First Driving Test!! on the Mini Rock Crawler Build - Part 14
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- Опубліковано 9 кві 2022
- Today we finally get to test drive this mini rock crawler build. We test out the flex of the suspension and the 4 wheel drive setup. For this project I'm using the Fox 2.0 Air shocks. These are air only shocks and can be made hard or soft just by adding more nitrogen pressure. The fox air shocks are super easy to adjust and really light weight, perfect for these smaller projects but they can also work well in jeeps and other light rock crawlers. King air shocks are also a great option if your build is like mine, but I feel like the Fox airs have a better factory valving setup. The Fox air shocks should go together really well with the mini rock bouncer as that's really what they were designed for.
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i think you, red beard, grind hard and the others should do a build off once a year with given settings or parts and race the outcomes against each others in an annual meeting. that would be cool and a fix date in a year. Go on!
@johnnytheprick those guys are a bunch of goofballs
And the loser do a give away with there build to a random follower
Cars n. Cameras always invites him ,I think he's been twice, but grind hard hasn't ever been a part of it tho
@@trevorstevens3994 yeah !
@johnnytheprick and vasily builds
Primary clutch needs a rebiuld, bushings are shot and wd whatever you used is a bandaid fix at best. Someone else mentioned it here too that you need heavier weights in that primary as well and maybe a different profile too. Lots of variables in a CVT.
Toooooo many variables
Definitely needs to start with a heavier primary spring and heavier weights. This will solve both the engagement rpm (more weight - faster engagement) and clamping force (stiffer spring). When doing the flex test you can hear the belt wailing in agony due to slip. See a lot of this problem on the CanAm X3s when guys go to bigger tires (35s) or run paddles
absolutely..bigger spring for sure. quality belt too ... once he glazed it it was shot ...take a brillo pad to the surfaces of the clutch
@@tshupp72 green scotch bright and clutch cleaner, scuffing at a 45 degree across the sheave faces 👌🏽
@@austinconklin08 >neat
Thing flexes more than an Olympic bodybuilder. Fantastic job
🤣
Repent to Jesus Christ
“Consider it pure joy, my brothers and sisters, whenever you face trials of many kinds, because you know that the testing of your faith produces perseverance.”
James 1:2-3 NIV
J
I would have said that the damping was due to the thickness of the oil and the size of the valves used inside the shock. Less oil just means less lubrication and pressure
You can take out 'valving washers'from inside the shock to make rebound different.Same for dampening.
Those fox air shocks are emulsion shocks so removing oil will change the damping.
@@FarmerFpv the way I understand emulsion shocks is that the pressure inside needs to be quite high for the oil to foam up and produce a higher damping effect. So he will still need to balance between how much air and how much oil.. now he has removed a fair amount of oil. The damping will be a lot lower and will require more nitrogen to displace the lost volume from the oil removed. I've seen quite a few posts regarding these shocks as time bombs and I'd probably put money on it being because people have removed too much oil and then filled it with more nitrogen to compensate. They apparently explode like metal airbags 💥💥
@@MaNNeRz91 no
@@FarmerFpv incorrect. too much oil and they lock up or explode...but thats user error. they are valved like a normal shock. nitrogen is the spring rate oil is the oil. valving is standard same as any other shock.
Thinner oil, not less oil. That belt is already done and spitting off burning rubber chunks. If you insist on using that CVT system, please make a full cover so you don’t start a fire somewhere in the back woods.
It’s not too late to drive the gearbox with a chain/sprocket system. The motorcycle clutch will last longer and stay cooler if it’s under driven. A simple 3 or 4 to 1 chain ratio into the ATV differentials is enough to climb almost anywhere.
He has the skills to make the correct 2-speed box with reverse. He could easily make a 2:1 reduction high range, with a 5 or 6:1 low range, then adjust primary and secondary sprockets for the best gearing. He said he wanted the CVT so he doesn't have to mess with the clutch on the trail, but the way it's set up he's going to have to modulate the clutch to avoid burning up the CVT and chain. It would be VASTLY better as a direct drive with clutch.
Yeah, CVT on a rig like that would not be my first choice, thats for certain.
