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Old 2015.01.08, 12:01 PM   #1
Duster
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AMZ 2wd Chassis

When is the 2wd chassis /car going to be released?
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Old 2015.01.08, 01:10 PM   #2
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I think I saw some where during late January but I am not entirely sure.
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Old 2015.01.30, 11:15 AM   #3
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We'll have them in the shop in February! When I have a more concrete date, I'll let everyone know.
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Old 2015.03.03, 10:36 AM   #4
Mrs Mini-Z
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Hi All! Just wanted to update you that the Atomic 2WD AMR has arrived! It's currently IN STOCK in Kit form with a host of optional parts available too.

The RTR with Tx will be here later in the month, so stay tuned for that too!

Be sure to check out all the pics in my AMR Gallery!

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Old 2015.03.11, 12:24 AM   #5
dwight
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Amr

So I picked up and Atomic AMR. Didn't realize that it was the kit tho. But it's all good. I started to assemble the kit and it wasn't that bad.(did it at work). Hear are some things about the kit I think you need to know. The front shocks from the AMZ will work on the front only. You will need the Atomic big bore shocks for the rear. Know the car takes awd rims front and rear.
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Old 2015.03.19, 10:53 AM   #6
67 Mustang
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I'm new to the forum so please bear with me while I get proficient. I built the 2wd kit and tried to use a Turnigy 3XS transmitter with it. It does bind but the steering servo surges and stutters back and forth and the esc goes only forward sporadically. Has any one used this transmitter with the Atomic receiver/esc?
Thanks, Bob
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Old 2015.03.19, 11:14 AM   #7
67 Mustang
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After I tried to use the Turnigy transmitter and Atomic receiver/esc unsuccessfully I thought I'd try a Kyosho 03-VE board out of one of my Kyosho Mini-Z's. I used a digital servo from one of my helicopters (an old E-Sky) that I wasn't using anymore. I only used the motor, gears, and feedback pot of the servo and connected it to the built in amplifier on the Kyosho board. It's nice to use the same KO Propo transmitter as my Mini-Z's. The servo doesn't work nearly as quickly as the Mini-Z setup so response is much slower. I've attached two pics of the project. I don't know how to insert them in the thread. Let me know if there are any questions.
Bob
Attached Images
File Type: jpg Atomic-1-down.jpg (103.6 KB, 75 views)
File Type: jpg Atomic-2-down.jpg (96.2 KB, 63 views)
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Old 2015.03.19, 12:11 PM   #8
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Got a few questions for you, Bob:

1. Are you concerned about running the VE board on lipo or are you using life cells?
2. Is that the "stock" steering link position or is that created by you to match your servo arm?
3. I'm curious to get a closer look at the "spur" assembly to understand the drive line... is it some sort of hybrid awd/03 mix?

As a thought (and if you're handy) you could try boxing up an mr03 servo assembly and create some sort of steering link for this front end. Since it appears the knuckles have a bolt on aspect to them it could be feasible. ...
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Old 2015.03.19, 05:57 PM   #9
67 Mustang
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Hi and let me explain a few parameters of my operating situation. My main hobby is rc aircraft (mainly helicopters) but this time of year some of my flying friends and I get together and run our Mini-Z's on an RCP 8ft. by 12 ft track in my basement. With this size track, we run our cars on a single lipo cell and still can't get to top speed. I run two 330 mah."AAA" lipo's in parallel and get about 30 minutes of run time. We run 6 minute heats with a Robitronic timer. We use 6 tooth pinions to get good acceleration. I've seen that people have used 2s on the Mini_Z's with no problem, but It's no advantage with my track size and I haven't tried it.
The stock Atomic steering servo setup is not good for "bump steer" problems but it's one that will fit in the confines of the car. The stock servo saver was too loose and so I used a standard servo horn. It's about 1 mm. longer that stock, making "bump steer" worse but giving a little quicker response. With my very smooth track, "bump steer" isn't really a problem, but I would like to lower the track rod to be in line with the bottom wishbone and eliminate it.
The stock drive setup uses a double reduction spur gear with the same orientation as the MR-03 VE Mini_z but a little further forward in the chassis.
This, along with the steering servo being so far back, leaves very little room for batteries. Notice the pic of the stock Mini-z servo sitting next to the Atomic car and you'll get an idea of the cramped quarters. I would really like to use the Mini-z servo motor and setup and maybe I'll find a way to "shoehorn" it in place. The servo with the white arm is the one I'm using and the dark arm is stock Atomic. I'm using a battery holder I made from an old LED flashlight. I'm mounting the batteries transversely across the chassis now but I hope to mount them longitudinally (like Mini-z) and maybe then there'll be enough room for the Mini-z servo. Bob

