Jump to content




Photo

Air gap and arm diameter for 16D and S16D


  • Please log in to reply
6 replies to this topic

#1 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 234 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 13 March 2020 - 12:09 AM

What is a good air gap to run? The set-up has a .574" AG now. So should I get a .540" dia or a .560" dia armature?

 

Thanks.


Earl Anderson




#2 Zippity

Zippity

    Posting Leader

  • Full Member
  • PipPipPipPipPipPipPip
  • 4,859 posts
  • Joined: 05-March 06
  • Gender:Male
  • Location:Wellington, New Zealand

Posted 13 March 2020 - 12:23 AM

Go for a large diameter armature.

 

That's what Monty Ohren always recommended :) 


Ron Thornton

#3 Bill from NH

Bill from NH

    Age scrubs away speed!

  • Full Member
  • PipPipPipPipPipPipPipPip
  • 11,136 posts
  • Joined: 02-August 07
  • Gender:Male
  • Location:New Boston, NH

Posted 13 March 2020 - 07:08 AM

I don't think there is any universal package on the "right way " to build a 16D motor.  .540 was a "fat" C-can arm & .560 was a "fat" D-can arm. I don't know what you're looking at now. Any motor isn't necessarily going to run the same on every track you try it. It's apt to be great on one track, a dog on another. I'd build at least a couple motors with different combinations to see how each ran on my particular track. Then go from there. At one time, there was a .585 min hole size for 16D's. I don't know if that rule (maybe a USRA rule?) still exists, but maybe your raceway doesn't use it if it does.


Bill Fernald
 

I intend to live forever!  So far, so good.  :laugh2:  :laugh2: 


#4 Danny Zona

Danny Zona

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,303 posts
  • Joined: 27-July 12
  • Gender:Male
  • Location:Holly Hill (DaytonaBch), FL

Posted 13 March 2020 - 07:25 AM

I don't think there is any universal package on the "right way " to build a 16D motor.  .540 was a "fat" C-can arm & .560 was a "fat" D-can arm. I don't know what you're looking at now. Any motor isn't necessarily going to run the same on every track you try it. It's apt to be great on one track, a dog on another. I'd build at least a couple motors with different combinations to see how each ran on my particular track. Then go from there. At one time, there was a .585 min hole size for 16D's. I don't know if that rule (maybe a USRA rule?) still exists, but maybe your raceway doesn't use it if it does.

The minimum was .575 for 16Ds in USRA back in the day. At least when I raced.
Test, test, test and go test some more.
You're never fast enough!!! 💯 Lap times are the only truth. Everything else is just theory.

Preparation leads to separation.

KELLY RACING 😎

#5 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 234 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 13 March 2020 - 10:07 AM

This is a play motor so a 574 AG with a 560 arm will work , so a 007 per aid AG is good
Earl Anderson

#6 Bill from NH

Bill from NH

    Age scrubs away speed!

  • Full Member
  • PipPipPipPipPipPipPipPip
  • 11,136 posts
  • Joined: 02-August 07
  • Gender:Male
  • Location:New Boston, NH

Posted 13 March 2020 - 11:16 AM

You're right Danny, thanks for the correction.

 

Earl, try what you mentioned & if it goes good, leave it alone.  We tried running scale cars using C-cans with a tight hole & Contender or Super Wasp arms. They ran punchy, so we opened them back up, but the magnets were stronger than 16Ds.


  • Danny Zona likes this

Bill Fernald
 

I intend to live forever!  So far, so good.  :laugh2:  :laugh2: 


#7 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 234 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 13 March 2020 - 12:24 PM

Thanks Bill for the info
Earl Anderson





Electric Dreams Online Shop