That CVT there makes no sense. It will always be the weakest link in all the transmission
@@leos7429 Thats also how i feel about the side by sides, instead of CVT and belt drive garbage, they could have just beefed up the transmissions and diff setups from the large 4 wheelers, or just made better ones so you could get them in a manual transmission option or an auto/tiptronic style setup. Ive just never been one for CVT, sure, its fine on a snowmobile and a small go cart, but when the large toys have them, it just seems like a cheap cop-out. Belt drive CVT on a 4 wheel drive off road machine? No thanks, would much rather have even chain drive multi gear if shaft is completely out of the equation. I have no doubt there are plenty who just fabricate them with something out of, say, a suzuki samaurai or similar small 4x4, or even larger if able to fab it all under a side by side.
Did you read somewhere in a manual or get told by FOX that this is an acceptable method to reduce damping? I've worked on lots of shocks before (in the bicycle industry) and there's almost always a very specific amount of oil required.
Removing oil, from my experience, will not reduce demping throughout the travel of the shock, but make it so that there is none at the top of the stroke and some at the bottom (compressed). The only reduction in damping you will get is due to foaming of the oil and that will be extremely unpredictable and constantly changing.
To reduce the damping of a shock, if you do not have a damping adjustment, you either change the viscosity of the oil (remove and replace the oil) or open up the shock and change the shim stack. I would not recommend changing the shim stack unless thinner oil is not an option.
Shocks require a specific amount of oil for more than one reason and you will reduce their performance and could damage your very expensive shocks by running them too low or to high on oil.
Great work tho !
Joel took the words right out of my mouth. Please listen to Joel.
@@Grim0954 same here, im a mtb suspensions mechanic and you never use less oil than whtas recomended by the maker... u change oil grades oe valve shims.
Those fox air shocks are emulsion shocks so removing oil will change the damping.
@@FarmerFpv Really... I've never heard of that. I'll have to look into it. Do you happen to have a link to this information ? I had a quick look and don't see anything.
Just had a look at their site and don't see anything about this... I do see in the specs that it says "Valving Tunable, velocity sensitive deburred valve shims" seeming to indicate what I thought was correct. Not saying I'm right, but I'd like to see where FOX recommends this.
I’ve tried looking this stuff up but can’t find any information on it with the shocks that I have. But on the pamphlet that came with the shocks it says to adjust the oil level to adjust the damping
That thing is crazy! So cool
Cool seeing you here
Haha amazing to see you here, thanks man. I love your videos 😁
@@ratherBweldingChris shock oil volume might impact rebound speed , but it should have nothing to do with whether or not it actually rebounds. Something doesn't compute. Unless the shocks you have had been overfilled with oil, causing some sort of malfunction. But they're just have an oil chamber and an orifice, so I dunno what would be malfunctioning from too much oil. I'm scratching my head on this one. Why did draining the oil finally get the suspension to rebound ? Do you have a Bad pressure gauge in your shop? Maybe the pressure you thought you put in them wasn't what the gauge said.
you need to change the fly weights in the cluch to engage faster at lower rpm for the gear box
That torque-twist might become a stability issue when crawling. I imagine those diffs don't have much gear reduction.
15:46 + 24:08 Under heavy strain the driveshafts are leaning the chassis over as they try to turn the axles.
I doubt it would be too much of an issue. Nothing against the machine, but its not like its a v8 in there twisting it lol
This is just an insane build like no other. Keep at it!!
Those has got to be my favorite build out of any smaller scale thing ever
Air shocks are a bit like black magic and counter to everything you know.
I’ve been using them coming on 10 years now.
You need to add more oil than standard, lower your air pressure to regain ride height and reduce your valving.
On such a light rig I’d consider drilling out an extra bypass port also.
Repent to Jesus Christ
“Consider it pure joy, my brothers and sisters, whenever you face trials of many kinds, because you know that the testing of your faith produces perseverance.”
James 1:2-3 NIV
h
What about running lighter oil to adjust for the valving.
