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News and reviews of RC Rock Crawling Spots, Rigs and Gear

Wow! 5 years. RC Crawler has been a driving force behind the explosion of RC Crawling. To help celebrate their 5th birthday a bunch of the vendors who post to the RC Crawler Forum are doing give aways.

Note: you must have a star to enter!

Here are the current giveaways posted at rccrawler.com/forum.
CrawlerGraphics, GenkiDoriDori, Crawford Preformance Engineering, Fubar Crawlers, Fubar Crawlers, Fubar Crawlers, Fubar Crawlers, Taylors hobby Products, Taylors hobby Products, The Real Dogman, Jetboat, MaxAmps, RCC Star, RCC Hoodie, Holmes Hobbies, RCC T-shirt, RCC T-shirt, Death metal Garage, T1e RC, SAC Racing, Mayhem ENG., RC Bros., Hackers Racing, RC4WD, Losi, JPCustomsRC, MaxAmps, DNA R/C, JConcepts, JConcepts, RCPCrawlers, Createacrawler, RPP Hobby, RPP Hobby,

We finished up the first Mini Speedway Indoor Crawling Series the Saturday before Christmas with 2 different comps. We ran the 2 courses planned for that week and then ran 2 more to make up for the week we missed a few weeks back.

We ended up running 5 comps for the fall series and had either 3 or 4 drivers at each event. While I had planned 6 events we were happy to get the 5 in we did.

For the first comp of the day Slick and I ran my new DMG NAT while Gozer ran his Modded Losi MRC. Here is how it ended up:

Schmenzer 41
Gozer 49
Slick 73

For the Second Comp Slick and I switched to my more proven modded Losi MRC. While Gozer kept at it with the Bronco-bodied MRC. Here is how that one ended up:

Slick 12
Schmenzer 25
Gozer 37

For a comparison of the DMG NAT and the modded MRC I can say that I like both and there are a few things about each that I like more than the other but in the end steering precision and side hilling ability have me weighing in slightly in favor of the NAT. It does need some shock work which is fine because I broke one anyway. With some work in this area and a slightly higher ride height I think the NAT will be a killer ride and I LOVE the way it looks.

Standings after 4 events looked like this:

38 Schmenzer
28 Gozer
24 Slick
10 OICU812

For the whole season, after event 5 here is how the standings shook out.

46 Schmenzer
34 Gozer
34 Slick
10 OICU812

Well, I didn’t really have a plan for a tie but here is how the two contenders finished:

slick 3-3-3-3-1

gozer 4-2-2-2-3

Congratulations guys. I’m looking forward to 2009!

Eritex manufacturers a wide variety of beadlock wheels for your 1.9 or 2.2 rc rock crawler and are available in Black Delrin or White, Dyeable Delrin with steel rings and either black oxide or stainless hardware.

For my DMG NAT 1.9 Comp Class Tuber I got the wider offset MRC wheels to give my rig a wider stance and dyed them with orange Rit Dye. They turned out great! In addition to looking great they are a couple of ounces heavier per wheel than the stock Losi wheels. All the better for getting the CG on my rig lower.

If you have a custom requirement give Eritex a shout. They offer custom services!

http://eritexinc.com

Losi’s 1 Piece Rear Hub upgrade in Grey anodized aluminum also includes a solid steel axle set for the Losi Mini Rock Crawler.

This upgrade replaces the stock ball joint rear drive with a solid shaft. Use the old ones as spares for the front! Of course the solid shaft takes away the easy to do 4 wheel steer that the stock rig is set up for but this is a Comp Rig and 4WS isn’t legal so in this case the other added benefits are worth the replacement.

Stock MRC rear hub on the left and udgrade on the right

Losi stock axle on top and upgrade on the bottom

In addition to the axle upgrade the aluminum hubs offer more clearance with a more svelte form and recessed screws that are more out of the way than the standard rear hubs.

Stock Losi MRC rear hubs

Here you can see the better clearence offered by the upgrade hub

This upgrade is a bit spendy but the quality is great and, for comp rigs, worth it!

Losi Part Number LOSB1423

Mounting the ESC, Receiver and Battery

For now I am using stock Losi electronics but I may end up upgrading down the road.

