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.
Gearing help...
Started by
40degreerake
, Feb 11 2020 04:54 PM
10 replies to this topic
#1
40degreerake
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Posted 11 February 2020 - 04:54 PM
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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For Stock Cars 8/28 for better control.
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- Ramcatlarry and Half Fast like this
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.
Larry D. Kelley, MA
retired raceway owner... Raceworld/Ramcat Raceways
racing around Chicago-land
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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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Johnny VW
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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
- crazyphysicsteacher likes this
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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
Jeff Chambers
"Kinky Kar"
"Kinky Kar"
#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!
- Ramcatlarry, NSwanberg and crazyphysicsteacher like this
Mike Katz
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#11
Rotorranch
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Posted 12 February 2020 - 06:36 AM
27, 28, 29!
DOH!!!
Brain fart!
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Jeff Chambers
"Kinky Kar"
"Kinky Kar"