From someone that has been in the offroad suspension feild for many years working with tuning on shocks... the Air pressure is spring force on these, the oil volume changes how these shocks "ramp up" on compression. And the valve shims are the damping of the shock portion of these air shocks. More spring force (air psi) will raise the vehicle. 1.2x psi will = the spring force (if they are 2.0's which they look like to me) Air shocks do not have bypass ports, they are not internal or external bypasses. I assume you are referring to the bleed in the piston.
@@UncleVio bleed port, that’s the word, essentially bypassing the shim stack.
@@freyja4954 changing the oils viscosity was the first thing I thought of when he just dumped it out. After that oil cavitates you no longer have a shock absorber just an airspring.
You’ll need to change the shock oil weight not the amount.
Dude, you should start your own company and mass produce these. What an incredible mini rocker.
Seriously? That thing is garbage. He can’t even keep it running. He needs some help with ideas. All that shit he built as a drive train is a nightmare. Absolutely myopic af.
@@longsleevethong1457 let's see you build something better 🤣
@@ItsGalaxys I build classic cars and motorcycles. If I did this sort of thing I would never create so many worthless moving parts. Think smarter bro. That drive train is absolute garbage and you know it.
@@longsleevethong1457 a lot easier to put old cars together then make something new you could do no better
@@trentonnelson8593 lol ok. Says you. Look…this contraption is junk and you know it. This is poor execution.
That is by far the most aggressive and fun thing you have built to date. Cannot wait to see it off road!!
I think we all had the same reaction to the flex... WOW
That thing is so freaking awesome, bro! Those fox shocks are emulsion shocks so removing the oil is the right thing to do to soften the damping. I'm in love with this machine!
for the noisy chain... replace the flat wheel with a small sprocket! it worked for me in the past
Climb the wood pile! That would be awesome.😎
cvt is trash for very low rpm work. cvt wont engane when needed or will engage at idle lol.
anyhow, amazing work as always.
You could always replace the chain tensioner wheel for a skateboard wheel 😉
While its life wouldn't be as long as plastic, it wouldn't get chewed up as much as tape would
70-80s roller skates have very soft rubber. Find a pair at a second hand store and that is 8 wheels.
That, or even a small sprocket.
Get rid of the plastic , put a small sprocket in place with bearings inside of the sprocket ...we used sprocket back in the 70`s and 80`s .
A chain is always bumping on round objects. Use a sprocket, that’s designed for it.
i still think it would be better without the cvt and rather a chain directly to the gearbox, sure it would be a bit harder to get used to driving, but it would be more power efficient and smaller
do u even know what u talkin about cleary u have 0 knowledge of a cvt a cvt is better then any other gearbox ever made thats why they banned cvt in formula 1 racing u make all the power at any givin point u need it it never stops makin power lol go back to school
@@NubsWithGuns I think he means for it to be 1 to 1 gearing. Like no variation
@@superbanaan9 Firstly, calm down. Secondly, why don't Ferrari, Lamborghini, Porsche, Bugatti, ... Use them on their high performance cars if CVTs are the best transmissions?
I was thinking the same thing at first I know what you mean . But That motorcycle clutch most likely can’t handle that much weight but that cvt is made for sxs’s so I think he’s doing it right just have sum tweaking to do this project is going to be major!
@@superbanaan9 do you honestly believe that a cvt like this which more or less works purely by friction won't take any power out of the system? Sure you can tune them to only engage at optimal rpm, but if you didn't have it it would work better at those rpm's
The best articulation I've ever seen out of a home built mini rock crawler by far. Par to none good sir. Good job!
Wow man this build series has been amazing 💯, it’s been great seeing the progress in your engineering ability’s over the last few years of watching I don’t think I’ve missed a single video, you’ve taught me a lot in that time too that’s why I love watching your channel 🖤 keep up the amazing work I’ll be here ✌🏻
proud of you man love the build you never cease to amaze
Man I am so proud of you dude. You have progressed awesomely.
At 24:40 you can see a smoking strip of belt land between the tires.Close cations read (Music){Applause}when the motor revs and you take off.It really is music to the ears too.Well done so far Chris!Heavier weights in the Primary and it'll grab better,and sooner.
That is by far the most badass thing I've seen anyone build on the planet . I would buy that thing in a heartbeat . Your a genius, mad scientist, and a great fabricator .
