Ofna DM-One Brushless Conversion (DM-1)

[ssspconcepts]

Hey all,

I just ordered a DM-1 Spec and some other stuff to begin my build. I am planning to use a MMM, Neu 1515 1Y, and 5S or 4S FP 5000mah. I am looking for recommendations on the following aspects of the build:

1) Should I use the stock 2-speed, 1 speed spool, or center differential? I have a spare set of front/rear/center spider 8 diffs and I am considering using these. What do you think?

2) What gearing do you recommend?

3) What weight diff and shock fluid?

4) Any other misc. recommendations or lessons learned from other BL on-road builders?

I will be out of town for a couple of weeks but will post many pics when I return.

Thanks for taking the time to read and reply.

[rcoverboard]

Looks like Billy has a little compition at the parkinglot races lol.

[speedracer1129]

Originally Posted by ssspconcepts

Hey all,

I just ordered a DM-1 Spec and some other stuff to begin my build. I am planning to use a MMM, Neu 1515 1Y, and 5S or 4S FP 5000mah. I am looking for recommendations on the following aspects of the build:

1) Should I use the stock 2-speed, 1 speed spool, or center differential? I have a spare set of front/rear/center spider 8 diffs and I am considering using these. What do you think?

Definately go single speed! Brushless and 2 speeds do not work to well IMO. The car becomes too uncontrolable and not fun! The easiest thing would be to run the center diff, but JB weld it to make it a solid and you can the Kyosho plastic gears.

2) What gearing do you recommend?
All depends what speed you want...

3) What weight diff and shock fluid?
Again, depends on what you want to do with the car...

4) Any other misc. recommendations or lessons learned from other BL on-road builders?
HAVE FUN!!!!
I will be out of town for a couple of weeks but will post many pics when I return.

Thanks for taking the time to read and reply.

That is what I would do.....

Originally Posted by ssspconcepts

Hey all,

I just ordered a DM-1 Spec and some other stuff to begin my build. I am planning to use a MMM, Neu 1515 1Y, and 5S or 4S FP 5000mah. I am looking for recommendations on the following aspects of the build:

Should I use the stock 2-speed, 1 speed spool, or center differential? I have a spare set of front/rear/center spider 8 diffs and I am considering using these. What do you think?


I will be out of town for a couple of weeks but will post many pics when I return.

Thanks for taking the time to read and reply.

Greetings,

I have been searching the internet for anyone else converting the OFNA DM-1 Spec to brushless. I am planning to do the same this winter! Apparently the drive train is the same configuration as the Jammin' X1 buggy so immediately I thought of Novak's conversion kit. The problem I was wondering was the same as your question #1. What to use for a center diff?

I figured I would use a single-speed and did not know if there was a choice between a solid and a spool. I know OFNA manufactures a single-speed solid diff I believe they use in the Ultra GTP kit setup for dirt oval.

I would love to see pics of your conversion and will subscribe to this thread. I use a Neu 1512 2D and the MMM v3 in a Losi 8ight conversion but was thinking of using the Novak HV 4.5 in the DM-1 spec.

What are your thoughts on the battery tray? I am wondering if I will need to fabricate one or retro-fit the RCPD tray or use the Novak's somehow. The chassis is narrow on the DM-1 and would like to balance everything as best as possible. Cheers!

[ssspconcepts]

Just got a lot of my parts for my DM-1 Spec BL project.

From Revo

Originally Posted by ssspconcepts

Just got a lot of my parts for my DM-1 Spec BL project.

Man, you are so lucky--she is a beauty. How did you choose the spider diffs and will they fit Kyosho spurs?

[_paralyzed_]

Originally Posted by dangerwr

Man, you are so lucky--she is a beauty. How did you choose the spider diffs and will they fit Kyosho spurs?

they are a 6 screw and won't fit kyosho gears, Nice 8spiders man!

[_paralyzed_]

you know those are "ue supermaxx 8 spiders" don't you?

Originally Posted by _paralyzed_

you know those are "ue supermaxx 8 spiders" don't you?

I have no earthly idea what they are but searched on the web and learned OFNA makes the spiders which makes perfect sense!

I will look into the supermaxx guys and learn some more. Thanks for the heads up and am looking to complete a similar conversion soon. I figured I would shoot for something that would accomodate Kyosho spurs but is not that important to me . . .

[BrianG]

Originally Posted by dangerwr

...I figured I would use a single-speed and did not know if there was a choice between a solid and a spool. I know OFNA manufactures a single-speed solid diff I believe they use in the Ultra GTP kit setup for dirt oval...

Yes, there is a single-speed (and two-speed) center "diff" option for the Ultra GTP. The 51T plastic gear attaches to an adaptor plate, and that is secured to the shaft via a 5mm set screw (there is a flat spot o the shaft). Pretty simple and light. Since it uses 51T spurs, so you have to make sure you have enough chassis clearance because of the larger diameter. The bearings for it are different than most true center diff options, but not exactly sure of the exact size off the top of my head.

BTW: The single speed holds up very well to BL power. I've ran a few packs through it and everything is working fine.

Originally Posted by BrianG

BTW: The single speed holds up very well to BL power. I've ran a few packs through it and everything is working fine.

That is good to know. I have never heard of Unlimited Engineering until now. Their diffs are $100 a piece which I can afford (barely!) and judging from their website, get what you pay for, but am still new and learning.

I just finished a Losi 8ight brushless conversion and need something for on-road.

[_paralyzed_]

Originally Posted by dangerwr

That is good to know. I have never heard of Unlimited Engineering until now. Their diffs are $100 a piece which I can afford (barely!) and judging from their website, get what you pay for, but am still new and learning.

I just finished a Losi 8ight brushless conversion and need something for on-road.

ofna 8 spiders and ue 8 spiders are the same thing. UE just renamed them and rasied the price. Buy OFNA 8 spiders off ebay for less than $50

[ssspconcepts]

Just so y'all know...I just got back and tried o drop in the center spider diff with the 46T spur and ran into a few problems:

1) the Jammin CR motor mount doesn't sit quite high enough to accomodate the spur. I have four options to correct this (a) dremel a little material around the chassis spur gear opening (b) try to find a smaller spider spur gear (c) Swap the CR mount for my CRT (d) insert some spacers or washers in between the chassis and center diff assembly

2) The front center dog bone is 88.5mm and the rear center is 104mm. When I switched the 2-speed for the center diff, the front center dog bone was too short. It looks like the 104mm dog bones (front and rear center) would fix this issue.

Brian,
Do you have a link to the center spool you mentioned? Part numbers?

Thanks.

[BrianG]

How about a link: http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXBZN2

It only comes with what is pictured; no bearings or drive cups. The one I got was even missing the 5mm set screw. I hope it was simply missed, because it makes no sense to have it without the screw. It uses the same cups and bearings that the 2 speed uses though...

[ssspconcepts]

Originally Posted by BrianG

How about a link: http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXBZN2

It only comes with what is pictured; no bearings or drive cups. The one I got was even missing the 5mm set screw. I hope it was simply missed, because it makes no sense to have it without the screw. It uses the same cups and bearings that the 2 speed uses though...

THANKS!