R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 09-18-2013, 11:12 PM   #121
Tech Master
 
Join Date: Jul 2007
Posts: 1,299
Default

If it cannot run blinky gear ratios, tamiya just shot themselves in their foot.
redbones is offline   Reply With Quote
Old 09-19-2013, 12:19 AM   #122
Tech Master
 
Sith Lord's Avatar
 
Join Date: Dec 2007
Location: Canberra, ACT, Australia
Posts: 1,398
Trader Rating: 21 (100%+)
Default

Quote:
Originally Posted by redbones View Post
If it cannot run blinky gear ratios, tamiya just shot themselves in their foot.
Agree. I'd be keen to give this chassis a go, just to be different, but it would have to get to about that below I reckon...... The high internal ratio could stuff it up. Most modern touring cars are around 2.0 these days. Do they have aftermarket gears that you could use?

Quote:
Originally Posted by CraigMBA View Post
I've gotten a TB-03 down to 3.2 (72/55) and I know I can get as big as a 59 in there.
__________________
Tamiya XV-01 Rally :: Tamiya FAV 2011 :: Proline Pro2 SCB

Last edited by Sith Lord; 09-19-2013 at 12:29 AM.
Sith Lord is offline   Reply With Quote
Old 09-19-2013, 01:55 AM   #123
Tech Regular
 
TB03Racer09's Avatar
 
Join Date: Mar 2011
Location: Sydney Australia
Posts: 408
Trader Rating: 1 (100%+)
Default

I'm hoping gearing it for 21.5t/13.5t won't be harder than a new pinion and spur gear. If we can't get it low enough, why don't we increase the motor mechanical timing to compensate?
TB03Racer09 is offline   Reply With Quote
Old 09-19-2013, 03:50 AM   #124
Tech Master
 
Sith Lord's Avatar
 
Join Date: Dec 2007
Location: Canberra, ACT, Australia
Posts: 1,398
Trader Rating: 21 (100%+)
Default

Quote:
Originally Posted by TB03Racer09 View Post
I'm hoping gearing it for 21.5t/13.5t won't be harder than a new pinion and spur gear. If we can't get it low enough, why don't we increase the motor mechanical timing to compensate?
Because everyone else in their Xray's, TRF's, HB's, etc has already increased their motor timing too. So you're still way behind.
__________________
Tamiya XV-01 Rally :: Tamiya FAV 2011 :: Proline Pro2 SCB
Sith Lord is offline   Reply With Quote
Old 09-19-2013, 05:47 AM   #125
Tech Elite
 
Join Date: Sep 2008
Location: Ashland city tn
Posts: 2,557
Trader Rating: 49 (100%+)
Default

http://www.tamiya-model.com/shop/tam...-90063614.html

ive bought a lot of stuff from them ....just have to pay a little in shipping...I do always get tracking and use paypal just in case ...one order was over $300


just gave up my secret go to site now i wont be able get one
__________________
Rick Hess
R&C Hobby Shop Clarksville TN
-RCJuice-HobbyStar-RCP Customs
rkhess is offline   Reply With Quote
Old 09-19-2013, 05:51 AM   #126
Tech Elite
 
Join Date: Sep 2008
Location: Ashland city tn
Posts: 2,557
Trader Rating: 49 (100%+)
Default

big thanks all who post build pictures!!! aka beta testers

I was just thinking it might take some custom dremel work but i think the gearing will work for vta and other spec classes ....and im a ninja with a dremel
__________________
Rick Hess
R&C Hobby Shop Clarksville TN
-RCJuice-HobbyStar-RCP Customs
rkhess is offline   Reply With Quote
Old 09-19-2013, 06:08 AM   #127
Tech Elite
 
Join Date: Sep 2008
Location: Ashland city tn
Posts: 2,557
Trader Rating: 49 (100%+)
Default

http://www.tamiya-model.co.uk/shop/o..._289_2413.html


never orderd from the uk site and dont know if thier located in uk ..but another site that has them in stock ...UK drivers?
__________________
Rick Hess
R&C Hobby Shop Clarksville TN
-RCJuice-HobbyStar-RCP Customs
rkhess is offline   Reply With Quote
Old 09-19-2013, 06:41 AM   #128
Tech Elite
 
CraigMBA's Avatar
 
Join Date: Mar 2003
Location: Valley of the Dirt, CA
Posts: 2,832
Trader Rating: 22 (100%+)
Default

Quote:
Originally Posted by Sith Lord View Post
Agree. I'd be keen to give this chassis a go, just to be different, but it would have to get to about that below I reckon...... The high internal ratio could stuff it up. Most modern touring cars are around 2.0 these days. Do they have aftermarket gears that you could use?
On my tb-03, I used a PRS spur and a CRC pinion (64 pitch). Only two of the screws line up, and if you over tighten them it warps the spur, so use Loctite and do it sparingly. Frankly, it's my least favorite part of that chassis.