Sweet! FYI, when one of those primary clutches hangs up, it’s a sign that the synthetic bushings are wearing out, both the ones in the weights and the ones in the shaft. Also you might consider changing the clutch weights out to a heavier weight, you’ll get a more responsive clutch, but word of caution go too heavy and it will engage too easy.
Heavier weight = heavier spring unless your going for lower engagement which I would say this needs anyways. That said Im not there to experience the tuning first hand.
@@SuperBigdanno it’s pretty simple, plenty of snow mobileers do it all the time. Clutch tuning results in huge gains. I also imagine his secondary clutch alignment might not be accurate which can cause the secondary to lock up and in turn cause the weights to want to wobble, causing the synthetic weight bearings to wear causing the weights to smack and lock up in the clutch housing. Another thing that can cause is clutch balancing Ie not having the primary clutch properly balanced (it’s why you’ll see partial drill holes out of the outer plate. Put the plate in out of the “x” and or mix match parts and you’ll have clutch weights wear out and cause clutch lock. As far as tuning with heavier weights, it’s engaging pretty late, even with the belt tight, going up to the next weight heavier or even 2 heavier will help with the responsiveness. When you know you’ve gone too heavy, the weights activate the clutch at idle. He also probably needs a thicker washer inside the primary, it looked like he had some belt slop, it should be tighter at idle/off, to know how much is look up the clutch and the range of slop allowed. Do this with a new belt not a used belt.
@@AkPacerPilot as a snowmobiler I agree lol the bushings that cause the clutch not to engage are the large center bushings in the sliding sheve and outer cover, could be the weights are notched but he had to tap the clutch to get it to move so bushings it is. Usually when the weight bushings are worn they will ware into the towers if left long enough and then get caught on the tower and hold the clutch engaged, this can also happen with flat spotted rollers... rollers can be worn through and the weight gets caught on it again hold it engaged.
All that said I would switch that clutch out for a Power Bloc clutch and get away from the junk fly weight clutch all together. Way less part to ware out and easier/ cheaper to tune.
@@SuperBigdanno spot on, actually when you get the tooling or in my case fabricate the tooling, cvt clutch work isn’t all that expensive, last P85 I rebuilt, think I spent 80$ and that including replacing the weight bushings that Polaris says are “unchangeable”. When CVT’s get expensive is when they go way way too long and the synthetic bushings they call bearings wear out and metal gets damaged. I haven’t messed with power bloc, do they have a good match for P85 swap out?
@@AkPacerPilot yes Power bloc has a good match to the p85, they have a clutch for pretty much any application from 30hp to 200hp or more. They also supply a lot of oem snowmobiles and atvs. I wish they were a sponsor but nope I pay cash like everyone else lol. I will say that for a racer this is not a clutch for them (not quite tunable for that very last drop of power) but the average every day rider they are a really good long lasting unit. First inspection is not until 3000 miles and from what Ive seen they really dont need that but still good to have a look.
Pretty crazy to have the motor idle without the primary spinning like normal, 2nd and 3rd must top that thing out going pretty quick, or just smoke the belt lol
My motorcycle has the same engine, its a great engine. Pulls hard after 4,000 rpm
I wish I had your knowledge and skills. So excited to see the finished product and you've done a GREAT job with this insane beast of a machine. It's so hard waiting to see this BEAST out in the mountains somewhere climbing on and over any/everything. By the way I noticed the KFX700 in the background, I've been looking for 1 for quite some time now. Well bud keep making these great videos and have fun doing it but be safe also. 👍 🤘💪👌
Congratulation to be in in this step after hard working period.
Man if you were evil I would be scared....congrats on the awesome machine/build...
Use a sprocket instead of the delrin. It'll mesh with the chain better and make less noise. You have the machine tools to make an arbor for one. As for the shocks, to make the dampening lighter there are actually parts you can get for higher flow rate and less dampening. You really shouldn't remove the oil though as it's there for more than just dampening. It's also the lubrication...
1 of the most anticipated projects ever! I hope u get a high back racing seat for it.
