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05-16-2021, 03:43 PM | #1 |
Rock Stacker Join Date: Mar 2021 Location: Florida
Posts: 79
| Finally got to go crawling.
So I built this 2 weeks ago...Then immediately dropped all the brushed parts I was going to use and went all out. TRX-4 Sport Kit Castle Copperhead 10 Holmes Puller Pro 2700kv Amazon 20kg servo (working surprisingly well) SSD Wheels Pro-Line Krawler G8 Tires Yeah Racing Metal Bumper (flipped the mount for a bit more clearance) So the first drive went great! I high sided once and rolled twice, but overall I think it was really good. I had a blast and have a R/C addiction. Next comp is in 3 weeks and I plan on entering! Picture Time! Much higher then it looks, this is easily 8ft high. Crawling above my head |
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05-16-2021, 09:42 PM | #2 |
Rock Crawler Join Date: Apr 2014 Location: Portland
Posts: 835
| Re: Finally got to go crawling.
Looks Great. Before ya go to the next Comp, add some front Brass Portals. My TRX4 is now my Fav Crawler. |
05-17-2021, 12:10 AM | #3 |
Rock Stacker Join Date: Mar 2021 Location: Florida
Posts: 79
| Re: Finally got to go crawling. |
05-17-2021, 03:00 AM | #4 |
RCC Addict Join Date: Nov 2017 Location: 3rd rock pile on the right
Posts: 1,801
| Re: Finally got to go crawling.
Most definantly, it puts weight down low to keep u planted. My trx4 axles have the brass outer portal covers n it helps alot. She climbs up n over almost anything
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05-17-2021, 05:50 AM | #5 |
Rock Crawler Join Date: Feb 2020 Location: Fort Leonard Wood
Posts: 868
| Re: Finally got to go crawling.
If you are going to comp weight is your enemy, it lets gravity kick you ass. The lighter the better. Unless you rules count points get rid of everything you can. You do need more weight up front and you do need over and underdrive. There is not a TRX body that is good for comping, ALL of them are too heavy. My comp bodies are about 4 oz. I use a hardbody in C1 that does weigh more, were I comp they do use SORRCA rules for C1 and count points. This is my C3 "TRX". It is just over 7lbs which is on the heavy side. [IMG][/IMG] Last edited by MOguy; 05-17-2021 at 05:53 AM. |
05-17-2021, 09:27 AM | #6 |
Rock Stacker Join Date: Mar 2021 Location: Florida
Posts: 79
| Re: Finally got to go crawling.
Really appreciated, so portal covers and less weight up top. Is the lower cg battery tray worth running? I’m already running a lightweight shorty pack.
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05-17-2021, 10:06 AM | #7 | |
Rock Crawler Join Date: Feb 2020 Location: Fort Leonard Wood
Posts: 868
| Re: Finally got to go crawling. Quote:
I run my receiver on a a chunk of my battery box that is just big enough to hold it. I run my a small 1500 battery up front. I have about 4 oz in each wheel and a brass axle on servo mount but no other weight up front. I run 24% OD/UD. Mine weighs about 7 1/4lbs. | |
05-18-2021, 07:32 AM | #8 | |
Rock Crawler Join Date: Apr 2020 Location: Northern MN
Posts: 656
| Finally got to go crawling. Quote:
MOguy, Do you have a picture how you’re battery is mounted up front? I run the same size packs and would love to ditch the battery box Thanks ETA - I’m interested in the axle on servo mount. What are the benefits of it? Are you able to get tighter turning, better articulation, etc? Thanks Last edited by Benp; 05-18-2021 at 07:49 AM. | |
05-18-2021, 09:18 AM | #9 | |
Rock Crawler Join Date: Feb 2020 Location: Fort Leonard Wood
Posts: 868
| Re: Finally got to go crawling. Quote:
The Servo mount the picture above is a Tweakin it was 3D printed and quickly broke. I called him and he would send me another and never did. I now use a JEC brass one, it is a good mount. My tuning is MUCH MUCH tighter now. I have broken the steering joint in the axle because of it and now run Chromoly shafts. I do have selectable lockers and if I turn off the lockers and it truns even tighter. Also by unlocking the front locker when turning tightly you reduce the chance of breaking the steering joints in the front axle. I have done allot to my steering. I have dremeled away some of the hubs, I have changed the linkage and done the servo on axle mount. I have spent allot of time just looking at it and watched how things moved and what I need to do to allow it to move more. Specifically the benefits of the servo down on the axle is much more room and less binding allow for more upward susp travel and the weight of the servo is lower. The steering linkage and the tie rod stay basically parallel this makes turning faster and easier. The steer linkage position does not change as your suspension flexes, this makes things smoother and frees up space for upward suspension travel. You also ditch the panhard bar. The panhard par puts stress on the axle and frame mount and they can brake. The panhard bar gets in the way of upward susp travel. Once it is gone it frees up space for suspension movement. Last edited by MOguy; 05-18-2021 at 09:28 AM. | |
05-18-2021, 09:22 AM | #10 | |
Rock Stacker Join Date: Mar 2021 Location: Florida
Posts: 79
| Re: Finally got to go crawling. Quote:
Another couple of questions Should I keep the slipper or just eliminate it? Springs, does anyone have a spring rate / setup sheet for the TRX-4? Or should I just start buying springs and seeing what works? | |
05-18-2021, 10:12 AM | #11 | |
Rock Crawler Join Date: Feb 2020 Location: Fort Leonard Wood
Posts: 868
| Re: Finally got to go crawling. Quote:
On my C1 I have a hard body and use sliders. The hard body was expensive and it wont bend and fold like a lexan body. Where I comp they only count scale points on class 1 the sliders not only protect the body but they are worth scale points. For my other RC I just get cheap lexan bodies, $30-$40 and $10 for paint. I don't care if they get beat up. For springs I got the light ones I could and use 2,000 shock oil. The RC above weighs just over 7lbs. | |
05-19-2021, 01:46 PM | #12 | |
Rock Stacker Join Date: Mar 2021 Location: Florida
Posts: 79
| Re: Finally got to go crawling. Quote:
Side note: A buddy has a Capra builders kit for sale, you think it's worth picking up for a C3 build? | |
05-19-2021, 04:10 PM | #13 |
Rock Crawler Join Date: Feb 2020 Location: Fort Leonard Wood
Posts: 868
| Re: Finally got to go crawling. I suppose anything can be built but out of the box they are not competitive. I have seen a few in comps and they rarely can keep all 4 wheels on the ground. Their balance or geometry or something is off.
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05-20-2021, 08:12 AM | #14 |
Rock Stacker Join Date: Mar 2021 Location: Florida
Posts: 79
| Re: Finally got to go crawling. |
05-20-2021, 09:02 AM | #15 | |
Quarry Creeper Join Date: Jan 2021 Location: in the Canyon
Posts: 377
| Re: Finally got to go crawling. Quote:
https://www.youtube.com/watch?v=HOqQWhlb-K4 I have 4WS on my build as well, it is ABSOLUTELY worth it. | |
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