well. I guess I just wasn't paying that close attention.

@zazzn

4 жыл бұрын

I've been talking to Fat Cat... He's ultra-expensive for the work, I had 600$ worth of consult already and I feel I got very little from it. Do you believe it's worth it? I was considering going with is setup.

@codllc

4 жыл бұрын

@@zazzn I've been very happy with my setup. If I had to do it over again I would go down in spring rate, but that is it.

@zazzn

4 жыл бұрын

@@codllc mind my asking what it cost you so far I'm in 650 for just consult time