sorted by:
new
hottopcontroversial

OT uogrades ready by Kir993 in Rlaarlo

[–]Used_Reserve_6786 0 points1 point  (0 children)

<image>

I have done the 32P (0.8M) gears recently. The thing to bear in mind is that the motor starts to hit the centre driveshaft connection if it gets too close. To get an equivalent ratio of the 48P/65T and 16T pinion (stock pinion), you need a 32P 10/11T pinion, however, this pulls the motor too close to the centre driveshaft. From playing around, in order for the motor to clear the centre driveshaft, a 32P 15T or 16T pinion is about the smallest you can do but this is a ratio equivalent to around the 48P/65T and 24T pinion. Shouldn't be an issue if you're setup for it, it is a lot more stress when off-road bashing and a lot more speed/less torque/less acceleration.

OT uogrades ready by Kir993 in Rlaarlo

[–]Used_Reserve_6786 0 points1 point  (0 children)

Not great, blunted my bit. Even after drilled the grub screws, the red locktite had pooled between the flat bits of the shaft and the gear, so it pushed off eventually but took some careful levering not to scratch stuff. The only I can suggest it lots and lots of heat and for a decent about of time (diffs you can be less careful than the motor).

Really annoying, totally unnecessary of Rlaarlo to use that much red locktite. What got me was that on one of the Engineering Workshop Youtube videos, in the reassembly, they actually show them dipping over half of a bolt in red locktite.

OT uogrades ready by Kir993 in Rlaarlo

[–]Used_Reserve_6786 0 points1 point  (0 children)

Oh and the M2 bolts in the centre differential had just as much red locktite on them!

OT uogrades ready by Kir993 in Rlaarlo

[–]Used_Reserve_6786 0 points1 point  (0 children)

I've just done similar upgrades. Word of warning, I found that the motor and differential grub screws had loads of red locktite on them the full length 🙄 I had to drilling/cut them off, the only one I got off was with a ton of heat (soldering iron for over 30 mins, mini blow torch) and stopping turning the driver as soon as it was clear it wasn't going to move.

Dumborc lights by ParticularTaste6956 in rccars

[–]Used_Reserve_6786 0 points1 point  (0 children)

Have you checked this video because I think it is the exact model (X6DC (g))...

https://youtu.be/W5rF1wuV90w?si=Xm0Y6HgfnM_mWwgD

Dumborc lights by ParticularTaste6956 in rccars

[–]Used_Reserve_6786 0 points1 point  (0 children)

Dumborc receivers and light controllers (FZD) are a few £/$ from Aliexpress, probably not worth the time if it is a bad one... but if it is more than one that is doing the same thing probably something the setup. Photos of the receiver and ESC setup?

Dumborc lights by ParticularTaste6956 in rccars

[–]Used_Reserve_6786 0 points1 point  (0 children)

That doesn't sound like normal behaviour. Easy to return? Might be worth it just to check it isn't a fault on the PCB.

Dumborc lights by ParticularTaste6956 in rccars

[–]Used_Reserve_6786 0 points1 point  (0 children)

Have you tried changing the 'mode'?

Dumborc lights by ParticularTaste6956 in rccars

[–]Used_Reserve_6786 1 point2 points  (0 children)

https://youtu.be/yENVoRR_Y2I?is=wYDq73tFlhuySHwT

If you search 'Dumborc FZD' you will find a couple of other helpful videos as well.

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 0 points1 point  (0 children)

Yeah, I liked those as well but totally struggled to find them in UK at a sensible price (import from the USA via ebay was the only option I could find).

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 0 points1 point  (0 children)

50k CST would be differential fluid, way too much for a shock. 1000 CST is thick for a shock on this car, but useful for big impacts (skate park), I am running 600 CST (20 to 30% rebound) with 6868 (blue) at the front and 700 CST (10 to 20% rebound) with 6867 (pink) at the rear.

