Jump to content




Photo

Pro Slot Big Dog gearing help


  • Please log in to reply
7 replies to this topic

#1 Roy Lievanos

Roy Lievanos

    Backmarker

  • Full Member
  • PipPip
  • 84 posts
  • Joined: 27-August 16
  • Gender:Male
  • Location:Santa Ana, CA

Posted 02 January 2018 - 05:59 PM

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.


2017 Western States " Retro Hawk F class " Champion
2017 USRA Div 1 Nats " F class " Champion
Thank you John and Dee Hale -Santa Ana Raceway circa 1968




#2 gotboostedvr6

gotboostedvr6

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,460 posts
  • Joined: 19-July 11
  • Gender:Male
  • Location:Mt. Laurel

Posted 02 January 2018 - 09:54 PM

I'd start with an 8 tooth.

DZ?
Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free. - Ronald Regan #40 (1911 - 2004)

David Parrotta

#3 Milkman

Milkman

    Mid-Pack Racer

  • Full Member
  • PipPipPip
  • 185 posts
  • Joined: 07-April 07
  • 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!!

#4 Danny Zona

Danny Zona

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,146 posts
  • Joined: 27-July 12
  • Gender:Male
  • Location:Holly Hill (DaytonaBch), FL

Posted 03 January 2018 - 09:19 AM

I'd start with an 8 tooth.

DZ?

We used 10-36 or 37 with .730-.750 sized tires on the big dog arms racing on hill climbs.

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!!! 💯

Luck is the residue of design.

Be a fountain not a drain.

It's not about being right, it's getting it right.

#5 stemmy

stemmy

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,028 posts
  • Joined: 26-September 12
  • 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

gotboostedvr6

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,460 posts
  • Joined: 19-July 11
  • Gender:Male
  • Location:Mt. Laurel

Posted 03 January 2018 - 10:29 AM

Blair,

What size tire? That makes a huge difference.
Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free. - Ronald Regan #40 (1911 - 2004)

David Parrotta

#7 stemmy

stemmy

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,028 posts
  • Joined: 26-September 12
  • Gender:Male
  • Location:Easton, PA

Posted 03 January 2018 - 01:41 PM

765.
Blair Stem

#8 Roy Lievanos

Roy Lievanos

    Backmarker

  • Full Member
  • PipPip
  • 84 posts
  • Joined: 27-August 16
  • 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.
2017 Western States " Retro Hawk F class " Champion
2017 USRA Div 1 Nats " F class " Champion
Thank you John and Dee Hale -Santa Ana Raceway circa 1968





Electric Dreams Online Shop