Very nice biuld, SSSP!

Alrighty, the Kyosho Inferno GT body finally came in and I measured the wheelbase at just a hair above 13 inches. This tells me that the Inferno GT bodies will fit the DM-1 Spec just fine. Be sure to order GT bodies and not the longer (330mm?) GT2. I do not think any modification is required but will not know for sure since my DM-1 spec is on back order :cry:.

Thanks. Is the GT body made of the thicker/stronger lexan?

Nah, made from the standard stuff. The body is flimsy in some spots and nice and rigid in others. I bet once the wheel wells are cut the whole thing will be a bit on the flimsy side. I wonder if it will buckle from the sheer speed of the brushless? :lol:

Well that is good to know. My stock PF8 body is flimsy but it seems to hold up fine during speed runs.

The PROTOform bodies are .040" inch lexan. I do not have my calipers here at home but I can say that the Kyosho body is not made from anything thicker than what you normally would find. They are expensive too since they are licensed models from real manufacturers.

I think my DM-1 Spec is shipping out tomorrow :party:. Did yours come as a kit or was it 80% assembled?

I was wondering how it all went with your conversion. I flexed my chassis and took out second gear on the spur,,, did you have those problems? I made an upper support to help cure the problem. Mine used to be Nitro, but you can't run it anywhere public cause there loud so I decided if I'm gonna have fun with this I gotta go brushless. I added some Ofna foam trued tires. I also cut my own motor mount. Here is a couple pics of the project.
http://i259.photobucket.com/albums/h...aro/ybnfgh.jpg
http://i259.photobucket.com/albums/h...o/PICT1494.jpg
http://i259.photobucket.com/albums/h...o/PICT1496.jpg

awesome ^^^^^^^^^^

did you true the ofna tires or did they come that way? I'm too lazy...

thanks
Ofna True Blue they call em,,, they're done already. nice and sticky, ofna said they should handle the speed, we'll see, :diablo:

I see I'm not the only one who likes those upper-decks. They really stiffen things up to help prevent flexing at all. Maybe still some torsion flex, but not nearly as much as f/r flex.

That deck should help stripping the spurs, but I would maybe add an extra plate that goes under the motor mount and CD area so stiffen it a bit more. Since the motor mount and CD mounts are not on the same "plane" ANY flexing will eat spurs. Probably why Mike's mounts are so popular...

Nice body on that!

Which body is that? 1/7th??

I just received my DM-1 Spec last night and will be starting my conversion soon. I ordered the Ofna center spool and looks like it is specifically design to fit Ofna's spurs--does anyopne know?

Yes,,it's the DMone Pro Kit....comes with body. Not sure on the spurs,,,but i'm gonna guess, yes.

The Ofna single speed spur setup uses the 51T spurs: http://www.rc-monster.com/proddetail.php?prod=ofn30110

Luckily, I happen to have a few from the old days when using an emaxx tranny with strobe slipper setup was common.

Note about the Ofna single speed kit: It does not come with support bearings or outdrive cups so you need to get those seperate. Also, my kit did not come with the needed grub screw, which is 5mm.

I'm not gonna be needing that stuff, Im using the clutch bell and the two speed trans in my setup with mechanical brake. But thanks anyhow.

Nice rides guys!

Ok. I am up to speed with the 51T spur--I will have to order one (or two!). As far as the center single-speed kit I installed that today (I will post pics soon). I used the center shaft from the 2-speed and seems to work fine--this way the bearings and out drives fit without issue. What is with the missing 5mm set screw? :no:

Thanks for your help. Cheers!

I got a few more things done over the weekend. New Feigao 540XL is the first motor I'm tryin out.(we'll see if it sticks) The stock clutch bell and 2 speed gears are mounted to it. I made the radio tray up to support the receiver, antenna and brake servo also, one bolt and it swivels out for cleaning.:yes:
I'm still waiting on six 30C 5000mah lipo cells to come in the mail. I'm gonna start it out on four cells and see what happens. :whip: I was wondering if anyone out there tried to run the DM brushless with the 2 speed? Any suggests, complains or praises?
I know the one down fall is no reverse, but I'm not sure how important that will be for parking lot racing. Thanks for comments and suggestions in advance.
http://i259.photobucket.com/albums/h...o/PICT1538.jpg
http://i259.photobucket.com/albums/h...o/PICT1539.jpg
http://i259.photobucket.com/albums/h...o/PICT1541.jpg

I have yet to hear of anyone running a 2-speed brushless on the DM-1. When I was building my Super RS4 (EP) I heard a few people talking about using the 2-speed from the Nitro version. What I gathered was that there was little need since the electric motor has a flat torque curve and would not benefit much from the 2-speed. I do not know personally but will be interesting to hear how yours works out with the 2-speed.

