Yeti vs Rock Rey

[Rjohn929]

Originally Posted by DavidH

Yes, on youtube. 'Crawling', to be more precise.



Perhaps the need to conform differs among individuals.



I guess it only has to make sense to those doing it.



I was only commenting that I have not seen the any crawling being done with the baja rey so far. Perhaps with the rrey we will see some examples.

Fair enough but I am only referring to the Rock Rey and Yeti as the thread suggests.

[Arctic Cat ZRT]

Originally Posted by DavidH

I was only commenting that I have not seen the any crawling being done with the baja rey so far. Perhaps with the rrey we will see some examples.

I'm finishing up my sensored brushless install this week hopefully (waiting on waterproofing materials). Once the fresh snow melts I hope to have my rock rey out on the trail and climbing too. If I remember I will mount a go pro to my controller and take some video.

[DavidH]

Originally Posted by Rjohn929

My Tekno has better steering, better suspension travel, more tuning options,

How would you quantify these?

lower CG, zero torque twist, narrower chassis and is infinity more durable. Not sure how you would think it wouldn't be.

- It is my understanding that solid axles have the edge over independent when it comes to low speed crawling-type articulation. I am wrong on that?

- I have not seen this done to date, but I may have missed it. However, I have seen many convert their wraiths or bombers to IFS (and the odd slash to solid rear axle).

- I would also ask if this ifs/irs crawler that you propose could be built for a reasonable cost (ie the cost of a rtr yeti, its 2-speed upgrade, and a cheap set of tires)?

- Will this new crawler of yours maintain any of its SCT goodness when complete? What I find appealing about the yeti is that it can crawl decently on the rocks, yet still do a stable 30+ on the dirt and gravel.

And with a wheelbase of 12.7 inches and width of a minimum 11.6 it fits the bill pretty nicely. Only thing it would need are some custom tires to fit the 2.2/3.0 wheels to clear the knuckles. I don't think it would be legal to compete with in any way though.

The thought of competitive crawling hadn't even crossed my mind.

Sorry to get off topic.

No worries. If you ever decide to assemble this hypothetical yeti-killer, let me know.

[Rjohn929]

Originally Posted by DavidH

How would you quantify these?



- It is my understanding that solid axles have the edge over independent when it comes to low speed crawling-type articulation. I am wrong on that?



- I have not seen this done to date, but I may have missed it. However, I have seen many convert their wraiths or bombers to IFS (and the odd slash to solid rear axle).



- I would also ask if this ifs/irs crawler that you propose could be built for a reasonable cost (ie the cost of a rtr yeti, its 2-speed upgrade, and a cheap set of tires)?



- Will this new crawler of yours maintain any of its SCT goodness when complete? What I find appealing about the yeti is that it can crawl decently on the rocks, yet still do a stable 30+ on the dirt and gravel.



The thought of competitive crawling hadn't even crossed my mind.



No worries. If you ever decide to assemble this hypothetical yeti-killer, let me know.

It has been a belief they live axle is better but people are proving otherwise for U4 or even light crawling/trail running. The DMG with his B2B and UCFAB with the FIS PRT.

I hope to retain most of the SCT goodness. While it will run a little higher it will also have more static droop to help keep CG down. I thing running 30mph would be slow but it depends on how I'm going to power it. Probably 1/8 scale 1800-2200 on 4s.

I AM going to try it. I just have to decide if I want to tear apart old faithful to do it. I have an old SCT410 and a .3. I might just find another original roller for cheap and go with that. I have a lot of good races with my 410, it's like an old baseball glove.

[Col_Sanders]

Dan Wilson of VP had been posting pics of a Tekno SCT set up for U4. It had a cage on it and looked pretty cool.

I have a barely used SCT sitting here and I'm trying to figure out what to do with it. Might just try to get the Losi SCBE cage/body to fit on it.

[skeeler]

Originally Posted by Col_Sanders

I have a barely used SCT sitting here and I'm trying to figure out what to do with it. Might just try to get the Losi SCBE cage/body to fit on it.

I'm building an SCTE 2.0 kit into an SCBE right now.

[DavidH]

Originally Posted by Rjohn929

It has been a belief they live axle is better but people are proving otherwise for U4 or even light crawling/trail running. The DMG with his B2B and UCFAB with the FIS PRT.

I would expect buggies to do well in U4 and light crawling, which is why I said low speed crawling-type articulation.

I hope to retain most of the SCT goodness. While it will run a little higher it will also have more static droop to help keep CG down. I thing running 30mph would be slow but it depends on how I'm going to power it. Probably 1/8 scale 1800-2200 on 4s.

For an off-the-shelf solution like the yeti, that can go from crawling speeds to 30 while not overheating (or costing serious $$) I'm pretty happy with it. I know the sensored systems can be smooth, but are they are a replacement for the 2-speed transmission? And once we are spending this kind of money, can we bolt the yeti/bomber transmission into the SCT?

I AM going to try it. I just have to decide if I want to tear apart old faithful to do it. I have an old SCT410 and a .3. I might just find another original roller for cheap and go with that. I have a lot of good races with my 410, it's like an old baseball glove.

