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Tamiya TB-Evolution III

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Old 02-19-2004, 09:02 AM
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Uaaahh, what ball bearings? I already ordered everything and had no ball bearings on my list.

I also have an 414M2 and he uses the TA04 ball diff. From what I saw in the manual it looked like that these bearings (53030)belonged to 53436. But when I am looking at the catalog picture of the set 53436 now, it looks like that are sintered bearings instead of ball bearings. But until I have a chance to order some, I could take them out of my 414M2s ball diff, right?

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Old 02-19-2004, 09:10 AM
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Or just go to your lhs and pick up a pair of 5x8mm bearings instead of dismantling a car.
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Old 02-19-2004, 09:12 AM
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Originally posted by hemi426
Uaaahh, what ball bearings? I already ordered everything and had no ball bearings on my list.

I also have an 414M2 and he uses the TA04 ball diff. From what I saw in the manual it looked like that these bearings (53030)belonged to 53436. But when I am looking at the catalog picture of the set 53436 now, it looks like that are sintered bearings instead of ball bearings. But until I have a chance to order some, I could take them out of my 414M2s ball diff, right?

Hemi
The TA04 diff comes with bushings instead of bearings. If you look at the rear diff. you will see that there are sealed ball bearings in there. Just take the bushings to a local hobby shop and I am sure they can find the right size bearing. Thats what I did.
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Old 02-19-2004, 09:52 AM
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Originally posted by hemi426
Hi, I still got no answer in the German Tamiya Euro Cup Forum, if the Mod from BigDog is considered TEC legal. Now I ordered all the parts needed to built a front ball diff (2x reinforced diff joints, TA04 ball diff and F201 diff plates) .

Is there also a problem with the gears stripping when using a ball diff instead of the original one-way? Anything else I have to consider when using a ball diff (setup etc.)?

Since my F201 has two ball diffs, I hope I get along with 2 ball diffs in the Evo3 as well.

The ball diff should also be significantly lighter than the one way, isn't it?

Thanx

Hemi
You don´t have to wait for an answer in the German Tamiya Forum. Any modifications at the car aren´t allowed so forget about Bigdogs mod if you wanna run the Tamiya Euro Cup.

But why you wanna run Eurocup as there are other interesting racing series? CS Cup or LRP/HPI-Challenge are open for all mods.
Also some local series.
After some mods my EVO3 is bulletproof now and I wouldn´t change it for any other car but I´m sure without the mods I wouldn´t run it anymore.

Yes the diff is lighter than the oneway. I´m not sure how much is the difference but I think it´s about 8 - 10 gramms. I was running a front diff at 2 races on carpet when the oneway didn´t work very good at that tracks but there is much less ripp out of corners. Also less steering so you have to change setup. Usually I try keeping with the oneway.
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Old 02-19-2004, 09:55 AM
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Originally posted by rtypec
Or just go to your lhs and pick up a pair of 5x8mm bearings instead of dismantling a car.
Thanks, I will try that.
Is it 8mm outside diameter, 5mm inside and thickness 3mm?

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Old 02-19-2004, 05:57 PM
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More commonly known as "850" bearings.

(8 OD, 5 ID but I think they're 2.5mm thick)


ps: nice truck
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Old 02-19-2004, 06:04 PM
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btw... the 2 ballbearings is Highly Recommended.

Running plastic bits (the EvoIII outdrives) in bushings is very bad;
the TA04 diff has the same bit in metal from memory.


But most long-time racers would have heaps of spare 850s tossed around your toolbox, you only need put your crappiest ones in there as they won't do much work anyway.
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Old 02-19-2004, 06:06 PM
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Default Square Gearbox

I ran my car at a race this past weekend with a square gearbox. After tons of bad brushes with the wall, the gear was still in tact at the end of the day. I must say...it's looking like a really good fix for the one way problem so far.

I just love my EVO3. As you see in my sig, I have a couple of TC3s, but for me the EVO is always the easiest car to drive. TC3s can be a bit tempermantle at times. I'm still trying to set my TC3 to run more like my EVO.
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Old 02-20-2004, 10:57 PM
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Default Re: Square Gearbox

Originally posted by stonedgti
I just love my EVO3. As you see in my sig, I have a couple of TC3s, but for me the EVO is always the easiest car to drive. TC3s can be a bit tempermantle at times. I'm still trying to set my TC3 to run more like my EVO.
LOL, I love my EVO too, but I can not get the car to go fast in a straight line. My EVO drives differently than my TC3's and feels more precise, but I break less parts on my TC3 at present time...(ie. gears...)

Tamiya Track tomorow...(weather permiting)

Just out of curosity, has anyone tried using the rear shock tower up front?(like what is done on the Yokomo's and Associated's) It should give more initial turn-in, and push slightly mid-corner. Is this desired, or should it be left alone?


p.s. I LOVE THE SHOCKS!!!
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Old 02-21-2004, 12:22 AM
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Default Alu one-way gear

I tested the Alu one-way gear last night and was not too pleased with the result. It simply ended up stripping the bevel gear completely. I was afraid that this might happen.

As I've got the Jürgen one-way, too, I'll be putting this into the car for Sunday.

Cheers, Mark.
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Old 02-21-2004, 01:06 AM
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Default Re: Alu one-way gear

Originally posted by markp27
I tested the Alu one-way gear last night and was not too pleased with the result. It simply ended up stripping the bevel gear completely. I was afraid that this might happen.

As I've got the Jürgen one-way, too, I'll be putting this into the car for Sunday.

Cheers, Mark.
Jürgen one-way does the same thing. I never strip the one way gear but the bevel gear is now taking the hit.
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Old 02-21-2004, 02:21 AM
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Really!

Well hopefully it lasts a little longer than the one-way gear though.
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Old 02-21-2004, 02:55 AM
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Originally posted by f1larry
The TA04 diff comes with bushings instead of bearings. If you look at the rear diff. you will see that there are sealed ball bearings in there. Just take the bushings to a local hobby shop and I am sure they can find the right size bearing. Thats what I did.
Oops...didn't know the question had already been answered.

Anyway I switched out that bushing when I build the ball diffs on my little brother's TA04S. The diff kit came with one bearing and the other one was bushing. I just happened to have extra 5x8mm spares and I decided to install both with bearings instead of bearing/bushing combination.
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Old 02-21-2004, 09:14 AM
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hi guys, just got a new TB III, i have heard some complains about the weak drive train. could anyone be more specific about this problem and is there anyway to fix it ? by the way, i also need some gearing suggestions, i will be running/racing mostly at socal raceway...any info will be appreciated.
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Old 02-21-2004, 10:19 AM
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Originally posted by Tag
hi guys, just got a new TB III, i have heard some complains about the weak drive train. could anyone be more specific about this problem and is there anyway to fix it ? by the way, i also need some gearing suggestions, i will be running/racing mostly at socal raceway...any info will be appreciated.
Tag, there are quite a few people with Evo3 at SoCal. I will be there today and next Tuesday. Look me up and I will share what I know. Jeff
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