Ofna DM-One Brushless Conversion (DM-1)

[ssspconcepts]

Originally Posted by dangerwr

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...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.

Originally Posted by ssspconcepts

The calculations say it is possible to go 70+mph...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?

[ssspconcepts]

Originally Posted by dangerwr

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.

Originally Posted by ssspconcepts

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 . . .

[SpeedAssault]

Originally Posted by ssspconcepts

The calculations say it is possible to go 70+mph...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.

Hey That is a beautiful car Great pics, enjoyed reading

I am blown away that with a ratio of 6.7, a 51spur and 25 pinion that you still have a hard time doing full throttle.!and end up torque fliping
maybe you could move the motor forward ...
whats the weight?

The video was cool,looks like you need a circle track. definitely shows the power and speed, amazed to see it flip
Looks like I'm going to mount my motor in front

Thank you for posting video , I was going to run a 10:1 ratio but going to change to 5 or 6:1. although it's 9lbs and 21" wheels base X 15" wide so there shouldnt be any torque flippin
wish you were closer so we could race, when mine gets done that is


still working on it, needs a motor mount and tire adapters for the 1/5 but also make it easy to put on 3.2 wheels for the offroad stuff

again great build thread
Sweet ride, cant wait to see a new body on it, keep it coming

[Ryu James]

great looking conversion. i converted a 1/8 Schumacher last fall and it turned out ok and was fast but it just didnt have the durability of the Ofna or Kyosho stuff. I have been wanting to do a road car like this but wondering if anyone can tell me what is the major difference between the Ofna DM-1 and the Kyosho Inferno. Is one better than the other?

My neighbor has a Inferno GT that he brought over to me. he cant get it to work and he loves my brushless stuff so he said i could turn it electric if i want. i just have to pay for it and then we would "share" the car but he doesnt really do anything with RC. i have everything i need to do the conversion so i am thinking it will be my next project. this is a great thread for tips on converting one of these on roaders.

any suggestions from some of you who have already gone this route. i notice alot of people converting the Ofna cars but not the Inferno. is there a reason for this?

Originally Posted by Ryu James

great looking conversion. i converted a 1/8 Schumacher last fall and it turned out ok and was fast but it just didnt have the durability of the Ofna or Kyosho stuff. I have been wanting to do a road car like this but wondering if anyone can tell me what is the major difference between the Ofna DM-1 and the Kyosho Inferno. Is one better than the other?

My neighbor has a Inferno GT that he brought over to me. he cant get it to work and he loves my brushless stuff so he said i could turn it electric if i want. i just have to pay for it and then we would "share" the car but he doesnt really do anything with RC. i have everything i need to do the conversion so i am thinking it will be my next project. this is a great thread for tips on converting one of these on roaders.

any suggestions from some of you who have already gone this route. i notice alot of people converting the Ofna cars but not the Inferno. is there a reason for this?

When I read this thread and began my conversion I learned that the DM-1 cars were a little more purpose-built for on-road. The Inferno is a good option but is essentially a buggy chassis. The DM-1 cars use different suspension geometry that offer better handling. That is my $.02.

I am currently selling my OFNA DM-1 Spec brushless conversion. I have everything required to complete the conversion but got into racing 1/8th scale off-road (brushless, of course). Email me if interested . . .

[Ryu James]

Originally Posted by dangerwr

When I read this thread and began my conversion I learned that the DM-1 cars were a little more purpose-built for on-road. The Inferno is a good option but is essentially a buggy chassis. The DM-1 cars use different suspension geometry that offer better handling. That is my $.02.

I am currently selling my OFNA DM-1 Spec brushless conversion. I have everything required to complete the conversion but got into racing 1/8th scale off-road (brushless, of course). Email me if interested . . .

right on. at the moment every penny is going into my 1/5 project but thanks for the info.