I definitely feel you about breaking down at the house then breaking down in the trails Definitely do all the test riding around the house when we break down we have A rope of shame to take you back home
i think the primary bushings need to be cleaned up or replaced. also, a light sway bar in the rear would help with the body roll.
It needs a gear reduction at the axles, a sway bar will reduce flex but a gear reduction will not while doing a better job at reducing torque twist.
Is there any reason why you wouldn’t use a regular sprocket as a chain tensioner instead of the plastic piece so it would be quieter and would also be less wear so you wouldn’t need to always be replacing the plastic piece?
Was thinking same. Wouldn't there be more friction with a sprocket due to area of teeth???
@@geoffburrill9850 I was thinking the sprocket would have less friction but I honestly have no idea lol
@@mitchgohl4854 Ya all are to young lol , I used a sprocket in the 70`s and 8-0`s on our dirt bikes , the sprocket had a bearing in the center , they never wore out ...
@@88s10Durango Never part i dont buy but lasted way longer than actual gears since there is way less force coming to tensioner.
Chain Tensioner - Maybe a skateboard, roller skate, or rollerblade wheel.
Maybe use a double V-belt instead.
I was actually hoping you could use a longer belt & mount the primary clutch inline with engine output with a 3-jaw coupler & a few bearings. The CVT is probably still setup for way higher RPMs. Mess around with the springs & weights.
Getting rid of the CVT is most likely your best option. But, if you don't experiment & try things outside the box, than you will never know the answer to, what if?
I've been looking forward to this, and 30 seconds in, and once again you just impress the hell out of me. The sky is the limit for you young man.
Your not gonna see anything leaning back like that in the seat. Either you’re gonna be leaning forward cramped as heck or staring up into the sky the whole time.
Thats what I thought too he first said I wanna build a rock bouncer then changed it to a crawler an didn't change the seat I guess
I think your gonna have to lose that torque converter.. rock crawlers are usually in the low rpm range. Rock bouncers are in high rpms but this thing just screams rock crawler to me.. especially with that amount of flex.
That flex is insane!!!
Always use low when applying power. Use high for covering ground.
Absolutely amazing, fantastic job as usual, your talents just keep getting better and better 👍🏻 love your excitement when your projects come alive lol
I think belt was too tight
Agree
Well, this will be put up after the first time he actually "rock crawls". Seat position, weight distribution, generally dangerous with body parts less than an inch from moving parts, concussions from slamming head into cage, etc etc. I guaranty you no organized licensed off road groups would allow you to run that with them.
😒
Spoken like a true expert. I'd imagine he'd be wearing a helmet and harness like in his other builds, so concussions aren't likely.
And the weight distribution seems fine to me. That engine is far forward and the seat isn't over the rear axle. It absolutely isn't as optimal as a full-size chassis but as far as simple crawlers it will certainly suffice.
The bottom line is you couldn't build anything like this, and I think you know that. Constructive criticism is fine, but not when it's based on non-facts and coming from someone with no experience.
You NEED to take that Thing out in the Country for a RIDE and have some FUN
Great to see all your hard work paying off , what a beast! Hopefully that torque converter holds up
Amazing rig you built. Maybe the best thing I’ve seen ever anywhere. Great job.
Love to see the old Dutch *DAF variomatic* back in this nice piece of home brew
You are an extremely talent young man! You and a few others on you tube give me hope for the future. So many lazy good for nothing young punks out there not willing to put the video games down and get out of their parents basement and get a job or do something construtive. Keep using your talents and you will go a long way!!
Absolutely loved watching this dude stress testing the crap out of this beast. What a sick build!
that is the most badass go-cart I've ever seen. I always wanted to see someone build something like it and it has finally been done. mad props
also side note: I've been around 4x4 rock crawlers long enough to know that you are going to want a chosen weak point that is easy to replace when broken. guys with weak jeep axles sometimes wont upgrade to chromoly shafts so they don't destroy the ring and pinion gears, all I am saying is the slipping clutch may be a blessing in disguise.
Dude your projects have come a long way. Amazing work.
