Tamiya TB04 Pro

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Old 10-16-2013, 10:49 AM
  #211  
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While I'm waiting for my kit to arrive, I mocked up a pinion and the brass sleeves. I can get a 51 in there no problem. That gets FDR to around 3.72 (51/76), no bueno for GT3, but real close for GT2. And looking at the optional motor mount, I think there's even more room:



If you can get a 52 in there, you're at 3.65 and that's close enough. Plus, you can probably fit a smaller spur in there without adjustment with the bigger pinion.
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Old 10-16-2013, 11:02 AM
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Originally Posted by CraigMBA View Post
While I'm waiting for my kit to arrive, I mocked up a pinion and the brass sleeves. I can get a 51 in there no problem. That gets FDR to around 3.72 (51/76), no bueno for GT3, but real close for GT2. And looking at the optional motor mount, I think there's even more room:



If you can get a 52 in there, you're at 3.65 and that's close enough. Plus, you can probably fit a smaller spur in there without adjustment with the bigger pinion.
Good to know Craig! Thanks!
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Old 10-18-2013, 09:07 AM
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Motor mount with a 48tooth pinion and no room for movement

Attached Thumbnails Tamiya TB04 Pro-tb04-motor-mount_48.jpg  
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Old 10-18-2013, 10:15 AM
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Where does it hit? On the corners?
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Old 10-18-2013, 10:54 AM
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Originally Posted by CraigMBA View Post
Where does it hit? On the corners?
It touches everywhere. I basically looked for the largest pinion that would drop in.
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Old 10-18-2013, 11:21 AM
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A person I race with locally in VTA came up with a solution to get the gearing/FDR he wanted for his TB04. He has access to a machine shop, so he fabricated a part(s). Tonight is his debut of the TB04 in VTA. If I can get a good picture of his solution I will post it.

At our local track we typically run anywhere between 3.6-3.8 FDR. From talking to him, he could go much lower. He would never sell/manufacture anything, but at least it might inspire others to duplicate his solution.
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Old 10-18-2013, 03:19 PM
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Originally Posted by rtypec View Post
Motor mount with a 48tooth pinion and no room for movement

Rod, get the dremel out. I know you like keeping things pretty. But screw it. I see lots of metal that can be removed.
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Old 10-18-2013, 04:04 PM
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So long to GT2 racing with this car....
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Old 10-18-2013, 06:55 PM
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Originally Posted by OSherman View Post
So long to GT2 racing with this car....
If the rules don't allow for grinding out the 1mm that needs clearance, I'll grind it out anyway and use this car for VTA.

Winner!
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Old 10-18-2013, 07:30 PM
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front row!
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Old 10-18-2013, 09:37 PM
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I've had the kit for about two hours, and I'm no longer sweating gear.



That's a 54 (as big as you can go before you hit the screws), it is a PRS pinion (wider than a CRC), it turns and doesn't hit. It looks sano, and took about two minutes using a dremel sanding drum. With a 72 tooth spur, FDR of 3.33. The instructions give a measurement for pinion location, it's 14mm, that's where mine is.

I put a pm into Fred and asked if this is okay per TCS rules. For the life of me I don't know why it wouldn't be. They allow tb-03 users to mill the chassis so a lipo fits flat, and this isn't part of the chassis.

Last edited by CraigMBA; 10-18-2013 at 09:54 PM.
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Old 10-18-2013, 10:12 PM
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Sometimes I think Tamiya is still in this little world of theirs where only silver can motors and shotgun style batteries exist.
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Old 10-19-2013, 01:13 AM
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Originally Posted by CraigMBA View Post
I've had the kit for about two hours, and I'm no longer sweating gear.



That's a 54 (as big as you can go before you hit the screws), it is a PRS pinion (wider than a CRC), it turns and doesn't hit. It looks sano, and took about two minutes using a dremel sanding drum. With a 72 tooth spur, FDR of 3.33. The instructions give a measurement for pinion location, it's 14mm, that's where mine is.

I put a pm into Fred and asked if this is okay per TCS rules. For the life of me I don't know why it wouldn't be. They allow tb-03 users to mill the chassis so a lipo fits flat, and this isn't part of the chassis.
That is not modifying the chassis in any way. That's just a spacer to attach the motor. I don't see any reason why it wouldn't be legal. Show it to Fred.
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Old 10-19-2013, 04:30 AM
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What's the internal ratio of this car?
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Old 10-19-2013, 05:42 AM
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Anyone taking this car to TA today?
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