R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 02-16-2010, 07:47 AM   #961
Tech Champion
 
F N CUDA's Avatar
 
Join Date: May 2007
Location: Mission Viejo, So Cal
Posts: 5,424
Trader Rating: 30 (100%+)
Default

Quote:
Originally Posted by k_bojar View Post
anyone know where I can get the rear gearbox for the 15th anniversary car?? also known as the F104GT gear box? part number 51243
I think you meant F103GT gearbox?

The F104 is different but will work, bolts right up and the hop up is aluminum on both sides.
I run it on my F103 til TCS Regionals.

Couple problems with it tho,

1. Not Tamiya legal as a hop up for the F103 now (was ok last year tho.)

2. It repositions the axle higher in the gearbox/side frame lowering the rear of the chassis more so it doesn't allow you to run smaller diameter rear tires.
I think 52 to 53mm is about the limit (off the top of my head) then the chassis drags.
There is a mod I did to allow more adjustment if you really want to run it.

PM me for details if you're interested.

Not sure who else to check to get the F103 gearbox tho.

I can usually find stuff in the random ebay stores like,

RCSausagedog.com
Jasonrc.com
...
I just look around and when I find any F103 parts listed I check their store.
You might be surprised who has hard to find parts.
__________________
Craig Hammon
F N CUDA is offline   Reply With Quote
Old 02-16-2010, 08:31 AM   #962
Tech Champion
 
k_bojar's Avatar
 
Join Date: Oct 2001
Location: Philadelphia, PA
Posts: 6,926
Trader Rating: 30 (100%+)
Send a message via ICQ to k_bojar Send a message via AIM to k_bojar
Default

Quote:
Originally Posted by F N CUDA View Post
I think you meant F103GT gearbox?

The F104 is different but will work, bolts right up and the hop up is aluminum on both sides.
I run it on my F103 til TCS Regionals.

Couple problems with it tho,

1. Not Tamiya legal as a hop up for the F103 now (was ok last year tho.)

2. It repositions the axle higher in the gearbox/side frame lowering the rear of the chassis more so it doesn't allow you to run smaller diameter rear tires.
I think 52 to 53mm is about the limit (off the top of my head) then the chassis drags.
There is a mod I did to allow more adjustment if you really want to run it.

PM me for details if you're interested.

Not sure who else to check to get the F103 gearbox tho.

I can usually find stuff in the random ebay stores like,

RCSausagedog.com
Jasonrc.com
...
I just look around and when I find any F103 parts listed I check their store.
You might be surprised who has hard to find parts.
yes, i meant the F103GT gearbox - silly typo

I've thought about using the F104 aluminum parts, but I'd still need the ride height adaptors (the reason why i wanted the F103GT gearbox )

I'll probably end up running rubber tires on the car this summer - and won't hit any TCS races until next year at the earliest...i do have a gearbox pack coming in from overseas, but haven't heard anything back yet - so i was looking for a backup just in case

I guess in the worse case, I can run the original plastic gearbox i have currently - i just won't be able to use the aluminum motor mount until I find ride height adaptors...it will work, but not the idea situation i was looking for
__________________
Bodies By Bean | Team Belly
k_bojar is offline   Reply With Quote
Old 02-16-2010, 08:47 AM   #963
Tech Champion
 
F N CUDA's Avatar
 
Join Date: May 2007
Location: Mission Viejo, So Cal
Posts: 5,424
Trader Rating: 30 (100%+)
Default

Quote:
Originally Posted by k_bojar View Post
yes, i meant the F103GT gearbox - silly typo

I've thought about using the F104 aluminum parts, but I'd still need the ride height adaptors (the reason why i wanted the F103GT gearbox )

I'll probably end up running rubber tires on the car this summer - and won't hit any TCS races until next year at the earliest...i do have a gearbox pack coming in from overseas, but haven't heard anything back yet - so i was looking for a backup just in case

