new ofna DM1 pics and thoughts :):)
#1336
Tech Elite
iTrader: (40)
The issue is the mesh of 1st and 2nd gear. The 2 speed is in a fixed mount, so the spurs are always in the same place. The engine moves on a slot to keep the gears lined up. So you have to have the same small clearance between the two pinions and spurs. If you have too much gap with either, there is not enough surface of the spur gear to hold the pinion. So it wears out quicker.
I'll take a picture of the mesh (nothing on the chassis other than engine and 2 speed) so you can see what happens if you increase or decrease the spur and or pinion.
Using open engines will also wear the gears out faster due to the loading. This is also true with more grip in the track or softer tires. All the load between the tires and engine go through the gears.
I'll take a picture of the mesh (nothing on the chassis other than engine and 2 speed) so you can see what happens if you increase or decrease the spur and or pinion.
Using open engines will also wear the gears out faster due to the loading. This is also true with more grip in the track or softer tires. All the load between the tires and engine go through the gears.
#1337
Tech Addict
Gear mesh is very critical on these cars. I didn't have problems with them in the 3 or more years that I raced the DM1s. But the mesh I left between the spurs and the CB was on the tight side since I was running the Carbon chassis that flexes a bunch. With the King Headz chassis I didn't have any issues since it was stiffer than stock. I used 4 tooth difference and had no problems. I used to do the paper between the spurs and CB but even that was hit or miss due to the torsion of the Carbon chassis so later I did it by feel.
#1340
#1344
Tech Addict
If they are aluminum then they must be made for one of the sedans that OFNA had a few years back. Maybe CD3 or something like that. Didn't try anything like that but maybe they fit.
#1345
Tech Champion
My left front hex is not coming off.. When I turn it with the wrench, it just turns. I held some pliers inside the hub in that little gap at the (wheel) end of the shaft, and was able to get it off. The pin is okay. What's causing this?
Also, what is the best way to access the front diff? Thanks.
Also, what is the best way to access the front diff? Thanks.
#1346
Tech Champion
My left front hex is not coming off.. When I turn it with the wrench, it just turns. I held some pliers inside the hub in that little gap at the (wheel) end of the shaft, and was able to get it off. The pin is okay. What's causing this?
Also, what is the best way to access the front diff? Thanks.
ps The hex on the rim looked okay, but I guess it could be that?.. Too soft, the hub is spinning inside the rim?...
Also, what is the best way to access the front diff? Thanks.
ps The hex on the rim looked okay, but I guess it could be that?.. Too soft, the hub is spinning inside the rim?...
Last edited by Herrsavage; 08-04-2013 at 03:24 AM.
#1347
Tech Elite
iTrader: (40)
My left front hex is not coming off.. When I turn it with the wrench, it just turns. I held some pliers inside the hub in that little gap at the (wheel) end of the shaft, and was able to get it off. The pin is okay. What's causing this?
Also, what is the best way to access the front diff? Thanks.
ps The hex on the rim looked okay, but I guess it could be that?.. Too soft, the hub is spinning inside the rim?...
Also, what is the best way to access the front diff? Thanks.
ps The hex on the rim looked okay, but I guess it could be that?.. Too soft, the hub is spinning inside the rim?...
I purchased my kit as a RTR and had to have another racer point out the allen screew, as the instructions are not really clear.
If you need, pm me and I can take a photo of how the pin is set.
Mark
#1349
Tech Champion
A pic would be great, thanks.. The car seems to work fine was is - but you can't get the wheel off (or all the way tightened) without wedging something into the axle end... The grub screw is in the end of the axle, and all the way tightened. The regular pin in the hub is there too.. I assume though you are talking about something else..