Ofna DM-One Brushless Conversion (DM-1)

[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.