If you have the room I would think a 2-speed on a larger 1/7th scale would be fun. How do these things shift? Do they use some type of centrifugal clutch mechanism that switches out at a certain RPM?

exactly, a centrifugal clutch and a one way bearing. when the second speed hits and overrides the first, the first just spins freely because of the one way

The dude who started this post was using a 2 speed, but he din't reply as of yet. One certain benefit would be torque curve, if you could keep it hooked up.

Still running the 2 speed in mine. Works great. RCMonster even makes a 2 speed pinion adapter now so you dont have to make your own like I did back then.

RCmonster Mike built an InfernoGT last fall and used the 2 speed also.


EDIT: In post number 85 in this thread there is a short video of the car running and you can hear it shift. The pitch of the motor and gears changes when it shifts. Its like a little turbo boost kicking in.

A couple of photos of the DM-1 Spec conversion . . .
 

Here we have my latest creation. I am using the solid spool with the center shaft and out drives from the 2-speed. Also, I started with a Novak conversion kit but am abandoning this idea for a RCPD top plate and motor mount with a RC-Monster battery tray.

My current plan is to use a MMM v3 :sarcastic: and a Neu 1512 1.5D/F. I think I will gear this 3300Kv motor at 14/51 on 4S to start and see how things go. Hopefully they go fast!

Oh well, it will be several weeks for the RCPD stuff to get here so this will be it for a little while. I might anodize the parts red if I can piggy-back an order from work. Cheers!

http://i88.photobucket.com/albums/k1...C/100_4915.jpg

http://i88.photobucket.com/albums/k1...C/100_4918.jpg

http://i88.photobucket.com/albums/k1...C/100_4917.jpg

I made my pinion adapter also. I probably would not have bought it even if I knew about it.....I'm into the fabrication end of this hobby. I also made the top plate and motor mount. It's cool to hear your not having problems with the 2 speed,,, that was a concern when I started this project. I watched your video, very nice...looks like it works great!

Nice start man! Keep the pics coming.

Brushless OFNA DM-1 SPEC: Flightpower 5S 5000mah (25C) Battery, Mamba Monster Speed Controller, Neu/Castle 1515 2200kv motor, 51T Mod1 Spur gear, 25T Mod1 pinion (I know this is too big...but its fast as heck and fun), and Spider Eight 43/13 ring and pinion differentials.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 51
Pinion Tooth Count: 25
Total Voltage: 18.5
Motor KV: 2200
Tire Diameter (inches): 4.17
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.006
Spur/Pinion Ratio: 2.04 : 1
Total Ratio: 6.74769 : 1
Tire Circumference (inches): 13.1 inches (332.75 mm)
Total Motor Speed: 40700 RPM
Vehicle Speed: 74.83 mph (120.2 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

As promised here is my amature video...

<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/PA-RFKZg02A&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/PA-RFKZg02A&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>

Here are the latest pics with the one speed direct drive installed.

<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/B-9EeARPZkoEcOyOYhLtHQ?feat=embedwebsite"><img src="http://lh6.ggpht.com/_Go2PcH5NPr4/SXOwiiCkS5I/AAAAAAAAC3E/vRxRO6T0JN4/s800/SANY0171.JPG" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/ssspconcepts/DM1Spec?feat=embedwebsite">DM-1 Spec</a></td></tr></table>

<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/EQhSUDJrMVXc60qfh-jq0A?feat=embedwebsite"><img src="http://lh6.ggpht.com/_Go2PcH5NPr4/SXOwk42r0qI/AAAAAAAAC3M/QghrQ4Ja4uU/s800/SANY0172.JPG" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/ssspconcepts/DM1Spec?feat=embedwebsite">DM-1 Spec</a></td></tr></table>

Man that thing is fast--looks very powerful on the 5S. Do you think it is capable of going 70mph with your current setup? I can not wait to finish mine up!

The calculations say it is possible to go 70+mph:surprised:...but I never could get it up to full throttle because the tires constantly break loose. Towards the end of the video there were a couple of passes where I was close to full throttle but not quite. I absolutely have to get a radar gun. I keep talking about it but I keep spending my $$$ on car parts!

