Like Tree205Likes

Tamiya TB Evo 8

Old 08-02-2023, 06:08 PM
  #256  
Tech Apprentice
 
Join Date: Feb 2017
Posts: 88
Default

Originally Posted by hotdognobun
Both my front blades gave out during a shakedown. I guess after 13 packs on 17.5 it was bound to happen. Thanks for the link it actually got me up and running for tomorrow. Have you had the blades go out in the rear yet?
From my calculations, I have ran over 200 packs (21.5 though) and I am still on the original set of rear out drive / blades. Cannot say the same for the front. At the same time I have broken 3 front arms and gone through 6 packs of the uprights. I am now using the 420 C parts upright (51638), it seems to be made out of a stiffer more brittle plastic. The bearing seems to have a better fit too.
200sxr is offline  
Old 08-03-2023, 11:18 AM
  #257  
Tech Fanatic
iTrader: (32)
 
hotdognobun's Avatar
 
Join Date: Sep 2009
Location: San Diego
Posts: 872
Trader Rating: 32 (100%+)
Default

Originally Posted by 200sxr
From my calculations, I have ran over 200 packs (21.5 though) and I am still on the original set of rear out drive / blades. Cannot say the same for the front. At the same time I have broken 3 front arms and gone through 6 packs of the uprights. I am now using the 420 C parts upright (51638), it seems to be made out of a stiffer more brittle plastic. The bearing seems to have a better fit too.
I will definitely give those a try have that carbon reinforced color to them. Love Tamiya compatibility from other kits
hotdognobun is offline  
Old 08-03-2023, 11:20 AM
  #258  
Tech Fanatic
iTrader: (32)
 
hotdognobun's Avatar
 
Join Date: Sep 2009
Location: San Diego
Posts: 872
Trader Rating: 32 (100%+)
Default

Originally Posted by hipwell
25.5? That's unheard of over here, must be slow as hell?

For 13.5 I run 5.0, and 17.5 run 4.6, sorry cant help with 25.5.

I think 25t is the VTA class which look pretty quick but the tires they use makes the car so squirrelly lol. Let me ask what gearing/FD they are running
hotdognobun is offline  
Old 08-06-2023, 03:36 AM
  #259  
Tech Apprentice
 
Join Date: Feb 2017
Posts: 88
Default

Originally Posted by Bonezero
What gearing are sweet spot for 25.5TC?
I run with 21.5T here in Aus. The FDR we run with is between 3.4-3.8 pending on motor and track. So I guess with the 25.5T would be lower. I use a 59 teeth spur.
200sxr is offline  
Old 08-06-2023, 12:49 PM
  #260  
Tech Regular
 
Join Date: Nov 2014
Posts: 304
Default

Originally Posted by 200sxr
From my calculations, I have ran over 200 packs (21.5 though) and I am still on the original set of rear out drive / blades. Cannot say the same for the front. At the same time I have broken 3 front arms and gone through 6 packs of the uprights. I am now using the 420 C parts upright (51638), it seems to be made out of a stiffer more brittle plastic. The bearing seems to have a better fit too.
I thought the kit evo ones were the same as the 420 ones? It's the same part number in the evo 8 manual. Mine have been pretty reliable, managed to break one of the arms which screw onto the rear uprights so replaced it with a carbon arm from a 420 and its been fine since.
hipwell is offline  
Old 08-08-2023, 02:43 PM
  #261  
Tech Adept
 
zuqbu's Avatar
 
Join Date: Jul 2020
Posts: 136
Default

All this talk about wearing out blades made me double check my car tonight, and I have no signs of wear or tear on any of them – neither front nor rear. Also no sign of any play between the joints. Is it the torque of a 21.5 motor that is destroying them or what? My car is well beyond 100 runs on a 17,5T motor with a FDR of 6.5. I usually stock up on a lot of parts for any runner but I haven't had to replace anything yet in the TB-EVO 8 yet (luckily).
h2e and BuggyFan21 like this.
zuqbu is offline  
Old 08-10-2023, 01:54 AM
  #262  
Tech Master
 
Join Date: Dec 2004
Posts: 1,273
Default

Originally Posted by zuqbu
All this talk about wearing out blades made me double check my car tonight, and I have no signs of wear or tear on any of them Ė neither front nor rear. Also no sign of any play between the joints. Is it the torque of a 21.5 motor that is destroying them or what? My car is well beyond 100 runs on a 17,5T motor with a FDR of 6.5. I usually stock up on a lot of parts for any runner but I haven't had to replace anything yet in the TB-EVO 8 yet (luckily).

Tamiya been making shaft cars forever. I believe the complaining about worn blades and gears are just rookies with shaft drive cars. And most likely built the cars wrong. Canít have slop. And you canít build a Tamiya shaft car with kit shimming. You have to take extra care in shimming every part of the driveline to be free without any slop. Or youíll break gears.
Raman, gwhiz, Eotz and 2 others like this.

