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Mass-holes Rock Rey Build Thread I had been out of the RC game for a while and certainly knew little to nothing about brushless. My last truck was a TMaxx 3.3 but i never really enjoyed the nitro engine. I was searching and my cousin had recommended a Rock Rey. I found my Rock Rey used on KSL(Utah’s Craigslist) with a Ultra Power UP100AC Plus charger and 2C 5200 mah LiPo for $325, which was perfect since i was starting from scratch. This is how she looked when i first picked her up: https://uploads.tapatalk-cdn.com/201...aa8198130c.jpg Even though i had thought i looked it over, it turned out that the rear right shock was broken at the upper ball and kept popping off: https://uploads.tapatalk-cdn.com/201...d09c22a6c5.jpg This led me to these: https://uploads.tapatalk-cdn.com/201...91fe9b2236.jpg https://uploads.tapatalk-cdn.com/201...181dfbbd5a.jpg I also bought a pair of Powerstrokes for the front but they got sucked into some USPS sorting machine and got completely destroyed. Got a refund and bought a second set which finally made it: https://uploads.tapatalk-cdn.com/201...114431e821.jpg I also did a set of the Vaterra lockers in the rear and center diff since the truck was kind of helpless without it. During that process i could not get the driveshaft off, it seemed fused, and i ended up having to cut it off which destroyed the transmission output. So i got a new outputshaft along with a Hot Racing rear CVD: https://uploads.tapatalk-cdn.com/201...f5cd13ffee.jpg I also decided that I wanted it to crawl better so i picked myself up an HH Puller Pro 540 BL 2700k along with a Mamba Monster X. I installed a set of the Castle 6.5mm bullets on the puller pro and am currently waiting on a set of the Castle 6.5mm polarized connectors for the battery and ESC. The puller pro is also a 1/8” shaft so i installed a ECX branded 9T 3mm bore MOD1 pinion: https://uploads.tapatalk-cdn.com/201...b30f719d91.jpg Also installed this guy along with the Hot Racing 25t servo arm: https://uploads.tapatalk-cdn.com/201...e5ba14ff8a.jpg Last but not least, and this is how the truck currently sits, i built a set of 18 ga steel body panels: https://uploads.tapatalk-cdn.com/201...fada825923.jpg I need to pick up a new set of screws so they are flush. I also can’t decide if i want to paint the panels or just leave them in the raw steel. I am thining maybe truck bed liner in a rattle can since its pretty tough. I am also thinking about trimming back the mounts on the lower side panels so that the panels sit at an angle and tuck in closer to the chassis plate at the bottom: https://uploads.tapatalk-cdn.com/201...3b41ca2f44.jpg Anyways, this is where the truck currently sits. I am sure i will break things and add more parts over time. I just bought a TRX-4 Sport kit so I am not sure if the HH Puller Pro will stay in this truck or not. My intention was to make this a crawler and basher but i will see how the TRX plays out and decide from there. |
Re: Mass-holes Rock Rey Build Thread I got motivated and trimmed the side panel mounts back: https://uploads.tapatalk-cdn.com/201...0d3d1f6e6e.jpg |
Re: Mass-holes Rock Rey Build Thread The panels look nice! The Baja Rey has a similar gap on the sides of the pan. Presumably it's for ventilation, but it certainly likes to accumulate mud and debris. I'm considering that servo, as well as the 3225. I'll probably go the latter as they're basically the same price. I'll probably buy a few just to keep handy. |
Re: Mass-holes Rock Rey Build Thread The panels look great, especially with the side mounts trimmed! Let us know how you like the Hot Racing rear CVD / how well it holds up. Sent from my iPhone using Tapatalk Pro |
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I have driven on it a couple times but not enough to really abuse it. It does bind a little when the Powerstrokes are at full droop since they are pretty long. Not completely locked but the cup rubs and you can feel some resistance. |