By the way...I see some other folks on here are installing one-speed centers. This was a PITA to keep the DM-1 center shaft from sliding back and forth because there aren't any bearing stops milled into the shaft. Brian helped me come up with the idea to make a shim using 8.1mm inner diameter stainless steel tubing and a couple of 8.1mm innerdiameter washers. It worked like a charm. I still have some of that tubing if anybody needs it. If you order it from onlinemetals.com they charge an arm and a leg for shipping.

I bought one of those Hotwheels radar guns off eBay for $20 and works pretty good! I am going to gear mine around 60mph at first and see where the temps are with my driving style.

Now, on the solid center spool I wound up using the center shaft and outdrives from the 2-speed that came with the car and not the little kit. Did you do the same or did you do something different?

Yep...had to use the 8mm DM-1 Spec center shaft...that's why you will need the 8.1mm inner diameter steel tubing.

I see--would you mind sending me PM with how much you would like for some of the 8.1mm tubing? I might have some in our machine shop at work but highly doubt it will be the exact size. Just let me know . . .

[QUOTE=ssspconcepts;253388]Brushless OFNA DM-1 SPEC: Flightpower 5S 5000mah (25C) Battery, Mamba Monster Speed Controller, Neu/Castle 1515 2200kv motor, 51T Mod1 Spur gear, 25T Mod1 pinion (I know this is too big...but its fast as heck and fun), and Spider Eight 43/13 ring and pinion differentials.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 51
Pinion Tooth Count: 25
Total Voltage: 18.5
Motor KV: 2200
Tire Diameter (inches): 4.17
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.006
Spur/Pinion Ratio: 2.04 : 1
Total Ratio: 6.74769 : 1
Tire Circumference (inches): 13.1 inches (332.75 mm)
Total Motor Speed: 40700 RPM
Vehicle Speed: 74.83 mph (120.2 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

As promised here is my amature video...

What tires did you use for this run? Car looks fast fast fast!!! nice...Now to get it to stick to the road might be a challenge with all that power.

I actually used the stock treaded tires and wheels that came with the car. I am hoping that this summer (when it is 100+ degrees outside) that the tires will stick better.

I bought some Kyosho slicks myself but have yet to try them but they are very sticky! Kyosho makes them in 3 different durometers--45, 55 and 60 Shore A. I put some on the roller and the car literally sticks to what ever surface I place it on (aside from the carpet!). I think these tires are going to be the best bet for getting these cars to hook-up.

ahh, yes heat will help. Those are the saem tires that came on my gtp,,They are ok,,,but I wasn't to happy myself. I'm tryin out the foams on my DM hoping for better results......Was that an actual torque roll at the end of the video?

Yes. Both rolls in the video were due to mashing the throttle. Let me know how the foams work out. Seems like they would wear out fast...but I can see that they will probably stick better.

What/who makes that spool?

And any tips on building this puppy up? My buddy is building one currently, and wants a speed machine, CC combo, 220 KV, 5s, and a zippy 4000 mah batt

Ofna makes the center spool. There is a picture and part# back around page 8 or 9. Let me know if you can not find it and I will look it up . . .

If you want a single speed center, then you will need these parts. You can either buy them separately or use parts from the stock 2-speed to build the center:
http://www.nitrohouse.com/catalog/pr...ducts_id=12086

http://www.nitrohouse.com/catalog/pr...ducts_id=11306

http://www.nitrohouse.com/catalog/pr...ducts_id=11016 (you can ditch the shaft that comes with the silver aluminum spur mount)

http://www.nitrohouse.com/catalog/pr...ducts_id=10760

http://www.nitrohouse.com/catalog/pr...ducts_id=12091

You will also need a 13mm long piece of 8.1mm inner diameter steel tubing and a couple of 8mm steel washers because the 8mm center drive shaft does not have bearing stops milled on it to prevent the shaft from sliding back and forth.


BTW...this thing is nuts on 5S. I had a hard time keeping the tires from spinning with my 5S/2200kv. I couldn't imagine 6S.

Guys,

Today I received the top plate from RCPD and does not seem to fit too well. The top plate is from the E-Jammin' kit to the best of knowledge. Now I know I can easily modify the plate to fit but I have some concerns since I also ordered the motor plate. Ofna says the DM-1 Spec drive train is based off the Jammin', correct? Here are some pictures below--let me know what you think.

http://i88.photobucket.com/albums/k1...C/100_4995.jpg

http://i88.photobucket.com/albums/k1...C/100_4999.jpg

I really like the plate because you can arrange it to have the ESC close to the front as well :intello:.