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shelljeep's Berg thread

shelljeep

RCC Addict
Joined
Jan 7, 2010
Messages
1,077
Location
Lafayette
This may end up being more of a tuning/repairing thread instead of a build thread since it's been built for about 10 days now.:mrgreen:
I had a BJv3 chassis with Losi MOA under it for about 6 months, recycled that into this build as well as most of the links.
I bought the axles used from the classifieds here, and stripped the chassis down while they were being shipped. I had the rig running the day after the axles showed up. I took my time testing shock placement, clearancing any binds, etc, basically bench tuned it as I went. I have been super pleased with how well it works, from day one. Miles above the Losi setup.
That being said, there is room for improvement, and I suppose that's what this thread will be about.
The axles had Super 300's, 86 Jeep steering, VP Hi Steer knucks up front. Will be installing the Dlux Knuckle Weight system in the next couple days, really looking forward to ditching the wheel weights.
Rear has been clocked, Fubar lockouts with RC Axlemaster shafts.
I'm running a pair of Mamba Micro Pros on 40C 3s to a pair of Team Brood 2011 LE 35T motors. I'm using the brand new wantAsummit DX3E Dual ESC Adapter to control them. The motors are pretty amazing, great stuff unless you are a 3rd gear. More on that later. The Dual ESC adapter is an awesome product as well, works perfectly for mixing, saves the expense of swapping out all your Spektrum stuff to Futaba.
Here's a few pics of it as it first came together.
This is my estimated sprung weight, rtr is 5.7 pounds for now.
GEDC2518.jpg


I was a bit sketched by 3 ears holding a 7950, so i did what I could to make it as strong as possible. This is a RCBros servo clamp I used to help spread the load on the unsupported hole.
GEDC2520.jpg


This is the cube I managed to squeeze all of the electronics into. I may go back and remove all of the unecessary wiring in the near future. I removed the switch and white motor wire before installation.
GEDC2531.jpg


Here's a shot from the front, showing the steering and another view of the electronics bundle. I have a Robitronic horn for it, just need to pick it up from a buddy. You can also see the lipo tray attached to the lower links just behind the motor, I plan to make a BTM tray for lipos but I need to order something smaller first. These are 1050's, I get 20-25 minutes out of them.
GEDC2530.jpg


A couple of side shots, belly is 3" at the front, 3.5 at the back of the skid. My links are set up roughly 60/40 front/rear length, and my weight bias is skewed a little bit further forward than that. The lower links will be Ti soon, with the fronts getting new bends for ground and motor clearance. The front shocks are in semidroop, rears fully sprung. It got a solid 66* on the board first time up it.
GEDC2528.jpg

GEDC2532.jpg


An overhead to show the steering angle. I may try to work with the knucks pointing forward to see if I can improve my Ackerman. I guess alot of guys have been going with the idea of reverse Ackerman giving more usable steering angles since you could max the outer tire and keep the inside tire off the shocks, rather than the opposite. My biggest problem right now is that the shortside Super 300 stub's cup is galled and wants to lock up and throw it out to full lock which stalls the motor. I need to see if I can smooth the surfaces inside the cup and on the ball. I seriously doubt that will be successful, and probably will end up buying replacements.
GEDC2527.jpg


Here's a shot of it upside down. Pretty easy to flip itself back over.
GEDC2534.jpg


That's all for now. I stripped all but 3 teeth off the front 3rd gear, and have been running a CKRC for a few days with success. My Mann Gears showed up today and i will try to get them installed, along with all new bearings tomorrow. I think it's cool as hell that you can get all the way into the case by removing 4 screws (tierod, and 3 case screws).

Here are some videos also. I can see how bad my control of the rig was in the first couple, I wasn't used to my new switch layout, etc. I'm a bit better at it now but still have a long way to go before it flows w/o thinking. Disregard the driving in the rock race video, that's a whole 'nother thing there.:mrgreen: These Brood's will get you in trouble quick, I think I actually need to set some steering expo in order to open it up all the way in the yard.:ror:

First day in the Garden with it:
http://www.youtube.com/watch?v=qmNOeTdPh3I

Climbing a previously unclimbable route:
http://www.youtube.com/watch?v=GLN1iIxlDGc

Same climb after tuning my foams:
http://www.youtube.com/watch?v=TdR8Xy1HuY8

Trial rock race course. Broke my chassis in 2 places getting this footage.:cry: Still usable but will need to cut the front horns shorter, may not be legal now?
http://www.youtube.com/watch?v=X5MV87SLl5w
 
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Thanks J!
I'm happy with how the link positions are working at the chassis now so I will be skinning it this week. Going to build the side skins so cover the upper rear shocks, forming a slider.
Also just ordered some of JeepinDoug's Mini T cups last night. I need to research the springs for that. I have a few Vendetta springs as well as MRC springs that seem to be the right diameter. I need to figure out whether they are close to the mini T rates and lengths.
 
You'll like the mini springs....if your tires were into the springs before, then they'll just hit the shock both a bit and smoothly slide off.

BTW, I still need to get you that list.....sorry that it has taken me so long.
 
You'll like the mini springs....if your tires were into the springs before, then they'll just hit the shock both a bit and smoothly slide off.