Looking at the pictures and the manual, I think you could do the same thing. It seems like the toothed part of the gear rides outside (inboard) of the loop. I'm not comcerned about the gear.
__________________
* Cee Lo Dizzle, the Secizzle * Red Bull * Team Homies * Pintura de Negro Mate * USVTA #152
CraigMBA is offline   Reply With Quote
Old 09-19-2013, 06:47 AM   #129
Tech Apprentice
 
speedy_w_beans's Avatar
 
Join Date: Dec 2012
Location: North Carolina, USA
Posts: 67
Trader Rating: 1 (100%+)
Default

FWIW, I measured the spacing inside the T5/T7 motor mount parts and it's 18.3 mm. The outside diameter of a pinion gear is (N+2)*M, where N is the number of teeth and M is the module/pitch of the gear. Therefore, (28+2)*0.6=18 mm, and 28T pinion is the biggest that will fit inside T5/T7. Building the kit exactly as shown in the manual means the lowest gearing is 5.89:1 at the moment. There would have to be a completely new motor mount design opening up space for a larger pinion to get lower ratios...

The easier path at the moment would be to transplant the TB04 gear diff's, front one way, carbon damper stays, and short dampers onto a TB03 and then work with the gearing in a more open gearbox. The TB04 is probably going to be a 10.5T and lower motor car...
speedy_w_beans is offline   Reply With Quote
Old 09-19-2013, 06:55 AM   #130
Tech Apprentice
 
speedy_w_beans's Avatar
 
Join Date: Dec 2012
Location: North Carolina, USA
Posts: 67
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by CraigMBA View Post
Looking at the pictures and the manual, I think you could do the same thing. It seems like the toothed part of the gear rides outside (inboard) of the loop. I'm not comcerned about the gear.
T5/T7 directly touch the face of the motor and the back of the motor mount plate, so the pinion gear is surrounded. Also keep in mind the side of the chassis tub allows limited movement of the motor back and forth...
speedy_w_beans is offline   Reply With Quote
Old 09-19-2013, 08:03 AM   #131
Tech Elite
 
CraigMBA's Avatar
 
Join Date: Mar 2003
Location: Valley of the Dirt, CA
Posts: 2,832
Trader Rating: 22 (100%+)
Default

Quote:
Originally Posted by speedy_w_beans View Post
T5/T7 directly touch the face of the motor and the back of the motor mount plate, so the pinion gear is surrounded. Also keep in mind the side of the chassis tub allows limited movement of the motor back and forth...
Looking again, you are right. Max pinion size is a 45. Assuming this is intended to replace the ta05/tb03 cars in US TCS races, I have no idea what to do with this car outside of silver can racing. Even gt1 runs more gear than 5:1.
__________________
* Cee Lo Dizzle, the Secizzle * Red Bull * Team Homies * Pintura de Negro Mate * USVTA #152
CraigMBA is offline   Reply With Quote
Old 09-19-2013, 08:57 AM   #132
Tech Fanatic
 
Airflow's Avatar
 
Join Date: May 2005
Location: Manila
Posts: 822
Trader Rating: 13 (100%+)
Default

Upon closer look, the outdrives are supported by metal bushings and not ball bearings. I just finished prepping the carbonfiber shock towers.
Airflow is offline   Reply With Quote
Old 09-19-2013, 09:11 AM   #133
Tech Champion
 
Core Creations's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2001
Location: Back in the booth
Posts: 5,629
Trader Rating: 91 (100%+)
Send a message via AIM to Core Creations
Default

So if a 45 is the biggest pinion whats the smallest spur that you can get to work with that pinion??? Creative dremeling help?
__________________
Core Creations paint thread

Mini Mafia Kansas Chapter - where the monster minis grow!
Core Creations is offline   Reply With Quote
Old 09-19-2013, 11:07 AM   #134
Tech Lord
 
Hebiki's Avatar
 
Join Date: Aug 2003
Location: Chino, CA
Posts: 12,919
Trader Rating: 26 (100%+)
Default

i find it hard to believe that Tamiya wouldn't allow this car to have an FDR lower than 5. But then again..... Tamiya still gives you crappy screws with all their kits.
__________________
Hebiki Design Works
Custom R/C Vinyl Graphics & Apparel: Your gear, your way!
Web Design - Web Development - Logo Design - Graphic Design
www.facebook.com/HebikiDesignWorks
Hebiki is offline   Reply With Quote
Old 09-19-2013, 12:20 PM   #135
Tech Apprentice
 
speedy_w_beans's Avatar
 
Join Date: Dec 2012
Location: North Carolina, USA
Posts: 67
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Airflow View Post
Upon closer look, the outdrives are supported by metal bushings and not ball bearings. I just finished prepping the carbonfiber shock towers.
I saw that too. I hate bushings, so I'm ordering some 850 bearings to replace them.

Mentally I'm in a weird spot with this kit now. I want to build it just to enjoy the build and have something fresh, but I don't want to build it because the gearing is so limited.

I guess the first step is I'll dig through my parts box for some other motor mounts and think about modifying the chassis to accept one of them.

If no clear plan comes to mind, then I might start thinking about transplanting all the "PRO" parts to a TB03. The gear diffs, C-hubs, CVDs, short dampers, carbon damper stays, steering bridge, turnbuckles, servo saver, and ball connectors might make good upgrades to a TB03.

Ultimately it might just get built box-spec and turned into a street basher with a mod motor in it...
speedy_w_beans is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 05:03 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net

SEO by vBSEO 3.5.0