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Gearing help...


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#1 40degreerake

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Posted 11 February 2020 - 04:54 PM

Can you people of this great forum help me out with gearing for these three retro classes?

Stock Car
Can Am
F1

Theyve gotta be different due to wheel size. *shrug*
Thanks in advance.
Rick Peller




#2 Pablo

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Posted 11 February 2020 - 05:01 PM

All three classes use .8125 OD minimum rear wheels and to answer the question we need to know what motor you are running. If It's IRRA®, and you are using JK Hawk Retro motors, gearing is pretty standard across the board, 9/28.

 

If you are racing RETRO rules, the Pro Slot FK motors are mandated 8T pinion and also use about a 28T crown.


Paul Wolcott

#3 40degreerake

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Posted 11 February 2020 - 05:12 PM

IRRA with a JK Hawk Retro.
Rick Peller

#4 TG Racing

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Posted 11 February 2020 - 05:43 PM

Depends on the track, mostly 9/27 or 28.  


Thom Greene

#5 Noose

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Posted 11 February 2020 - 05:46 PM

For F1, CanAm and GTC most use 9/27.

For Stock Cars 8/28 for better control.


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Joe "Noose" Neumeister
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#6 Ramcatlarry

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Posted 11 February 2020 - 06:25 PM

Flat track likes the 8T as well.


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#7 40degreerake

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Posted 11 February 2020 - 06:59 PM

Thank you. Very clear and concise. Two crowns, two pinions to cover all three.
Rick Peller

#8 John Streisguth

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Posted 11 February 2020 - 07:04 PM

What Noose said.  Sometimes on a shorter track I'll bump the crown up a tooth


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#9 Rotorranch

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Posted 11 February 2020 - 07:21 PM

3 crowns, 2 pinions should cover most anything.

 

8 and 9 pinion, 37, 38, 39 crowns.

 

Rotor


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#10 slotcarone

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Posted 11 February 2020 - 09:28 PM

3 crowns, 2 pinions should cover most anything.

 

8 and 9 pinion, 37, 38, 39 crowns.

 

Rotor

27, 28, 29!


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#11 Rotorranch

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Posted 12 February 2020 - 06:36 AM

27, 28, 29!

DOH!!!

 

Brain fart!

 

Rotor


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