BTW, I still need to get you that list.....sorry that it has taken me so long.
That's ok on the list, I know you're a busy guy. As much tech as deal out around here I'm surprised you have time to breathe."thumbsup"
Looking forward to staying out of my springs and not losing spring caps on a daiy basis.

Thanks man!
 
Nice work Shell. Those poor front lower links look like they don't like the 60/40 setup too much, I'm interested in how you like it long term. Also, if you feel like it, I would try the rig with the rear shocks mounted one hole further in, and try a middle bend bent rear link
 
Looks good. the only thing I would change for sure on it is the rear lower links. The bend in them should be more towards the rear to allow more break over which would allow the tires to hit before the links."thumbsup"
 
Nice work Shell. Those poor front lower links look like they don't like the 60/40 setup too much, I'm interested in how you like it long term. Also, if you feel like it, I would try the rig with the rear shocks mounted one hole further in, and try a middle bend bent rear link
Thanks Shelby, and yeah, the front links are kinda hack. You caught me.:ror:
They were oriented with the bend up when in use with the Losi axles, I had to turn them that way to clear the motors/cases on this build. They do tuck in pretty close to the motors, and don't hang me up "much", but I won't do the Ti links the same way.
As for the long term results on 60/40, I feel like they are already in. I have ran this setup for about 4 months or so on the Losi setup amd I liked it from the start. There was a climb in my old garden, a steep climb with a ledge you had to bump up halfway up it, took some wheelspeed and it was easy to flip over backwards on it. Never could make it until I 60/40'd the links. Be careful how much shorter you nake the fronts though, go too far and it won't flex, it just jack.

Looks good. the only thing I would change for sure on it is the rear lower links. The bend in them should be more towards the rear to allow more break over which would allow the tires to hit before the links."thumbsup"
I will take that into consideration when I build my Ti lowers, thanks!
 
Looks really good!

Youre lucky you started a build thread. If not, you would have been answering a lot of PM's from me. :lmao:

Its nice to have a guy to go to that is hard on rigs and figures out what all the quality parts are (no shelf queen).
 
I guess I'm kinda rough on things, although not nearly as bad as I was at first. I just expect them to do what I want, and sometimes have to "adjust" my expectations. It doesn't take me long to locate weak points though.:mrgreen:
PM's are always welcome."thumbsup"
 
Dang Shell. You told me that you changed the axles but the Chassis to. I like the KOH Style footage. Looks like the new car is working well.

What is a LIPO?

Can't wait to get out and play again. I'll get me one sooner rather than later i hope.
 
Nope, same chassis my man.8)
I thought you would like that vid. I'm gonna have to suggest we run those races at the END of the day though or it will be a short dat for alot of folks. LOL
Lipo is short for lithium ion polymer, bat trees my brotha."thumbsup"
 
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I guess I'm kinda rough on things, although not nearly as bad as I was at first. I just expect them to do what I want, and sometimes have to "adjust" my expectations. It doesn't take me long to locate weak points though.:mrgreen:
PM's are always welcome."thumbsup"
Yep, no fluff with you. I know if you say its good stuff, it is.
 
Yeah this will be a type of racing that will have to be fine tuned just like the learning curve with the 1:1 ultra 4 cars.

I'm sure this style of racing will be limited if this type of destruction becomes typical with the way cars are currently being built. Like anything we will see what brakes and fix it IF that is the racing that you like to do.

Remeber it's not always the fastest guy that wins. Some of it is the guy that finishes or just has a solid rig.

I have lots of ideas for KOH style racing with scale cars (whoops, doubles "normal" 1/10th scale type track with rocks) but I'll have to put my money were my mouth is once I have my own car to race:lmao:. For now I'll stick to being a judge.....Reverse! LOL inside joke
 
Repaired the chassis today, pretty simple stuff. Installed skins too. Left the hood normal length so the chassis's still in spec for comps.
Here's the damage:
GEDC2600.jpg

GEDC2601.jpg


And the fix:
GEDC2602.jpg


I'll get some shots of it skinned tomorrow.
 
Yeah this will be a type of racing that will have to be fine tuned just like the learning curve with the 1:1 ultra 4 cars.

I'm sure this style of racing will be limited if this type of destruction becomes typical with the way cars are currently being built. Like anything we will see what brakes and fix it IF that is the racing that you like to do.

Remeber it's not always the fastest guy that wins. Some of it is the guy that finishes or just has a solid rig.

I have lots of ideas for KOH style racing with scale cars (whoops, doubles "normal" 1/10th scale type track with rocks) but I'll have to put my money were my mouth is once I have my own car to race:lmao:. For now I'll stick to being a judge.....Reverse! LOL inside joke


I like the idea Blase. Will be doing a trial race like this very soon. I've considered this before and posted up about it but got no response. I'm in the right crowd now though.:mrgreen:
Staggered starts, only time counts. A purpose built rig would be pretty cool, stiffer spring rates, less unsprung weight, 2 speed trannies... Everybody's gonna be running their comp rigs for now though.
You know you're gonna need at least one of each.:twisted:
 
I got it from Krawlfreak here on the board, YTC Customs. Send him a pm and he can hook you up with the new improved version, this is a BeetleJuice V3, V4 is current.
 
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