Atomic 3 down.jpg

Atomic 4 down.jpg

Atomic 5 down.jpg

Atomic 6 down.jpg

Atomic-7-dowb.jpg

Last edited by 67 Mustang; 2015.03.19 at 06:12 PM. Reason: Better organization
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Old 2015.03.19, 06:03 PM   #10
67 Mustang
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Hi and I thought I'd post these scans of the instructions so you can see the arrangement of everything. Let me know if there are any questions. I also wanted to say that I think the Atomic car is well engineered and made. Bob

Atomic-scan-1-down.jpg

Atomic-scan-2-down.jpg
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Old 2015.03.21, 07:47 AM   #11
dwight
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Would really like to see the way you put the servo wires to the board
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Old 2015.03.21, 11:45 AM   #12
67 Mustang
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Hi and I hope this pic helps. The motor and feedback pot from the servo simply take the place of the stock Mini-Z motor and feedback pot. Just unsolder the Mini-Z items and replace with the servo items. If the servo runs off to one end and stays or judders, then reverse either the motor or the two ends of the feedback pot. If the servo works but is reverse direction, then reverse both the motor and feedback pot end connections while leaving the center connection the same. You could also use channel reversing on the transmitter, if so equipped.
Let me know if there are any questions. Bob
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File Type: jpg CB down.jpg (144.1 KB, 64 views)

Last edited by 67 Mustang; 2015.03.21 at 01:34 PM. Reason: spelling
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Old 2015.03.24, 05:52 PM   #13
67 Mustang
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Steering setup change

Hi everyone, I've been working on the Atomic 2WD steering setup and thought I'd "show and tell". The first mods I made were in the radio setup. On my EX-5 UR, I increased the steering travel to 100% and the steering speed to plus 30. Then I increased the steering curve to plus 50. This gave me much better response and comes close to my MR-03 VE.
Next, I decided to try to eliminate "bump steer" with some changes to the steering mechanics. I removed the stock tie rods and ball ends and inserted a track rod all the way across from one knuckle arm to the other. I luckily found a rod and ball ends in my 450 size helicopter junk box that were the right size. The ball ends were 4mm. instead of 3.5mm. from Atomic but still mounted on 2mm screws. On the left knuckle arm, I used a longer 2mm. screw that would concentrically raise the new tie rod from the servo to the track rod and be parallel to the wishbone. I used the stock Atomic tie rod with a different end from the servo to the track rod. The attached pics hopefully will make this clear.
These changes have really transformed the way the car responds to steering inputs and have made it my new favorite. The adjustment ability of the all independent suspension allow changes to suit track conditions and I really enjoy that. The independent rear suspension really helps keep the rear end of the car "planted" over any bumps. I've noticed that I can take a corner faster now without the oversteer that happens with the solid Mini-Z rear pod and it's large unsprung mass.
Let me know if there are any questions.
Bob
ST-1-down.jpg

ST-2-down.jpg

ST-3-down.jpg

ST-4-down.jpg
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Old 2015.03.24, 05:59 PM   #14
67 Mustang
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Steering change parts

Hi again. I thought I would show the parts removed and the new parts used to accomplish the above changes.
Check out the two pics and it will perhaps be more clear.
The first pics shows the new parts and the second shows the Atomic parts no longer used.
Let me know if there are any questions.
Bob

ST 5 down.jpg

ST 6 down.jpg
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Old 2015.03.25, 11:06 AM   #15
dameetz
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Just want to ask if this car is as loud as their AMZ 4wd car due to gear pitch and its gear reduction system?
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