That thing is gonna be sick what a beast! Travel on that thing is pretty damn amazing can’t wait to see you do a little bit of rock crawling with it! Incredible build though and great video can’t wait to see what’s next👍🏼🤩💪🏼
I would love to build one of these some day once the XJ build is done, looks like it will be fun once it’s running good!
I love your build videos. This one is one of your best yet. I have a tip for your chain tensioner. If you use a sprocket instead of a wheel, it will be much smoother and quieter. Keep up the good work.
That thing has crazy articulation!!! Thats so rad!
Such an awesome buggy. Super impressed. Really enjoy watching you build your creations. A nice 22re would sure power it up.
OMFG WOW! THAT FREAKING GETS TWISTED. YOU REALLY SCORED A W ON THIS BUILD
Awesome build. For the tensioner, try using a front sprocket as an idler. That should quieten it down nicely.
came here to see the self centering 6 jaw chuck, very nice. very cool project with a DAF 33-esque transmission 😀
Another really great build. With all your great builds gave me an idea for a new engine design.
Insane. Best build ever. I would be soooo happy if I built this. To spine those tires, I’d say it’s doing ok ✅
Watching the videos from the start of the build to the end is simply a delight. Thank you for your awesome videos. Some feedback. Looks like the transmission belt will becl a continous issue and it seems the buggy tilts a lot.
Unbelievable! Beautiful job!
Add annon board air system to air up the other 3 sides etc when flexing like that, so you can drive a bit more level.
Always cool to see the transformation from bunch of steel tubes to moving vehicle, hope you have lots of fun with it :)
Hey man, love the builds, you’ve made almost all the off-road vehicle types now!
Great job man looks amazing
Dude! Amazing build! That cage is top notch my friend! Cant wait to see more of this awesome crawler 💎🙌
MAN! You’ve come a long way! Great work to see you’re where you are!
Maybe add fenders to keep dirt away from u and Boby panels
I can't believe how much useful information everybody is chipping in.
sick suspension! looks like a rad rock climber! Nice machine work! Crazy!
Wow!!
I am 100% jealous.
GREAT WORK!!!
It's amazing. Another homemade car read, thank you for sharing
Not even 1 minute in, DANG. Ready to see this thing put to the test! Nice job bro.
Man….all the cool stuff you’ve built in past years man. Stuffs gotten better each time and more complex in your design but in a cool way. Honestly have ever thought about marketing your projects and getting a small piece of land to do all testing on? I would seriously support the channel if there was a way of us UA-camrs/ subscribers buying your builds and can add more and to support your channel and keep building more and possibly bigger things but honestly with your channel has not disappointed me at all throughout the years watching you build stuff. Be crazy to see a car motor build next for whatever comes to mind for you man. Doing awesome.
This thing is the coolest build I've seen yet out of anyone...you could market and sell these
Awesome machine buddy! Keep up the great work.
This man has a lot of trust in them stand jacks.
That flex! What a great unit! Only problem I see is the clutch not engaging properly! I can’t wait to see it crawling!
finally, nice job sir. I've been waiting for you to finish that project.
This is incredible! Great job!💯🙌
I think there is a lot of great things with CVT transmission and before thinking about taking yours out of your vehicule, you should learn about them and ajust them the right way. Your primay engage to high? Bending your strap wont fix that problem. Now your strap is way to tight and I think that is one of your principal problem with your CVT setup. I’m a snowmobile guy and I know CVT may be capricius sometime but when its finetuned properly, it work insanely! Great job by the way!
Looking good you gonna need to box in your cvt tho the mud and dust will make it spin right off
Fantastic so far.
crazy awsome mashine you built there!
The crawler makes a hell of a parallel ditch digger.
Impressive ramp travel- helluva good job
Wow. Super sick crawler. Talented dude
8:46 you got a lot of faith in those Jack stands
Put that thing on 37s and that thing would be dope, it’s still dope how it is, great build
Best one yet! I'm hooked can't wait to see painted
Look like fun to ride look forward complete how it will look
Absolutely impressive! Great Video!
Awesome man. A dream of mine. Not nessasarily a rock climber but a off road build
This man is the builder of the most bad ass machines !!
Anyone else see the smoking piece of belt fly off while in HI range? Haha. Nice test overall. Great outcome!