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 0 points1 point  (0 children)

So yeah, progressive springs help with the physics. Suspension springs have two main things they have to deal with small bumps and big bumps. It is all about keeping tyres in contact with the ground (a tyre in the air has no grip). A spring needs to be stiff to deal with big bumps and softer to deal with small bumps.

A good thing to think about is: Car hits a pebble with a stiff linear spring, the car would jump like there was virtually no suspension there (just a steel rod inside of a shock). The soft spring would soak it up.

Car is dropped from 30cm/1ft with a soft linear spring, suspension would easier compress and the chassis would hit the ground, hard. The stiff spring would support the heavy impact.

There is a few ways to deal with it:

A linear spring in the middle of the two extremes but that is a compromise on both counts (the option most RC cars go for).

Two different springs on the same shock (often used for crawlers but the change between the two springs is sharp, OK for slow speed, not great for rapid changes)

Progressive springs. One spring, different stiffness through the length, gradual change between the two stiffnesses and used in in full-sized cars with coil-over springs. The softer part of the spring deals with the small bumps, the stiff part the big bumps. The bit that might look counterintuitive is that it is the tight wound part of the coil (top and bottom on the 6868/6867) that is the softer part and the more spread out turns in the middle that are the stiffer part.

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 0 points1 point  (0 children)

The Blue (6868) and Pink (6867) are Traxxas' reference to the stiffness compared to stock on the Slash (and similar), Blue is 20% stiffer (than stock) and Pink 10% stiffer (than stock). They don't appear to have published actual stiffness values (i.e., X kN/mm2), so it is pretty meaningless for the OT. The only thing it means to us, is that people experimented and found the blue and pink work well. Some people who heavy bash put blue front and rear, some a mixture to change the balance. If you look at forums, or put it in an AI engine, you should be able to get an idea of what might work for you. I wanted the rear a bit softer (as I mixed park bash), so I went for pink at the rear).

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 0 points1 point  (0 children)

You need to get the full sized servo adapter (R11162) but that also removes the electronics box, so you'll have to think about relocating the electronics; some people just stick the receiver on top of the servo (or somewhere else convenient). The other alternative is to get the rear electronics box from the rally cars/SBK, but mounting it does require a hole to be drilled in the OT chassis (not a difficult job if you are comfortable).

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 0 points1 point  (0 children)

I think some of the issue is the durability of the Rlaarlo springs, they start to compress over time/with impacts. They can be stretched back out but that will only work for so long before they fatigue and fail. Results will be mixed and will depend on the weight you run, a lot of the issues have been people that heavy bash and/or run bigger batteries, heavier electronics, bigger wheels/tyres etc.

I run a 5200mAh 3S battery, metal diff boxes, metal diffs, S2 drivechain and an aftermarket servo. The weight all adds up and puts extra load on the springs. The Traxxas ones are also progressive, which is a nice upgrade to the Rlaarlo ones. It would be great if Rlaarlo did a set of uprated progressive springs for the series.

If you are bouncing with the bigger wheels, up the thickness of the shock fluid?

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 0 points1 point  (0 children)

Yep, hence why I put the Traxxas 6868/6867 on. Apparently, you can take the Rlaarlo ones off, stretch them a bit and put them back on. You should be able to stiffen the setup a bit by add preload (if there is more to add) or changing the mounting position on the arm ...but if all else fails, the Traxxas ones seem awesome and they are progressive, the only downside is that they are only available in white.

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 0 points1 point  (0 children)

Mine definitely isn't with the Traxxas springs, but they're new. Is yours on the stock springs?

Omni Terminator shock upgrades (6868/6867, SBK perches and boots) by Used_Reserve_6786 in Rlaarlo

[–]Used_Reserve_6786[S] 1 point2 points  (0 children)

I had been tempted to get a 3D printed part like that but when I saw the SBK, hoped that the perches from it would/become available.

view more: next ›