Re: Mass-holes Rock Rey Build Thread Got the truck put together: https://uploads.tapatalk-cdn.com/201...60a034fafe.jpg I had to make the 10T holes on the motor mount slots for the 9T pinion but the mesh seems good. Also notice the RPM esc mount. I slotted the holes on the base plate ever so slightly so that it would mount to factory ESC pegs. Took it on its maden voyage around the living room(we are getting 1’ of snow at the moment) and the new servo is definitely stout. It whips the wheels hard even at the Mamba Monsters default 5.5V setting. The motor and esc has crazy good low speed control compared to the stock unit. It crawls increadibly slow with zero lugging even climbing over some of my sons various play mats. The motor direction seems to be reversed. I am waiting in my Castle Link to arrive and hoping i can reverse it in software, otherwise can i just swap two wires? |
Re: Mass-holes Rock Rey Build Thread I got my CastleLink in and was able to reverse the motor. I have been playing with the drag brake settings and they seem insane. Even just 30% drag brake would result in the truck doing an endo on pavement. I set it to 0 so it just freewheels now. I bought a Flysky GT3C and FS-R9B receiver used on here so I am going to put that in this thing and set the 3rd channel to switch between "rockrace" and "crawl" mode on the Monster X. Was screwing around today playing with the Monster X drag settings. My son has a little play mat with a nice 30* angle to it so i decided to do an RTI test with and without the rear sway bar connected. Makes a huge difference: Sway bar connected: https://uploads.tapatalk-cdn.com/201...9a5ff715c1.jpg Sway bar disconnected: https://uploads.tapatalk-cdn.com/201...cdf0b7754b.jpg Truck went up the ramp under its own power, so this is how it sits naturally. Sorry if the pictures arnt exactly the same. Its pretty hard to take the pic and try to hold the truck in place with the throttle. Obviously the truck drives like a wet noodle with the sway bar disconnected but it crawls like a beast. It would be nice to run the Hot Racing front sway bars and be able to quickly disconnect both when you wanna get in the rocks. That way it would be stable at speed but still flexy when you need it. One thing I will say is that with the sway bars disconnected, the rear trailing arms seem to bind on the rear shocks when trying to fully articulate. I think the arms are actually limiting travel, so I may try to open up the slots in the arms to help it twist a little more. |
Re: Mass-holes Rock Rey Build Thread https://uploads.tapatalk-cdn.com/201...f0389741e5.jpg https://uploads.tapatalk-cdn.com/201...1d8004cd1f.jpg Got the RX installed and AUX wire from the Monster X hooked up the channel 3. The TX is set to control channel 3 with the ch 3 trim switch, and i have it set to make 40% jumps so i have 5 drag brake settings from 0-100%(the range on the TX is -100 to + 100). It works nicely. At -100 the ESC is in Rock Race mode with 0% drag brake and has standard reverse. As you move positive the Crawl mode engages “crawl” reverse and the drag brake increases until it maxes out. |
Re: Mass-holes Rock Rey Build Thread Coating the panels in Rustoleum rattle can Truck Bed Coating: https://uploads.tapatalk-cdn.com/201...8267bdf7a8.jpg I used this stuff on the plywood top on my workbench in the garage. Short of running one of my drill bits into, not much seems to hurt it so i am hoping it will hold up well on the body panels. |
Re: Mass-holes Rock Rey Build Thread Panels are done: https://uploads.tapatalk-cdn.com/201...448040f845.jpg I got some M2.5x8mm stainless button cap screw on amazon but they suck. I think the hex is cut to big so my 1.5mm hex drives round them out. |
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The panels loom fantastic! I used the same Rustoleum for the bed in my TF2. It should hold up to anything! Sent from my iPhone using Tapatalk Pro |
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Thanks man. |
Re: Mass-holes Rock Rey Build Thread Hogged out the lower trailing arms: https://uploads.tapatalk-cdn.com/201...dcb1d0f9e2.jpg Its not pretty but it lets the powerstrokes flop over a little more before binding against the arms. This gave me another couple inches on my makeshift RTI ramp: https://uploads.tapatalk-cdn.com/201...150f5da4b7.jpg So now the rear tire can actually hit the ramp before leaving the ground [emoji3] One thing i never mentioned was that i got the powerstroke slash spring assortment as well as the prospec rear spring assortment. I just switched to running the powerstroke red primary(small) spring in the front with a red prospec spring, to running a yellow prospec spring and red primary. This balances the front articulation a little better with the rear. The rear was bottoming out on the ramp while the front still had maybe 10mm of travel left. The yellow spring knocks that down to a few mm. |
