Tamiya TB-02
01-09-2006, 06:02 PM
#1606
Question on gearing a TB-02 for a silver can motor, carpet road course racing. I've been told the gear ratio should be between 5.4 and 5.0. How do I do this with Tamiya part numbers (for TCS racing).
My TB-02 manual only shows spur gear sizes down to 55T.
Can I use a 52T? If so, anyone know the Tamiya part #? What motor mount holes do I use for 52T spurs?
Thanks.
My TB-02 manual only shows spur gear sizes down to 55T.
Can I use a 52T? If so, anyone know the Tamiya part #? What motor mount holes do I use for 52T spurs?
Thanks.
01-09-2006, 07:45 PM
#1607
Originally Posted by Hawk6
Question on gearing a TB-02 for a silver can motor, carpet road course racing. I've been told the gear ratio should be between 5.4 and 5.0. How do I do this with Tamiya part numbers (for TCS racing).
My TB-02 manual only shows spur gear sizes down to 55T.
Can I use a 52T? If so, anyone know the Tamiya part #? What motor mount holes do I use for 52T spurs?
Thanks.
My TB-02 manual only shows spur gear sizes down to 55T.
Can I use a 52T? If so, anyone know the Tamiya part #? What motor mount holes do I use for 52T spurs?
Thanks.
01-09-2006, 07:58 PM
#1608
Originally Posted by Hawk6
Question on gearing a TB-02 for a silver can motor, carpet road course racing. I've been told the gear ratio should be between 5.4 and 5.0. How do I do this with Tamiya part numbers (for TCS racing).
My TB-02 manual only shows spur gear sizes down to 55T.
Can I use a 52T? If so, anyone know the Tamiya part #? What motor mount holes do I use for 52T spurs?
Thanks.
My TB-02 manual only shows spur gear sizes down to 55T.
Can I use a 52T? If so, anyone know the Tamiya part #? What motor mount holes do I use for 52T spurs?
Thanks.
Why do you have to use Tamiya Part#'s?
TCS here in the USA says any manufacturers pinion.
01-10-2006, 12:53 AM
#1610
Originally Posted by Hawk6
Question on gearing a TB-02 for a silver can motor, carpet road course racing. I've been told the gear ratio should be between 5.4 and 5.0. How do I do this with Tamiya part numbers (for TCS racing).
My TB-02 manual only shows spur gear sizes down to 55T.
Can I use a 52T? If so, anyone know the Tamiya part #? What motor mount holes do I use for 52T spurs?
Thanks.
My TB-02 manual only shows spur gear sizes down to 55T.
Can I use a 52T? If so, anyone know the Tamiya part #? What motor mount holes do I use for 52T spurs?
Thanks.
if you use 52T spur, you will end up with the following :
25t pinion @ hole A = 5.41
26t pinion @ hole B = 5.2
27t pinion @ hole C = 5
28t pinion @ hole D = 4.82
kawada makes some pinions in Tamiya's AV pitch, among which there's 27T+ 28T as well.
01-10-2006, 01:52 AM
#1611
Tech Rookie
tamiyarcracer.
Thanks for your reply. Just to clarify, are you saying the head of the screw should be on the side of the thrust bearing where the brass ID is NOT flush with the silver outer part. Hope that makes sense. As you say it looks tapered as opposed to the other side which looks flush with the silver outer.
Cheers
Dave
Thanks for your reply. Just to clarify, are you saying the head of the screw should be on the side of the thrust bearing where the brass ID is NOT flush with the silver outer part. Hope that makes sense. As you say it looks tapered as opposed to the other side which looks flush with the silver outer.
Cheers
Dave
01-10-2006, 08:28 AM
#1612
Tech Rookie
Originally Posted by DaveMorris
Hi.
Im currently racing my TBO2R in a UK carpet championship running 27 turn stock motors. It is very competitive against yokomo BD's and TC4's, Im currently placed 7th in a 70 car championship. My problem is that I am regularly shearing the 2mm diff screws. Usually one a meeting. Out of frustration I gave my diffs to my mate who runs an evo 3 and he reckons they are built and tensioned correctly. I have swapped to standard evo3 diff cups from the TBO2R ones but still the screws break. The only thing I can see is that an evo 3 runs no shims according to the manual behind the diff bearings. The TBO2R runs 2 X 0.1mm shims. I have now removed these and have yet to try the car at the next meeting in 2 weeks. Have any of you guys had this problem.
