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Old 05-17-2020, 08:51 AM
  #12211  
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Originally Posted by Woof6 View Post
ok, kewl. looks like if I stay in the 40's I should be alright from what I've read. Thank you. Will the xray spurs work? Considering the Axon DTS spurs
I'm not sure about the Xray spurs. I was using the white Robinson Racing spurs at one point.

https://www.towerhobbies.com/cgi-bin/wti0001p?&I=LXYGN3

I believe I switched to 64 pitch, but they were also Kimbrough, just black in color. Let me dig out my TC3 and see.
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Old 05-17-2020, 12:39 PM
  #12212  
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I use the Robinson Racing 64P spurs gears and use a 73T machined spur and 48T pinion in my TC3 giving a 3.80 FDR for the USGT class.

Last edited by SteveM; 05-17-2020 at 12:51 PM.
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Old 05-17-2020, 02:25 PM
  #12213  
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So the last time I ran the car I was using a 72T Kimbrough 64 pitch. They are the same spurs that we were using for pan cars like 1/12 and F1.

Last edited by angrymelon; 05-17-2020 at 02:38 PM.
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Old 05-17-2020, 02:29 PM
  #12214  
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Originally Posted by angrymelon View Post
So the last time I ran the car I was using a 72T Kimbrough 64 pitch. They are the same spurs that we were using for pan cars like 1/12 and F1.
The stock setup is a 48 pitch 72 tooth spur.
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Old 05-17-2020, 02:38 PM
  #12215  
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Originally Posted by Woof6 View Post
ok, kewl. looks like if I stay in the 40's I should be alright from what I've read. Thank you. Will the xray spurs work? Considering the Axon DTS spurs
Originally Posted by angrymelon View Post
I'm not sure about the Xray spurs. I was using the white Robinson Racing spurs at one point.

https://www.towerhobbies.com/cgi-bin/wti0001p?&I=LXYGN3

I believe I switched to 64 pitch, but they were also Kimbrough, just black in color. Let me dig out my TC3 and see.
Originally Posted by SteveM View Post
The stock setup is a 48 pitch 72 tooth spur.
Right, I think in the end I switched to the 64 pitch so I could run a much larger pinion gear to get the FDR low enough, as compared to the 48 pitch spurs.
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Old 05-17-2020, 03:33 PM
  #12216  
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Originally Posted by angrymelon View Post
Right, I think in the end I switched to the 64 pitch so I could run a much larger pinion gear to get the FDR low enough, as compared to the 48 pitch spurs.
I'm not sure how 64p would help with that. Both pitches come with large pinion and small spur options.
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Old 05-17-2020, 03:54 PM
  #12217  
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Originally Posted by gigaplex View Post
I'm not sure how 64p would help with that. Both pitches come with large pinion and small spur options.
But a 72T 64 pitch spur is much smaller than a 72T 48 pitch spur is it not? Because of that, with a 72T 64 pitch spur I could fit a much larger pinion than with a 72T 48 pitch spur. Granted you can run a small 48 pitch spur like a 52T, but if memory serves, those were harder to come by, and you don't get the potential benefits of the smaller gear pitch as well.
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Old 05-17-2020, 05:08 PM
  #12218  
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ty all for the responses. you've answered all my questions. can't wait to get back racing
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Old 05-17-2020, 05:10 PM
  #12219  
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Originally Posted by angrymelon View Post
But a 72T 64 pitch spur is much smaller than a 72T 48 pitch spur is it not? Because of that, with a 72T 64 pitch spur I could fit a much larger pinion than with a 72T 48 pitch spur. Granted you can run a small 48 pitch spur like a 52T, but if memory serves, those were harder to come by, and you don't get the potential benefits of the smaller gear pitch as well.
That's why you use a 54 or 55T 48p spur to replace a 72T 64p spur. Take your 64 pitch gear, divide the tooth count by 64 then multiply by 48, and you get your equivalent sized 48 pitch gear. You never just look for identical tooth counts when changing pitch.

I have a 55T 48p Robinson Racing spur in my TC3. When I fit my 43T pinion, I get down to a 3.2 ratio.

Regarding the benefits of smaller pitched gears, sure. That's a valid reason. "48p won't fit" is not.
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Old 05-17-2020, 08:00 PM
  #12220  
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Originally Posted by gigaplex View Post
That's why you use a 54 or 55T 48p spur to replace a 72T 64p spur. Take your 64 pitch gear, divide the tooth count by 64 then multiply by 48, and you get your equivalent sized 48 pitch gear. You never just look for identical tooth counts when changing pitch.

I have a 55T 48p Robinson Racing spur in my TC3. When I fit my 43T pinion, I get down to a 3.2 ratio.

Regarding the benefits of smaller pitched gears, sure. That's a valid reason. "48p won't fit" is not.
I must've remembered incorrectly. For some reason I thought there were 48P size limitations to get down into super low FDRs due to motor mount not having enough adjustment. That and not having as granular of ratio changes. If not, party on
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Old Yesterday, 05:44 PM
  #12221  
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Anyone still have their TC3 center one way shaft they want to sell
Please PM Thanks
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