There is some decent room in the NAT for electronics but a bit of planning made things go easier. After trying components in different spots I basically decided to go with a similar set up to the one I am using on my modified stocker.

The stock Losi ESC is mounted on the rear 3-link using my now standard G-erber link tray.

The factory Losi Receiver is mounted on the rear axle using the servo mount with the switch on the small shelf in the “rear window”

Electronics mounted towards the rear

Battery mounted on the front 3 link

I am using a 7.4V 2S 1000mAh LiPo mounted on another G-erber tray on the front 3-link.

The components are a fairly tight fit but everything seems to move freely and smoothly.

I’ve been driving the NAT on the Mini Speedway indoor course and it seems to work very well. I need to work more on the shocks but will wait until the Losi aluminum shocks are available. I want to either buy or make a skid plate that moves the lower links more inboard and find some smooth lower links; maybe Delrin.

The NAT with my modified Losi MRC

Driving indoors at Mini Speedway

Indoor course driving at Mini Speedway

I worked more on the NAT today and it was time to get the steering squared away.

Here are the parts I used for the servo mount:

Axial Aluminum tray from a Scorpion
3 Racing Aluminum Servo Posts
Kyosho Mini-Z Wheel Bushings as spacers under the tray

First up was modifying an Axial Scorpion servo plate to use with the JR ST-126MG servo. I use this servo on my 2.2 rig before I picked up a JR 8711 for it and it was pretty decent on that rig so I am sure it will be fine on the NAT. The servo puts out 142 ounces at 6 volts. I am probably going to get a BEC in case this thing stresses the stock ESC too much. We will see how it goes.

I screwed the Scorpion plate down to a chunk of 2×4 so it would stay put while I drilled and countersunk the MRC holes. I simply used the stock mount as a pattern.

Scorpion mount screwed to a chunk of wood

Customized mount ready to install

I installed the mount to the axle using some Kyosho Mini-Z spacers to raise the plate a bit.

See the Kyosho spacers?

I used 3 Racing servo posts to screw the JR ST126MG to.

Before I get to the electronics I had to finish up the steering. I used Cody’s stainless steering rods and parts from the stock drag link.

Stock parts with the new stainless replacements

I simply cut the ends off to length and bored out a hole to thread the stainless steel rod into. I measured a 95mm spacing on the main drag link. Good to know if you want to retain the stock toe. Of course you can adjust the toe with the threaded rod but, for me, stock seems fine. The stock steering ends are nice and strong and since I didn’t have any of the link ends to do this right this seemed like it would work fine. And it does! The stainless links give good clearance and take the torque of the JR servo fine.

Modified drag link

Servo installed and steering links attached

Even though I actually got my DMG Alluminiti before this NAT I went to work on the NAT first because I had all the parts availability.

This orange and black beauty is 4-5/8 ounces stripped of components and is ready to install the components.

The parts I am using for now:

• Losi MRC Axles, Transmission, Upper and Lower Links
• Stock MRC Shocks
• Internal Pen Springs for the Shocks
• Losi ESC and Receiver
• Stock Losi Motor
• JR-Servo High-Torque ST126MG
• Eritex Delrin Wheels in a wide offset and RIT dyed orange.
• Front wheels have Blue Compound Losi Mini Rock Claws weigh 6-7/8 ounces
• Rear wheels have Blue Compound Losi Mini Rock Claws weigh 5-3/4 ounces
• Axial Aluminum tray from a Scorpion
• 3 Racing Aluminum Servo Posts
• Kyosho Mini-Z Wheel Bushings as spacers under the tray

These parts will give me a good start but I do have some replacement ideas for the future.

Here is a shot of the DMG NAT with my Alluminiti that I am still gathering parts for.

The NAT with big brother Alluminiti

After taking the stock MRC apart. I flipped the tranny around when I installed the skid plate in the new NAT chassis.

I originally had a Holmes Mini Torquemaster installed but later switched back to a stock motor for now.

I decided to start with a semi droop setup since I had the stock shocks and I like the way the black shocks look plus, after setting up the shocks I think they might work well. We will see. I used 50 wt Losi oil and some short pen springs inside the shock bodies.

The links mounted up and ready for shocks

Eritex wheels, blue Mini Claws and orange Rit dye make for some cool wheels!

Shocks mounted up

Looks like a good amount of travel