I guess in the worse case, I can run the original plastic gearbox i have currently - i just won't be able to use the aluminum motor mount until I find ride height adaptors...it will work, but not the idea situation i was looking for
So you have the fixed axle gearbox, I see the problem.
__________________
Craig Hammon
F N CUDA is offline   Reply With Quote
Old 02-16-2010, 10:13 AM   #964
Tech Elite
 
j.d.roost's Avatar
 
Join Date: Jul 2008
Posts: 3,071
Trader Rating: 28 (100%+)
Default

..
j.d.roost is offline   Reply With Quote
Old 02-16-2010, 02:11 PM   #965
Tech Champion
 
k_bojar's Avatar
 
Join Date: Oct 2001
Location: Philadelphia, PA
Posts: 6,926
Trader Rating: 30 (100%+)
Send a message via ICQ to k_bojar Send a message via AIM to k_bojar
Default

Quote:
Originally Posted by F N CUDA View Post
So you have the fixed axle gearbox, I see the problem.
yuppers - which is fine, it just means I cannot use the 'fancy' aluminum motor mount...

i'll just cross my fingers that the one i ordered from ebay makes it here before I'm running the car
__________________
Bodies By Bean | Team Belly
k_bojar is offline   Reply With Quote
Old 02-16-2010, 02:29 PM   #966
Tech Champion
 
robk's Avatar
 
Join Date: Aug 2001
Location: Macho Business Donkey Wrestler
Posts: 7,472
Trader Rating: 22 (100%+)
Default

Quote:
Originally Posted by k_bojar View Post
anyone know where I can get the rear gearbox for the 15th anniversary car?? also known as the F103GT gear box? part number 51243

I went thru all my 'usual' people overseas (stella hobbies, rcmart, rc-model, rc market, and percisionrc) and plain outta luck...even Tamiyausa and tower don't have the part in stock...even ebay don't have the part listed

anyone else have an idea?
I am almost positive I saw this in stock last week at Harbor Hobby
http://www.harbor-hobby.net/ call and ask for Eric

Otherwise I was able to get them from RC Champ in Japan
__________________
A mutually re-enforcing cascade of failure

"Failior [sic] crowns enterprise." Robert Goddard

I-Lap Scoring Systems http://www.rclapcounter.com/
robk is offline   Reply With Quote
Old 02-16-2010, 04:20 PM   #967
Tech Regular
 
zpmhinojosa's Avatar
 
Join Date: Aug 2009
Location: Reno,NV
Posts: 262
Send a message via AIM to zpmhinojosa
Default An even newer video!!!

Earlier on 2-14-10...
+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.

Enjoy!
zpmhinojosa is offline   Reply With Quote
Old 02-17-2010, 02:40 AM   #968
Tech Adept
 
chinaman's Avatar
 
Join Date: Feb 2010
Location: UK
Posts: 141
Default F103 spur

Hello

Can I check what spur gear are you guys using in your F103? My diff keeps slipping. Am currently using the standard AV 63T. I am using a HPI 20T sealed can. Motor restriction in my class. I have the option to get some Kawada M0.4 spurs which uses I think 12 ball bearings instead of the 6 in the standard Tamiya.

I think I have spent a fortune in modifying the F103 and have come to a conclusion (that I already knew a long time ago but refuse to accept) that it is the design as compared to other pan chassis out there like the Gen X and RC10R5.

But I still like the fact that I can take my GT shell off and just put some wings on and it is an F1 car

Cheers
__________________
... wyrd bi ful rd ...
chinaman is offline   Reply With Quote
Old 02-17-2010, 02:50 AM   #969
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,168
Default

If your diff is slipping then you have something wrong in your thrust assembly. Often times this is due to something wrong with the spring washers that put the pressure on the thrust washers. Over time these spring washers go flat and no longer work properly. Also putting them on the wrong direction can cause problems with diff slippage.
InspGadgt is offline   Reply With Quote
Old 02-17-2010, 10:16 AM   #970
Tech Regular
 
Join Date: Jul 2004
Location: North Bay
Posts: 485
Trader Rating: 10 (100%+)
Default

Hello all,

So I know the included spur in the 15 anniv. is 0.4 pitch 93tooth. My question is what is equivalent in 64pitch.

