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Old 06-28-2009, 06:56 PM   #1
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Default TA05 vs TB03 - Time to decide

So I'm looking at picking up my first on-road racer for running in unprepared parking lots. Ultimately, I'll probably go brushless as I tend to get bored with brushed electrics.

It's New Mexico, so there tends to be a lot of sand and small pebbles where my friends and I race around. At the end of a parking lot run, my stadium truck will have collected several pebbles and rocks. The issues are these:

Will pebbles and junk jam/tear up the belt drive in a TA05?

Will I hate the torque steer in a TB03 if I go to brushless and lipos?

Thoughts or advice?
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Old 06-28-2009, 07:22 PM   #2
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Pebbles will destroy the pulleys. I get stones in mine from time to time and race on a track, a carpark would create havoc!
Go for the shaft and feel comfortable knowing nothing will get in there.
There will be toque steer, apparently, but i'd say it won't be a big deal for carpark racing. The TB is of course on of Tamiya's newest cars, and I doubt they would release a car these days that would yank to the side every time you hit the gas! Just maybe leave that 2.5 turn brushless out of it for now
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Old 06-28-2009, 07:30 PM   #3
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go with tb-03 sealed trans and gears will help. if you using stock spec (10.5 13.5 17.5 21.5) brushless motors there will be no problem
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Old 06-28-2009, 08:49 PM   #4
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I recommend the TB03 as well. I haven't gotten mine yet, but I do own a evo 5 ms so I do run a Tamiya shaft car. Shaft drive is the way to go in my opinion for stock motors. Especially so if you have a aggressive driving style or like instant accelleration when you pull the trigger. TA05 is a little smoother going for most when getting on the throttle because the belts take some of the snap away. If you get a TB03 and it gets loose when you throttle it in the middle of a turn, just add a little - exp to the throttle or just smooth out your trigger finger. I personally like the feel and use that to my advantage when I need to make the car rotate a little harder on tight tracks. If your car is setup right and the chassis is sorted you will not have torque steer. The only time I have ever seen torque steer on my evo is when I put a 4 turn SP motor in it. It would shift about 6 in from a dead stop but was insanely fast

They are both very nice cars, but like others have said, in the environment you plan on racing it in TB03 all the way
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Old 06-28-2009, 09:48 PM   #5
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I had a TB-03, raced it a few times, then sold it and got a TA-05 IFS - which works great. I just couldn't stand the torque steer of the TB-03. BUT, if you race in a less than clean track, little pebbles and stones will eat up your gears and belt. So TB-03 is the way to go.
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Old 06-28-2009, 10:45 PM   #6
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id go with the TA05... hate having to change crown and pinion gears on the diff everytime i hit a wall (or get hit)...
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Old 06-29-2009, 12:14 AM   #7
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Quote:
Originally Posted by VooDooPH View Post
id go with the TA05... hate having to change crown and pinion gears on the diff everytime i hit a wall (or get hit)...
I have to disagree with you on durability of the drive train of the current Tamiya shaft drive cars. The evolution 3 had some problems like you described but that was related to diff case housing flex and a thinner more flexible crown gear that was used in that model evolution. Evo4, Evo5/tb03 all use a revised design that works very well and is dependable. I have used 17.5, 13.5 and even a 4 turn on my evo and I am still on the original drivetrain parts and I race it at 2 different tracks, 2 times a week. If anyone breaks internal gears on the newer cars, they shimmed/built there drivetrain wrong.
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Old 06-29-2009, 01:36 AM   #8
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Quote:
Originally Posted by Timmie View Post
I have to disagree with you on durability of the drive train of the current Tamiya shaft drive cars. The evolution 3 had some problems like you described but that was related to diff case housing flex and a thinner more flexible crown gear that was used in that model evolution. Evo4, Evo5/tb03 all use a revised design that works very well and is dependable. I have used 17.5, 13.5 and even a 4 turn on my evo and I am still on the original drivetrain parts and I race it at 2 different tracks, 2 times a week. If anyone breaks internal gears on the newer cars, they shimmed/built there drivetrain wrong.
good to hear that you're not having problems. unfortunately i already replaced some gears on mine... not too good for me considering i was only running a Tamiya GT Tuned (25T) motor running the box-stock FDR and Tamiya 1800 NiCd batteries...
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Old 06-29-2009, 01:55 AM   #9
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Ta05 is indeed prone to getting rubbish in the gear mesh. It happened to me running indoors on carpet to get a minute grain of dust in the gears and the car started wheezing like a plane in freefall and lost all speed. I finished the race having been caught up by the field but I thought I had destroyed something serious. When I found the speck of dust I was relieved, but could not believe how small it was. On the other hand I run 64 pitch gears. All's well and the gears didn't suffer at all, but it was an important lesson. I have covered the bottom hole with some sticky tape now and did not have any other problems. Perhaps in the future if it happens again I will think about using the gear cover that comes in the kit too.

Never had problems with the belts/pulleys but I think it's easy to get dirt, dust or any kind of crap squashed in the pulleys under the belt. Torn belts? I don't think it will happen easily.
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Old 06-29-2009, 05:56 AM   #10
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If it's for carpark bashing, definitely go for the TB03.

I have two TA05s, one is for the track only and the other is for bashing. The pinion and spur on the basher gets a pounding. The teeth look like... a 60 year old who hasnt brushed their teeth for 60 years - which means it's time for me to change them, and that's approximately after 2 runs.

For the track I'd go with the TA05.
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Old 06-29-2009, 10:41 AM   #11
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Hey guys, thanks for all the feedback. The TB-03 is on the way (NSX body). No promises, but I'm going to try to do a detailed writeup of the build.
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Old 06-29-2009, 04:19 PM   #12
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Quote:
Originally Posted by bluesxman View Post
Hey guys, thanks for all the feedback. The TB-03 is on the way (NSX body). No promises, but I'm going to try to do a detailed writeup of the build.
Glad you were able to make a decision. You couldn't have gone wrong either way as they are both great cars. I just got my tb03 today Can't wait to build it. Enjoy!
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Old 06-29-2009, 10:41 PM   #13
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Quote:
Originally Posted by JR007 View Post
Pebbles will destroy the pulleys. I get stones in mine from time to time and race on a track, a carpark would create havoc!
I had no probs with pulleys
I had lots of problems with pinion/spur gears being ruined by grit. It doesn't take much & both my TA05's were like vacuum cleaners sucking up grit & small stones.
I sold em both as I was in the end replacing gears after every days run.
Actually the cigarette butt it sucked up was the last straw.....
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Old 07-06-2009, 03:31 PM   #14
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ok new variation of this question, but without the rocks and pebbles. What should I recommend to a friend who has some rc experience, but not with electric touring cars and wants to race? TA-05 v.2 or TB-03?
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Old 07-06-2009, 03:40 PM   #15
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Just wanted to say that I built my TB-03 this weekend and I really liked the kit. First impressions:

1) Incredibly quiet and smooth transmission.
2) I'm really happy with the handling.
3) Stock motor/gearing seems very slow. Time for some twisty tracks.
4) Like everyone says, the steering is sloppy. Can't really drive a straight line.

Overall, I'm very happy with the car, although it wont stay stock. Hopefully I'll have stuff on the build in the next few days.
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