Last edited by Juan Aveytia; 10-11-2023 at 10:25 PM.
Juan Aveytia is offline  
Old 08-10-2023, 03:28 PM
  #263  
Tech Regular
 
Join Date: Nov 2014
Posts: 304
Default

Originally Posted by Juan Aveytia
Tamiya been making shaft cars forever. I believe the fee that are complaining about worn blades and gears are just rookies with shaft drive cars. And most likely built the cars wrong. Canít have slop. And you canít build a Tamiya shaft car with kit shimming. You have to take extra care in shimming every part of the driveline to be free without any slop. Or your break gears.
The blades we are talking about are nothing to do with it been a shaft car, they also use the same blades on the 420 which also had similar issues and tamiya revised the new the LF dogbones with longer pins to fit the blades better when the 420x was released.

your right though, kit shimming on the crown and bevel gears is useless and needs correcting before you run
hipwell is offline  
Old 08-10-2023, 04:28 PM
  #264  
Tech Fanatic
iTrader: (32)
 
hotdognobun's Avatar
 
Join Date: Sep 2009
Location: San Diego
Posts: 872
Trader Rating: 32 (100%+)
Default

Originally Posted by Juan Aveytia
Tamiya been making shaft cars forever. I believe the fee that are complaining about worn blades and gears are just rookies with shaft drive cars. And most likely built the cars wrong. Canít have slop. And you canít build a Tamiya shaft car with kit shimming. You have to take extra care in shimming every part of the driveline to be free without any slop. Or your break gears.


Guess Tamiya needs to put in more R&D in their shaft cars since my base build was what their instruction recommended.

Last edited by hotdognobun; 08-10-2023 at 04:45 PM.
hotdognobun is offline  
Old 08-11-2023, 07:39 AM
  #265  
Tech Master
 
Join Date: Dec 2004
Posts: 1,273
Default

Originally Posted by hipwell
The blades we are talking about are nothing to do with it been a shaft car, they also use the same blades on the 420 which also had similar issues and tamiya revised the new the LF dogbones with longer pins to fit the blades better when the 420x was released.

your right though, kit shimming on the crown and bevel gears is useless and needs correcting before you run

Iím a long time Tamiya racer. Never had problems with the blades youíre talking about. Iíve seen people narrow the car too much and the blades get too tight and jammed in the diff. I wonder if thatís what is happening to some of you. And the same goes for making the car too wide. The blades can pop out

Last edited by Juan Aveytia; 08-29-2023 at 01:51 AM.
Juan Aveytia is offline  
Old 08-11-2023, 07:44 AM
  #266  
Tech Master
 
Join Date: Dec 2004
Posts: 1,273
Default

Originally Posted by hotdognobun
Guess Tamiya needs to put in more R&D in their shaft cars since my base build was what their instruction recommended.

The manuals are close. But not even close to perfect. Maybe if all the gears were made of metal. But theyíre plastic. Iíve owned a few Tamiya shaft cars Evo2, evo3, evo4,evo5, tb02,tb04
Juan Aveytia is offline  
Old 08-11-2023, 02:20 PM
  #267  
Tech Fanatic
iTrader: (32)
 
hotdognobun's Avatar
 
Join Date: Sep 2009
Location: San Diego
Posts: 872
Trader Rating: 32 (100%+)
Default

Originally Posted by Juan Aveytia
The manuals are close. But not even close to perfect. Maybe if all the gears were made of metal. But theyíre plastic. Iíve owned a few Tamiya shaft cars Evo2, evo3, evo4,evo5, tb02,tb04

Those were great kits you had I always wanted the Evo 3 Surikarn edition.
hotdognobun is offline  
Old 08-25-2023, 04:40 AM
  #268  
Tech Regular
 
Join Date: Nov 2014
Posts: 304
Default

I'll be running 17.5 next week when I get back from holiday. Bought a surpass v6. Got a feeling this evo will be a bit of a monster in 17.5 with the drivetrain being so free.
hipwell is offline  
Old 08-25-2023, 02:29 PM
  #269  
Tech Fanatic
iTrader: (32)
 
hotdognobun's Avatar
 
Join Date: Sep 2009
Location: San Diego
Posts: 872
Trader Rating: 32 (100%+)
Default

Originally Posted by hipwell
I'll be running 17.5 next week when I get back from holiday. Bought a surpass v6. Got a feeling this evo will be a bit of a monster in 17.5 with the drivetrain being so free.

Been running 17.5 with 4.0 to 4.5 FD. Chassis handles it so well
hotdognobun is offline  
Old 08-27-2023, 12:13 PM
  #270  
Tech Regular
 
Join Date: Nov 2014
Posts: 304
Default

Yeh im curious as to what fdr to start with. I was going to go for 4.6, but feel that the evo with such a free drivetraine might actually be better with like 4.4

I've ordered spur gears to get me from 4.4 to 4.8 so I can have a play. Might start at 4.4 and monitor temps from there

Most guys at our club with xrays, mugens etc seem to be running around 4.5, but i recon the evo is more efficient so might get away with going lower
hipwell is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.