Ofna DM-One Brushless Conversion (DM-1)

[ssspconcepts]

Originally Posted by dangerwr

Thanks! I will let you know once I actually get down to it. I am wondering about that solid center shaft that another member posted the link on Tower or the Spider center diff. Is there an advantage to using a true differential over a solid shaft?

I don't know yet...

My preference is to use either center diffs or trannies with a slipper. Mike's slipperential...when it is released...will do both!

To answer your question...you can simply install the collar that comes with that center solid shaft on the DM-1 stock 2-speed. It should work fine....when you get to that point there are plenty of members here that can help.

[ssspconcepts]

Latest progress:

From DM-1 Spec

From DM-1 Spec

[Arct1k]

Ooooo thats pretty....

I think you need to strip that servo top plate to match and round the edges, add a couple of zip tires and you are all set...

PS you may want to look at a gyro... ;-) (real men cheat)

[ssspconcepts]

Originally Posted by Arct1k

Ooooo thats pretty....

I think you need to strip that servo top plate to match and round the edges, add a couple of zip tires and you are all set...

PS you may want to look at a gyro... ;-) (real men cheat)

Thanks...I have a D-Box gyro that I am planning to take off of one of my trucks. I have my Spek transmitter torn apart now doing the Lipo mod and waiting for the battery to arrive...geesh! The suspense is killin me. I wanna drive this thing...or should I say pilot this thing.

[speedracer1129]

Very Nice!!!!!!!!

[BrianG]

Originally Posted by dangerwr

...I am wondering about that solid center shaft that another member posted the link on Tower or the Spider center diff. Is there an advantage to using a true differential over a solid shaft?

I personally like the solid shaft. A center diff unloads too much and spins the front tires unnecessarily and you lose power. Unless you put really thick oil, and then where is the benefit? Maybe on a track where cornering is vital, but these have so much power that it's easy to drift around the corner if you want to turn tight.

I don't know what benefit a torsen diff (if that's what you mean by "spider") would offer. I can see using it in the front or rear to keep one side from unloading on corners. But the combination of stiff suspension and sway bars helps that a lot. Otherwise, it kinda acts like a solid shaft if used in the center...

[rchippie]

That looks great . I almost got that car instead of my gtp . Does the battery hang of the chassis much ?.

[ssspconcepts]

Originally Posted by rchippie

That looks great . I almost got that car instead of my gtp . Does the battery hang of the chassis much ?.

It is a really nice kit car...I am continually impressed with the quality of the Ofna products that are available. I guess about 1/3 of the battery hangs off the chassis. The is probably too much for your comfort as I recall from your previous posts a long time ago...but the tray is delrin, and this is a street racer, and everything is bolted down nice and tight...

[ssspconcepts]

Originally Posted by BrianG

I personally like the solid shaft. A center diff unloads too much and spins the front tires unnecessarily and you lose power. Unless you put really thick oil, and then where is the benefit? Maybe on a track where cornering is vital, but these have so much power that it's easy to drift around the corner if you want to turn tight.

I don't know what benefit a torsen diff (if that's what you mean by "spider") would offer. I can see using it in the front or rear to keep one side from unloading on corners. But the combination of stiff suspension and sway bars helps that a lot. Otherwise, it kinda acts like a solid shaft if used in the center...

I used 90wt diff fluid (which was the thickest that I had on hand). I am going to try the diff and then try the center spool. I just wish somebody made a heavy duty center slipper to go with that solid shaft....

[rchippie]

Originally Posted by ssspconcepts

It is a really nice kit car...I am continually impressed with the quality of the Ofna products that are available. I guess about 1/3 of the battery hangs off the chassis. The is probably too much for your comfort as I recall from your previous posts a long time ago...but the tray is delrin, and this is a street racer, and everything is bolted down nice and tight...

your probably right . Since it's a onroad car as long as your tray is securly mounted it should be all right .

[BrianG]

Originally Posted by ssspconcepts

....I just wish somebody made a heavy duty center slipper to go with that solid shaft....

Yeah, that would be nice. But believe me, the tires slip enough. Seriously, I don't think the lack of a slipper is a big deal. Other than controlling take-offs, the other use of a slipper I can think of is to absorb drivetrain shocks when landing from jumps. Do you plan to jump this?

Originally Posted by ssspconcepts

The suspense is killin me. I wanna drive this thing...or should I say pilot this thing.

I would love to see the video of this thing move! The snow is here to stay with us in CO for a while but hope to have mine built soon and wait for Spring or the parking lots to finally be cleared!

[ssspconcepts]

Originally Posted by BrianG

Yeah, that would be nice. But believe me, the tires slip enough. Seriously, I don't think the lack of a slipper is a big deal. Other than controlling take-offs, the other use of a slipper I can think of is to absorb drivetrain shocks when landing from jumps. Do you plan to jump this?

Those are good points...no jumps planned for this car. I am going to give it a few runs as is. If it diffs out too much and eats the front tires I will definitely swap for the solid center spool. I just did not want to keep the 2-speed because I NEED reverse and I used all of these parts (center diff) because I had them on-hand.

[speedracer1129]

Originally Posted by ssspconcepts

I used 90wt diff fluid (which was the thickest that I had on hand). I am going to try the diff and then try the center spool. I just wish somebody made a heavy duty center slipper to go with that solid shaft....

Are you sure you used the right oil??? That there is shock oil, no good for diffs!!

[Nuclear]

Hello, winter project. just wanted to know, can you list the price of all your parts you used, including price of the car....esc...motor....etc....


thank you.