cheers
Dave
Im currently racing my TBO2R in a UK carpet championship running 27 turn stock motors. It is very competitive against yokomo BD's and TC4's, Im currently placed 7th in a 70 car championship. My problem is that I am regularly shearing the 2mm diff screws. Usually one a meeting. Out of frustration I gave my diffs to my mate who runs an evo 3 and he reckons they are built and tensioned correctly. I have swapped to standard evo3 diff cups from the TBO2R ones but still the screws break. The only thing I can see is that an evo 3 runs no shims according to the manual behind the diff bearings. The TBO2R runs 2 X 0.1mm shims. I have now removed these and have yet to try the car at the next meeting in 2 weeks. Have any of you guys had this problem.
cheers
Dave
01-10-2006, 10:44 AM
#1613
Tech Rookie
Thanks for that info. I will order some of those screws and also check which way round the thrust bearing is and hopefully it will be cured. Its the only thing that I can fault the car for. Its awsome on prima felt carpet.
01-10-2006, 12:09 PM
#1614
I agree that the TB-02 is awesome on carpet. I'm no expert, and maybe it's just set-up details that I'm not smart enough to figure out yet, but my Tamiya TB-02 can beat my Associated TC3 and Tamiya Evolution 3 on the same track with the same motors, batteries, gearing, etc. It just seems so smooth.
Like I said, it may just be set-up details that I haven't figured out yet, but my TB-02 is my favorite car.
Like I said, it may just be set-up details that I haven't figured out yet, but my TB-02 is my favorite car.
01-10-2006, 03:06 PM
#1618
Originally Posted by tamiyarcracer
Yes this is a problem
I have usually found that the thrust bearing is in backwards.
the screw head should be on the side of the thrust bearing that has the taper on the ID
Also make sure the thrust bearing is well graesed with Aw or something similar.
I have usually found that the thrust bearing is in backwards.
the screw head should be on the side of the thrust bearing that has the taper on the ID
Also make sure the thrust bearing is well graesed with Aw or something similar.
I found that the car worked flawlessly for me for 7 months then it just started breaking these, I tihnk it came down to me mostly rnning the screw too tight, the diff was almost acting like a spool for me
01-10-2006, 05:41 PM
#1619
Originally Posted by DaveMorris
tamiyarcracer.
Thanks for your reply. Just to clarify, are you saying the head of the screw should be on the side of the thrust bearing where the brass ID is NOT flush with the silver outer part. Hope that makes sense. As you say it looks tapered as opposed to the other side which looks flush with the silver outer.
Cheers
Dave
Thanks for your reply. Just to clarify, are you saying the head of the screw should be on the side of the thrust bearing where the brass ID is NOT flush with the silver outer part. Hope that makes sense. As you say it looks tapered as opposed to the other side which looks flush with the silver outer.
Cheers
Dave
01-13-2006, 05:37 PM
#1620
Drivetrain
Hi all. A quick question regarding the drivetrain of the TB02. I have recently built one for my son and whilst it appears to run OK there are a few things I have noticed when I compare them to our TA05 and TA04.
Firstly, the drivetrain appears to be less free-wheeling than the others. At first I put this down to the fact that it was a shaft drive and the other two are belt drive however I have also noticed that the motor runs a bit hotter than the others as well. My question is should the dirvetrain be as free as a belt drive such as the TA04/TA05? Should the wheels spin as freely when the car is off the ground or is it normal for them to be tighter?
Secondly, on acceleration the TB02 makes a high pitch sound that tapers off as the car gathers speed. It accelerates at much the same speed as the others however I thought that it may be suffering from a slipping diff (which I am reluctant to tighten given the possible problem above). Should a TB02 and a TA05 accelerate at much the same speed given the same motors and stock drivetrain? Tyres are Sorex 28r on asphalt - I don't think it is wheel spin.
Thanks for any advice or help you may be able to give.
Firstly, the drivetrain appears to be less free-wheeling than the others. At first I put this down to the fact that it was a shaft drive and the other two are belt drive however I have also noticed that the motor runs a bit hotter than the others as well. My question is should the dirvetrain be as free as a belt drive such as the TA04/TA05? Should the wheels spin as freely when the car is off the ground or is it normal for them to be tighter?
Secondly, on acceleration the TB02 makes a high pitch sound that tapers off as the car gathers speed. It accelerates at much the same speed as the others however I thought that it may be suffering from a slipping diff (which I am reluctant to tighten given the possible problem above). Should a TB02 and a TA05 accelerate at much the same speed given the same motors and stock drivetrain? Tyres are Sorex 28r on asphalt - I don't think it is wheel spin.
Thanks for any advice or help you may be able to give.