Re: Mass-holes Rock Rey Build Thread Nice job so far. And yes the drag brake is crazy strong on the Castle setup. For my RR I chose the custom setting and set it at 5%. It helps when running fast speeds and trying to make corners bc it slows you down just enough when letting off the throttle to steer (if I let off the throttle lol). Sent from my iPhone using Tapatalk |
Mass-holes Rock Rey Build Thread Came down the Moab camping this weekend, which is 3:45 from my house: https://uploads.tapatalk-cdn.com/201...fc16452088.jpg Got the truck out on some rocks just a couple hundred yards from the camp site: https://uploads.tapatalk-cdn.com/201...602be506ee.jpg https://uploads.tapatalk-cdn.com/201...dfdcbdf489.jpg https://uploads.tapatalk-cdn.com/201...59962a2289.jpg https://uploads.tapatalk-cdn.com/201...2c8538fd8f.jpg https://uploads.tapatalk-cdn.com/201...d8c5b03e05.jpg https://uploads.tapatalk-cdn.com/201...f4fcd63d91.jpg I ran without the rear sway bar connected. I feel like i need to swap the front and rear main springs so that the front suspension does some more of the work. The belly pan is definitely wide and gets cause up on a lot of stuff. I am also extremely motivated to do a traction mod to the front diff. Not sure i wanna go full on locker but certainly heavy lube minimum. |
Re: Mass-holes Rock Rey Build Thread Holy smokes that looks like a dream spot to run a Rock Rey. Truck looks good out there. And yes it does get caught a lot, but just back it up and go faster lol Sent from my iPhone using Tapatalk |
Re: Mass-holes Rock Rey Build Thread Oh and you got any video by chance? Sent from my iPhone using Tapatalk |
Mass-holes Rock Rey Build Thread No doubt that looks like a dream spot! Picking my jaw up off the floor, Lol! Thanks for the tips on tuning the shock springs. I have the PowerStroke kit you suggested and am hoping to play around with tuning the springs this week. Sent from my iPhone using Tapatalk Pro |
Re: Mass-holes Rock Rey Build Thread Went to the Rim Trail in Moab today to hike with the wife and 23 month old son, so took the truck along: https://uploads.tapatalk-cdn.com/201...92de67f915.jpg https://uploads.tapatalk-cdn.com/201...7aacf0ba73.jpg https://uploads.tapatalk-cdn.com/201...7fe348b3f3.jpg I didn’t get as many pics because i was too busy trying to keep up with my wife, who was basically running up the trail with our son in a backpack. I got a ton of great reactions to the car from other hikers. People expect to see 1:1 buggies on this trail, not RC lol. We did run into a troop of Wranglers trying to make their way up the trail but they were only a couple hundred yards in and were stopped trying to negotiate a step. |
Re: Mass-holes Rock Rey Build Thread Battle scars from this weekend in Moab: https://uploads.tapatalk-cdn.com/201...98fdaaef0e.jpg https://uploads.tapatalk-cdn.com/201...627576fa2c.jpg https://uploads.tapatalk-cdn.com/201...4299457d98.jpg |
Re: Mass-holes Rock Rey Build Thread What do people recommend for steering linkage/servo savers? I know Hot Racing and Team Losi make then but I had heard the Losi one is not the best and is a lot more $. |
Re: Mass-holes Rock Rey Build Thread I bought the HR setup they sell. Just make sure you use threadlock where the screws go into aluminum. As for the actual link itself, I was having issues with those ballhead screws that the link snaps onto actual snapping off at either the servo horn or other end. I ended up making one from rod ends and the Traxxas Revo hollow balls to run a screw straight through. So far has been good. Cut the head off a screw (M4 screw I believe) and thread the rod ends onto it. Last image is comparison of stock (with snapped screw) and replacement. Doesn’t show the Revo balls, but I replaced the plastic ones with them. Hope that helps some. https://uploads.tapatalk-cdn.com/201...3ec369c591.jpghttps://uploads.tapatalk-cdn.com/201...3c0a292bd3.jpghttps://uploads.tapatalk-cdn.com/201...34e72c81b1.jpg Sent from my iPhone using Tapatalk |
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Turned out the servo link was bowing when the servo would push on it but didnt have the same problem when it was pulling. I ordered the HR steering setup last night, and then realized it didnt come with a new servo link. I also noticed my servo saver was engaging just trying to turn the tires on flat ground, but I was afraid to tighten it as I didn't wanna break anything without spares. |
