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Old 12-09-2008, 12:24 AM   #1
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Default TB-03 or TA-05 for club racer

Hi,
I have been reading various threads in here about the TB-03 and TA-05, both seem to be quite good cars. Which would you suggest is a better club level racer on medium-tight asphalt track.

Currently I see it like this:
TB-03 - Rear engine mount gives better rear traction. For some reason I like shaft drive but not really sure if it is much less hassle then belt.

TA-05 - Seems more like the TRF series of cars.

What are the handling positives and negatives of both of these? This would help me decide which suits my style and tracks best.
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Old 12-09-2008, 01:05 AM   #2
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Ok, I am sure you've worked this bit out..

The TA05 is nicely balanced around the center of the chassis.
The TB03, because of the rear motor position, will be heavy on the rear.

Now the bits that I have thought of...

TA05 centrally balanced chassis, this is the business right here.. +1 TA05
TB03 rear weight bias will have more rear traction than TA05... +1 TB03
TB03 rear will probably have a tendency to swing out left/right off power on corner entry because of the weight... -1 TB03
TB03 has shaft drive, which can result in torque steer.. -1 TB03
TA05 has 2 even length belts and doesnt suffer from the torque steer effect of shaft cars.. +1 TA05
TA05, given weight bias, will transition left/right through chicanes and s-bends more easily.. +1 TA05
TB03 has shaft drive, belts slipping or stripping wont be an issue with extra power.. +1 TB03
TB03 possibly has limited travel in motor mount so may not be able to take the same range of spurs/pinions as TA05.. -1 TB03

A quick add up of the + and - given for the above..

TA05 = 3
TB03 = -1

Someone who likes shaft drive cars probably would give the scores around differently :P

-Mark
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Old 12-09-2008, 01:09 AM   #3
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Thanks for that detailed response.
I guess my main concern with the TA-05 was the belt drive, but if I stick to the track I shouldn't have any problems with it I guess.
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Old 12-09-2008, 01:34 AM   #4
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I dunno my TA-05 gets the occasional driveway run to scare some of the local cats.

Never had an issue.
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Old 12-09-2008, 02:10 AM   #5
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Whichever you go for, reliability shouldnt be an issue. Had my ta05 for 2 seasons and all i've broken are the plastic toe blocks.

If you go for the TB03 just make sure the crown and pinion gears are correctly meshing.
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Old 12-09-2008, 02:46 AM   #6
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TB03 has a sealed drivetrain which my be an advantage depending on the track preparation.

TB03 and TA05 IFS both have the latest version of Tamiya's suspension, standard TA05 (except R) has the old TA04 suspension (probably makes very little difference at club level but the newer "reversible" suspension is more adjustable).

Weight distribution - TA05 is actually quite rearwards with weight due to the cells being a long way back. Also TA05 cells are quite a long way from the centreline of the car due to the width of the twin belt drive system. I haven't seen a TB03 in the flesh so can't comment on it's weight distribution.

Shaft-drive touring cars do suffer from torque steer, depending on the track conditions you may or may not notice it.

I have owned a TA05-R in the past and I can say that it is definitely one of the most forgiving cars for a club racer to drive and very good value. The TA05 has very good rear traction and that makes it a real weapon in low-to-medium grip situations, when the high-end chassis are spinning out!
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Old 12-09-2008, 04:52 AM   #7
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careful if you are going to run 17.5.... it is nearly impossible to get down to the proper gearing with the TB-03 (it has a 2.4 internal drive ratio)
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Old 12-09-2008, 08:58 AM   #8
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Quote:
Originally Posted by gbasile77 View Post
Hi,
I have been reading various threads in here about the TB-03 and TA-05, both seem to be quite good cars. Which would you suggest is a better club level racer on medium-tight asphalt track.

Currently I see it like this:
TB-03 - Rear engine mount gives better rear traction. For some reason I like shaft drive but not really sure if it is much less hassle then belt.

TA-05 - Seems more like the TRF series of cars.

What are the handling positives and negatives of both of these? This would help me decide which suits my style and tracks best.

Great to see this thread started!
Thank you all for the info.
I know now what car I will run of the two chassis
I will stay with TA05's and will stay away from the tb03's
Dave
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Old 12-09-2008, 09:11 AM   #9
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For the moeny I feel your better off with an MSXX (dual one-ways) or MSXX-MRE (dual direct). If you plan on adding even a single hop-up to a TA05, it's definitely the better buy. Right now the MSXX can be had for $239 from a canadian online store called MuchHobby.com (+$30 postage). The MSXX-MRE can be had direct from TamiyaUSA for $310 shipped (free shipping till Christmas).

These cars a bit nicer because you don't have to worry about twisted chassis tubs that are brand new (nature of injection modling). The only down-side is that they are not lipo friendly and do require modding the bulkhead to fit them. Oh, and if your worried about wearing out the carbon-fiber plates, just buy some chassis protection film from RCTech memeber microdude...
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Old 12-09-2008, 11:22 AM   #10
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if you have a TCS race in your area, then a IFSR is a really good idea since GT2 (17.5) is IFS only now. also use it wkly for sedan races if desired.

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Old 12-09-2008, 11:50 AM   #11
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I got both, if you are going to run 19t or more, TA05, less, TB-03
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Old 12-09-2008, 12:19 PM   #12
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have you considered the Evo 5 MS?
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Old 12-09-2008, 11:07 PM   #13
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I went the TA05IFS-R has pretty much all the hop ups you'd need for racing already there and is fairly competitive (and I run 19t/10.5 against a bunch of X-ray's) Only extra hop up I felt was a must was bearings in the rocker arm's and steering instead of bronze bushings.
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Old 12-10-2008, 12:16 AM   #14
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the TA05 IFS R is definitely good value!
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Old 12-10-2008, 09:36 AM   #15
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Quote:
Originally Posted by sosidge View Post
TB03 has a sealed drivetrain which my be an advantage depending on the track preparation.

TB03 and TA05 IFS both have the latest version of Tamiya's suspension, standard TA05 (except R) has the old TA04 suspension (probably makes very little difference at club level but the newer "reversible" suspension is more adjustable).

Weight distribution - TA05 is actually quite rearwards with weight due to the cells being a long way back. Also TA05 cells are quite a long way from the centreline of the car due to the width of the twin belt drive system. I haven't seen a TB03 in the flesh so can't comment on it's weight distribution.

Shaft-drive touring cars do suffer from torque steer, depending on the track conditions you may or may not notice it.

I have owned a TA05-R in the past and I can say that it is definitely one of the most forgiving cars for a club racer to drive and very good value. The TA05 has very good rear traction and that makes it a real weapon in low-to-medium grip situations, when the high-end chassis are spinning out!
the newer TA05's come with reversible rear wishbones. at least I think mine did.
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