I do see some rollers on ebay. I'll have to snag one one day as I plan my next build.

[Rjohn929]

My opinion is that a good brushless system will provide everything you would ever need without a 2-speed. No more additional moving parts that could potentially fail.

I decided to get started.

[Arctic Cat ZRT]

I had recently put in a Castle Mamba Monster X and Brood Racing 550 2600KV sensored motor. I also installed a 10 tooth pinion (compared to a 12 stock). Slow speed control is excellent, still had decent speed on 2S, but 3S it should rip. Guess my 2 speed will be my battery voltage. Crawling/Trailing I will run 2S, go fast stuff will be 3S.

I agree with John, 2 speed means more moving parts to maintain and more things to go wrong. 2 speed are a pain in the butt IMO.

[magic_yeti]

Never had issues with my 2 speed in my Yeti.
Important is to set endpoints correct and use a fast servo. Mine shifts like butter even under throttle. So i can switch between Trail/crawl and go fast on the fly.
And it minimizes the disadvantage of my sensorless CC 1410 if i Trail/crawl.

sent by magic_yeti

[Rjohn929]

That makes sense because you are not using a high quality sensored system. Still doesn't take away the fact you have added more moving parts that could potentially fail.

[mikemcE]

I love my two speed, works well with a quality sensored system.
In low it will go through anything, in high it goes over most things.
I like the extra wheelspeed..... a bit of a gimmick, but gives a little extra




Hang up and Drive

[magic_yeti]

Originally Posted by Rjohn929

That makes sense because you are not using a high quality sensored system. Still doesn't take away the fact you have added more moving parts that could potentially fail.

I agree with that. But also with a sensored system it could help. And i personal like it as a feature. All things have pro and cons.

sent by magic_yeti

[DavidH]

Originally Posted by Arctic Cat ZRT

I had recently put in a Castle Mamba Monster X and Brood Racing 550 2600KV sensored motor. I also installed a 10 tooth pinion (compared to a 12 stock). Slow speed control is excellent, still had decent speed on 2S, but 3S it should rip. Guess my 2 speed will be my battery voltage. Crawling/Trailing I will run 2S, go fast stuff will be 3S.

Much like my original Clod Buster, but without the convenience of a simple slide switch.

I agree with John, 2 speed means more moving parts to maintain and more things to go wrong. 2 speed are a pain in the butt IMO.

Originally Posted by Rjohn929

My opinion is that a good brushless system will provide everything you would ever need without a 2-speed. No more additional moving parts that could potentially fail.
...

Outside of a few complaints about the clone kits, I've not seen evidence that that the two-speed option is a weak link in the driveline, in sharp contrast to the reports I've seen in these forums of what the bigger motors and higher voltages do to the pinions, spur gears, bearings, driveshafts, and axles of these trucks.

In real life, I am a control systems designer/programmer/integrator, so a little added complexity in my RC cars fine by me. And, I'm still running the RTR bevel gears in the front of my truck and I like how quiet the plastic spur gear is.

But, I'll watch to see if you guys can come up with alternate solutions to the question of versatility.

[BobTeagle]

Originally Posted by Rjohn929

I bought the Losi rear shock mount, rear link mounts (front and rear), aluminum bellcranks, servo mount and Metal Concepts 3rd member. I thought these were the weakest links although the RR had a much improved rear axle over the BR with better gearing to help with torque twist. I also went with Proline power strokes as I really did not like how sticky the stickers were. It's still in pieces as I'm waiting on some custom links from JEC so I can't comment on how well they worked out...... yet.

Also dropped in a Protek 170TBL. The stock servo is way too slow for me.

What size Powerstrokes did you go with? I assume XT's for the rear..

[Rjohn929]

Originally Posted by BobTeagle

What size Powerstrokes did you go with? I assume XT's for the rear..

XT's rear and slash rears in the front.

[Bluestreak85]

Jec is the way to go brother on four rigs I use his components

Sent from my XT1650 using Tapatalk

[BobTeagle]

Originally Posted by Bluestreak85

Jec is the way to go brother on four rigs I use his components

Sent from my XT1650 using Tapatalk

Just received my stainless steel JEC lower links. They are a work of art!

[Bluestreak85]

Told you love them

Sent from my XT1650 using Tapatalk

[Rjohn929]

Originally Posted by DavidH

Much like my original Clod Buster, but without the convenience of a simple slide switch.







Outside of a few complaints about the clone kits, I've not seen evidence that that the two-speed option is a weak link in the driveline, in sharp contrast to the reports I've seen in these forums of what the bigger motors and higher voltages do to the pinions, spur gears, bearings, driveshafts, and axles of these trucks.



In real life, I am a control systems designer/programmer/integrator, so a little added complexity in my RC cars fine by me. And, I'm still running the RTR bevel gears in the front of my truck and I like how quiet the plastic spur gear is.



But, I'll watch to see if you guys can come up with alternate solutions to the question of versatility.

I never said it was a weak link. Anytime you add additional moving parts you are increasing the risk of failure. Doesn't matter what you are talking about, that's just the way it is.

I still run the plastic spur in my Bombers and Yeti without a problem.