Re: Mass-holes Rock Rey Build Thread I think the reason I was personally snapping those screws was from having the saver too tight, but any looser and it didn’t want to steer. My RR is heavy though. I just tighten mine until it’s just snug enough to not have any play. Blue threadlock the nut on the saver as well. Mine kept coming loose. Personally I think the whole steering setup stock is poorly designed. Sent from my iPhone using Tapatalk |
Mass-holes Rock Rey Build Thread So i am insane, and i really dont like the way the front and rear suspension work together. My next project is going to be to try and fab up some spacers for the front shock tower so i can run longer shocks. Im thinking i might go powerstroke XT’s front and rear. Why? i was taking some measurements today from the lower shock mount holes on the a-arm to the shock tower hole with the shocks disconnected: Fully collapsed: 64mm Fully extended: 111mm Ummmmmm, thats 47mm of travel. The Slash rear powerstroke shocks give us a whopping 27mm[emoji20] The XT’s give us 41.3mm of travel, so an extra 13 mm or so. This should work out to ~1” of additional wheel travel [emoji3] Since the collapsed length on the XT’s is 84.7mm and the collapsed length between the stock shock holes is 64mm, i need to add ~20mm to the shock tower to get the truck to bottom out in the same spot. This will put the collapsed distance at 84mm and the extended distance at 131mm. The xt’s give me 84.7 to 128. Almost perfect match to the front suspension. |
Re: Mass-holes Rock Rey Build Thread I’m excited to see how this turns out! I agree that the Slash rear PowerStrokes are a bit short. I may try longer rod ends, which doesn’t help with the travel, but may reduce some of the preload issues in combination with a stiffer primary / longer ProSpec springs ... Sent from my iPhone using Tapatalk Pro |
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It should give some extra ride height in the rocks and let the front suspension droop as much as the rear does. The rear will hang way farther down currently. |
Mass-holes Rock Rey Build Thread Here is my first mock up: Full droop: https://uploads.tapatalk-cdn.com/201...448f932986.jpg You can see the left side is the Slash Powerstroke, right is the Powerstroke XT. Even though the slash powerstroke is disconnected, both arms droop about the same. Check. Xt making full use of the available travel. Full squish: https://uploads.tapatalk-cdn.com/201...abfea27dd4.jpg My current mockup spacers, ID 1/4”x OD 5/16”x3/4” long: https://uploads.tapatalk-cdn.com/201...b0538ba9ab.jpg Extended eye to eye length: https://uploads.tapatalk-cdn.com/201...bc5fc6fcf6.jpg So a 3/4” spacer will get you the full available travel of a Powerstroke XT in the front. Also, here is a comparison of the full droop front and rear, almost exactly the same: https://uploads.tapatalk-cdn.com/201...2f4c7913f4.jpg My only real issue is that my local hardware store doesnt carry long enough M3 screws, 30mm is as long as i could find. The front two screws are not even threaded in and rears just barely. You really need 35mm and 40mm long screws to get the same thread engagement as the stock setup. The aluminum spacers are not ideal because they are quite a bit larger than the M3 screw, however, they fit perfectly over the little locating nubs that fit into the shock tower on the front. I did order a 3/4"(19mm) thick delrin slab so I could make some rectangular spacers that should provide more stability and have the correct size holes drilled to keep the screws all lined up. I feel this mod is probably the best you will ever get from a losi in terms of all around suspension performance and should dramatically increase tuneability. You can run a huge amount of droop for bashing, or you could lift it up to get some clearance for crawling, all while getting huge front and rear travel. Now I just need to drop another $54 on my second set of powerstroke XT's. |
Re: Mass-holes Rock Rey Build Thread Powerstroke XT's ordered from Ebay, should be here Wednesday. 25 pack of M3x40mm screws ordered from McMaster because it was $3 and cheaper than buying 4 screws from the hardware store lol. |
Re: Mass-holes Rock Rey Build Thread Do you have any intentions on running limiting straps to prevent the shocks from rebounding 100%? Sent from my iPhone using Tapatalk |
