Tamiya F104 Pro!
#6634

Had the same problem with a superstock 21T brushed.
When exiting the corner you could here the diff slipping.
I put in a F103 set in there and it works like a charm
Super smooth but good traction even with a 17.5 LRP with no timing
Pack the trust bearing(one piece) with silicon diff grease or black grease and the thrust springs)( like in the F103 manual
Sand the diff rings with 600 wet paper not a higher grade.
Sand them wet.
This will give a rougher finish and a better working diff.
I presumme you use ceramic balls in there?
regards Roy
When exiting the corner you could here the diff slipping.
I put in a F103 set in there and it works like a charm
Super smooth but good traction even with a 17.5 LRP with no timing
Pack the trust bearing(one piece) with silicon diff grease or black grease and the thrust springs)( like in the F103 manual
Sand the diff rings with 600 wet paper not a higher grade.
Sand them wet.
This will give a rougher finish and a better working diff.
I presumme you use ceramic balls in there?
regards Roy
#6636
Tech Regular
iTrader: (19)

I've tried all sorts of diffs that this works great on... some just work best when you ignore the manual

#6637
Tech Addict

Beside the Tamiya spur, what other barand of spur I can use in F104? I think the stock spur does not hold enough balls for fast motor.
#6642

I ran both my 104 and my X1 at the TCS finals, I ran the fully hopped up 104 first and then the X1, and once I put the X1 on track the other 104 never turned a wheel the rest of the weekend. The X1 is much more settled, I could clip the curbing on the TAMIYA track and it wouldn't get all out of shape. I am not sure about the X1 on carpet though, I think it will need to be freed up a bit to be fast. On carpet it may have too much side bite and lose some of its ability to rotate properly.
I ran both my 104 and my X1 at the TCS finals, I ran the fully hopped up 104 first and then the X1, and once I put the X1 on track the other 104 never turned a wheel the rest of the weekend. The X1 is much more settled, I could clip the curbing on the TAMIYA track and it wouldn't get all out of shape. I am not sure about the X1 on carpet though, I think it will need to be freed up a bit to be fast. On carpet it may have too much side bite and lose some of its ability to rotate properly.
regards
Oortael
#6643
Tech Apprentice

I just use standard touring car spurs. The holes are just a little small for the ball bearings so I have a drill piece that takes the holes out a poof-tenth, just enough for the ball bearings to fit properly. Also I use my dremel to take some width from where the ball bearings go through to make them work properly. Then you can just use standard setup. Plus these spur gears are cheap as chips and easy to come by. Doing this works exactly the same to.
#6644

I think the only difference between the Pro and X1 is weight balance and chassis flex. Add a steel axle to the Pro, some lead weights near the battery, and you will have an X1. Plus no ugly damper sticking out of the body