Also, what is a general spur tooth count that the majority of everyone is using. Cheerz
Obsidian is offline   Reply With Quote
Old 02-17-2010, 11:34 AM   #971
Tech Elite
 
j.d.roost's Avatar
 
Join Date: Jul 2008
Posts: 3,071
Trader Rating: 28 (100%+)
Default

I think mode 4 is close to 48 pitch. So if needed you could crunch the numbers using 48 pitch as a guide.
http://www.robinsonracing.com/tips.html


Remember ratio is ratio 48 pitch 64 pitch it don't matter.
I am running 3:31 ratio with a silvercan (cut down foams).

I find using a 94 to 98 spur gives you alot of options with pinion size (64 pitch).

Oh and don't forget about rollout with foam tires! When you cut them it will effect things a bit.
j.d.roost is offline   Reply With Quote
Old 02-17-2010, 12:19 PM   #972
Tech Elite
 
JayL's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2006
Location: Ca
Posts: 2,795
Default

Quote:
Originally Posted by Obsidian View Post
Hello all,

So I know the included spur in the 15 anniv. is 0.4 pitch 93tooth. My question is what is equivalent in 64pitch.

Also, what is a general spur tooth count that the majority of everyone is using. Cheerz
most at my track run 64p 100t kimbrough spurs, they let you run 8 balls and normal pinions
just choose your pinion based on around 47-52mm rollout for silver can
JayL is offline   Reply With Quote
Old 02-17-2010, 01:11 PM   #973
Tech Elite
 
j.d.roost's Avatar
 
Join Date: Jul 2008
Posts: 3,071
Trader Rating: 28 (100%+)
Default

Quote:
Originally Posted by JayL View Post
most at my track run 64p 100t kimbrough spurs, they let you run 8 balls and normal pinions
just choose your pinion based on around 47-52mm rollout for silver can
Just watch that high number. We started toasting them at Horsham around 51. (high bite carpet)
j.d.roost is offline   Reply With Quote
Old 02-17-2010, 02:59 PM   #974
Tech Adept
 
chinaman's Avatar
 
Join Date: Feb 2010
Location: UK
Posts: 141
Default

Quote:
Originally Posted by JayL View Post
... just choose your pinion based on around 47-52mm rollout for silver can
that was what i needed to know ... if i am using a 20T HPI sealed can, does that mean that i need a lower roll-out. I am currently running it at ... gosh 59!!!. maybe that is why i hear go eeeeek (diff slipping) all the time
__________________
... wyrd bi ful rd ...
chinaman is offline   Reply With Quote
Old 02-17-2010, 03:10 PM   #975
Tech Champion
 
F N CUDA's Avatar
 
Join Date: May 2007
Location: Mission Viejo, So Cal
Posts: 5,424
Trader Rating: 30 (100%+)
Default

Quote:
Originally Posted by chinaman View Post
that was what i needed to know ... if i am using a 20T HPI sealed can, does that mean that i need a lower roll-out. I am currently running it at ... gosh 59!!!. maybe that is why i hear go eeeeek (diff slipping) all the time
What method do you use to set your diff?

Will your diff stop slipping if you tighten it, are you trying to run it loose?

Put it on the track, punch it, if it slips tighten it, if it won't tighten you have something wrong.

Put fresh spur gear, diff balls and rings $10 and fresh thrust bearing $5 more.

Repeat adjustment process

Newly freshened diff, PRICELESS.

My 27turn Cobalt brushed motor was stupid fast in this car, 20turn could be insane.
__________________
Craig Hammon
F N CUDA is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Tamiya F103 mild seven Australia For Sale/Trade 4 08-19-2008 11:19 PM
Tamiya F103 GT izzyracer R/C Items: For Sale/Trade 2 03-01-2007 03:51 PM
Tamiya F103 NIB Jspecrcr R/C Items: For Sale/Trade 7 11-07-2006 01:30 PM
WTB: Tamiya buggy & Tamiya f103 stuff rays_tt Australia Wanted to Buy 2 04-20-2006 06:10 AM
Tamiya F103 or F103 Parts MM-F1 R/C Items: Wanted to Buy 4 04-24-2004 03:14 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 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 01:25 PM.


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