Mass-holes Rock Rey Build Thread Quote:
No, the stock shocks and slash powerstrokes were both able to fully rebound without straps so i dont really see why it’s necessary. The suspension links themselves allow a little more droop than the shocks do so it shouldnt send the suspension into bind. and same with compression, the suspension has a shade more travel than the shocks so the bump stop should take care of things. |
Re: Mass-holes Rock Rey Build Thread The purpose of straps is to prevent it from rebounding too much. If you Especially if you’re running droop. Here’s an article about them for 1:1 vehicles. https://www.off-road.com/trucks-4x4/...fit-54528.html Sent from my iPhone using Tapatalk |
Mass-holes Rock Rey Build Thread Quote:
I understand. I've also seen them in use to protect the CV's in trucks from going to an extreme angle but that is not an issue here. The tires turn just fine at full droop. Why would I need them now if the truck never had them in the first place? All that article says is its to limit the shocks from fully extending, but almost no one is concerned about that with the stock shocks or regular powerstrokes. Any time i've seen straps on an RC it was for looks. I am genuinely curious. Do people routinely damage their shocks? Also, what about a small piece of rc fuel line on the top of the shock shaft, just below the piston. That would achieve the same thing i would think. |
Re: Mass-holes Rock Rey Build Thread I’ve heard of people damaging shocks from it over extending. I don’t run straps in the front, but I do use them in the rear, and it’s for a purpose the way I have mine setup. Not just for looks, but I have heard of ppl using them just for looks. I suppose the fuel line thing would potentially work. Sounds like it makes sense. Idk how others have their stuff set up, but the straps have helped to keep the back end planted in some scenarios and helps to keep it from donkey kicking as much. Sent from my iPhone using Tapatalk |
Re: Mass-holes Rock Rey Build Thread I locked my centre and front diff with lockers and love it. Still goes fast and crawls way better. I run 2S as 3S is crazy fast; too fast for my RR anyway even with open diffs. |
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I just bought a 3S lipo. I have a 9T pinion though so I am running 25% shorter gearing than the stock pinion and I found it wasn't spinning fast enough on my 2700kv Puller Pro. I think 3S should give me enough speed (and then some) without having to gear up. It already lifts the front tires if I have enough traction, I just want some more top end. |
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Re: Mass-holes Rock Rey Build Thread Man, you’ll have some shocks up front, Lol! Clever use of spacers to raise the shock towers; I thought you were going to add extenders to the top, but what you’ve done is obviously better. Nice new toys! I have the same on my RR and have been happy with them so far - although mostly speed runs for me so far (was 65 two days ago and now it’s snowed again!) so too soon to say what kind of abuse they can handle. Sent from my iPhone using Tapatalk Pro |
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Thanks for the link! Noob-ish confession, but I’ve never really understood the purpose for limiting straps. Should have been obvious in retrospect, Lol. Sent from my iPhone using Tapatalk Pro |
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That said, it made for an unexpectedly nice powder day on the slopes. Got out on the snowboard for a couple hours after thinking the season was over. I am very excited to get these shocks on. I was gunna make delrin spacers, but I found some aluminum spacers on McMaster that are the same ID as the M3 screws and same OD as the screw bosses on the tower(9mm), so they may be good enough. I am also thinking of using some of the heavy steel plate that I made the body panels out of as a brace between the spacers and shock tower to give it some extra lateral stiffness. The shock tower is a little squishy, I am honestly surprised no one has made aluminum ones. I also think having the SSD/Exotek/Hot Racing Front Bulkhead would help here because you would be anchoring the screws to aluminum instead of plastic. It may just give it some more structure. Same with the Hot Racing Shock tower brace. |
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