Hello.
I have a stock Big Dog motor with can bearing. Can anyone recommend a ballpark gear ratio using .790" tires on a Gerding King high-speed track. It will be used in an anglewinder chassis.
I don't know RPM on this motor.
Pro Slot Big Dog gearing help
Started by
Roy Lievanos
, Jan 02 2018 05:59 PM
7 replies to this topic
#1
Roy Lievanos
-
- Full Member
-
- 262 posts Joined: 27-August 16
On The Lead Lap
- Gender:Male
- Location:Santa Ana, CA
Posted 02 January 2018 - 05:59 PM
2023 Barnburner OMB TQ
2022 Western States HB12 Champion
2021 NASRA OMB National Champion
2021 NASRA OMB National Lap World Record
2017 USRA Div 1 Nats “F” class National Champion
2017 Western States "Retro Hawk F class" Champion
Thank you, John and Dee Hale - Santa Ana Raceway circa 1962
#2
gotboostedvr6
-
- Full Member
-
- 2,314 posts Joined: 19-July 11
Posting Leader
- Gender:Male
- Location:Mt. Laurel
Posted 02 January 2018 - 09:54 PM
I'd start with an 8 tooth.
DZ?
DZ?
David Parrotta
#3
Milkman
-
- Full Member
-
- 199 posts Joined: 07-April 07
Mid-Pack Racer
- Gender:Male
- Location:Houston, TX
Posted 03 January 2018 - 08:26 AM
We've been racing Big Dog motors in Dallas for several years in the retro angle winder class (Retro Pro). I recommend gearing 8/37 - 8/39 64pitch. I ran this gearing on the Gerding King track at first and when Dallas Slot Cars replaced the King track with their current flat track this gearing worked well also.
Ken Stevens
Speedstar - Go fast, stay on, do laps!!
Speedstar - Go fast, stay on, do laps!!
#4
Danny Zona
-
- Full Member
-
- 1,535 posts Joined: 27-July 12
Checkered Flag in Hand
- Gender:Male
- Location:Holly Hill (Daytona Beach), FL
Posted 03 January 2018 - 09:19 AM
We used 10-36 or 37 with .730-.750 sized tires on the big dog arms racing on hill climbs.I'd start with an 8 tooth.
DZ?
They ran hot with a 10 pinion though and we only use 2 Min heats also. We definitely pushed the hot issue with that gearing.
That was in a flexi chassis with gtp bodies.
Test, test, test and go test some more.
You're never fast enough!!! 💯
Preparation leads to separation.
Success is never owned but rented and rent is due everyday.
KELLY RACING 😎
You're never fast enough!!! 💯
Preparation leads to separation.
Success is never owned but rented and rent is due everyday.
KELLY RACING 😎
#5
stemmy
-
- Partial Member
-
- 1,095 posts Joined: 26-September 12
Checkered Flag in Hand
- Gender:Male
- Location:Easton, PA
Posted 03 January 2018 - 09:43 AM
13/42 72 pitch . They do run hot with that gearing too.
Blair Stem
#6
gotboostedvr6
-
- Full Member
-
- 2,314 posts Joined: 19-July 11
Posting Leader
- Gender:Male
- Location:Mt. Laurel
Posted 03 January 2018 - 10:29 AM
Blair,
What size tire? That makes a huge difference.
What size tire? That makes a huge difference.
David Parrotta
#7
stemmy
-
- Partial Member
-
- 1,095 posts Joined: 26-September 12
Checkered Flag in Hand
- Gender:Male
- Location:Easton, PA
Posted 03 January 2018 - 01:41 PM
765.
Blair Stem
#8
Roy Lievanos
-
- Full Member
-
- 262 posts Joined: 27-August 16
On The Lead Lap
- Gender:Male
- Location:Santa Ana, CA
Posted 07 January 2018 - 03:32 AM
Thanks everyone for your input. I will try ratios once shake this Flu and able to return to the track.
2023 Barnburner OMB TQ
2022 Western States HB12 Champion
2021 NASRA OMB National Champion
2021 NASRA OMB National Lap World Record
2017 USRA Div 1 Nats “F” class National Champion
2017 Western States "Retro Hawk F class" Champion
Thank you, John and Dee Hale - Santa Ana Raceway circa 1962
