Welcome! Please use the navigational links on your left to explore our website.

Company Logo Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts

Community
Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
TractorLinks.com
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
  
Ford 9N, 2N & 8N Discussion Forum
Order Ford 8N Parts Online

8N51 Spark plug voltage

Welcome Guest, Log in or Register
Author  [Modern View]
btzj02

05-21-2020 19:18:26




Report to Moderator

Trying to wrap my head around the advantages of a 12 volt system. Has anyone actually measured the voltage at the spark plug wires comparing a 6 volt to a 12 volt system? All the literature indicates, to my in experienced brain, that whether you have a 12 volt or 6 volt system the voltage at the spark plug is basically the same due to resistors on primary side of ignition wiring or a 12 volt coil that is wound to limit the current through the points. Is there any 12 volt system that actually raises the Spark plug voltage significantly above the voltage on the original 6 volt system?

[Log in to Reply]   [No Email]
Btzj02

05-22-2020 19:21:56




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to btzj02, 05-21-2020 19:18:26  
Thanks guys I think you all may have indirectly confirmed what I was thinking. I like the 6 volt system but I was trying to learn if a 12 volt system would increase engine performance. After reading what I could find it seemed as though a 12 volt conversion does not impact the energy available at the spark plug. Thus not increasing engine performance. Some information I ran into talked about electronic ignitions that had "Dwell", (black box voodoo magic to me), and other guys that did not install the resistor and then promptly blew the top off there coil. Since I don't plan on installing an 8 Track on the old girl I will stick with the 6 volt system.

[Log in to Reply]  [No Email]
TheOldHokie

05-22-2020 14:38:21




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to btzj02, 05-21-2020 19:18:26  
Quoting Removed, click Modern View to see

And seemingly add to that some confusion about what's happening inside the coil....
"Hence a positive ground system should be different than a Neg ground system."

TOH



[Log in to Reply]  [No Email]
JMOR

05-22-2020 13:53:49




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to btzj02, 05-21-2020 19:18:26  
Quoting Removed, click Modern View to see :cry:
.editing, omissions, out of context.....just like the 6 o'clock news!



[Log in to Reply]  [No Email]
TheOldHokie

05-22-2020 13:25:07




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to btzj02, 05-21-2020 19:18:26  
Quoting Removed, click Modern View to see

Read JMOR'S response again - specifically the part you omitted in the quote.

TOH



[Log in to Reply]  [No Email]
TheOldHokie

05-22-2020 06:26:35




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to btzj02, 05-21-2020 19:18:26  
Quoting Removed, click Modern View to see

If it were just that simple. A brief and not overly technical discussion of gasoline engine spark ignition energy:

https://www.researchgate.net/publication/322538158_Review_on_performance_of_High_energy_ignition_techniques/link/5a5edd360f7e9b4f783bb8ba/download

You might find the results of approach number 6 mildly interesting.

TOH

[Log in to Reply]  [No Email]
Ultradog MN

05-22-2020 04:47:43




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to btzj02, 05-21-2020 19:18:26  
I've never considered the spark itself as an advantage to 12V.
Both voltages will produce plenty of fire to cause combustion.
It's other things that give 12V a leg up.
Standarization, faster cranking speed and a simpler, more reliable charging system to name a few.



[Log in to Reply]  [No Email]
JMOR

05-21-2020 22:37:38




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to btzj02, 05-21-2020 19:18:26  
Quoting Removed, click Modern View to seePoarity of the spark has NOTHING to do with the 6v or 12v......it is all about how the coil is wired into the system. Next, HV also has little or nothing to do with 6v/12v....the voltage of either will rise to whatever is necessary to arc over the spark gap.



[Log in to Reply]  [No Email]
Bruce(OR)

05-22-2020 13:04:39




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to JMOR, 05-21-2020 22:37:38  
"Poarity of the spark has NOTHING to do with the 6v or 12v "
Unless you consider the theory of electricity, I believe in my increasing oncoming doddering older age, that says neg flows to positive.
Hence a positive ground system should be different than a Neg ground system.

[Log in to Reply]  [No Email]
Bruce(OR)

05-21-2020 22:31:07




Report to Moderator
 Re: 8N51 Spark plug voltage in reply to btzj02, 05-21-2020 19:18:26  
MSD for a start on that question. It is my weak minded understanding that the spark fires from the center to the electrode on 12V neg ground. 6V pos round is the opposite direction. If you up the coil and widen the plug gap you should see an increase in voltage. More oomph needed to jump a wider gap.
More voltage, more power, lower emissions, better mileage. I know you are concerned about mileage and emissions. Electricity is like most people. Going to do the least amount of energy to get the job done.
All it has to do is jump a .025 gap. Crank the gap up to .045 and the voltage should be going up. 6 or 12V on a .025 gap should not be noticeable. 6V on a .045 gap might not fire the plugs. 12V on a .045 gap will fire. 12V should not have a problem until up around .080 gap.
6V on a .080 gap will not fire.

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). We have the parts you need to repair your tractor - the right parts. Our fast shipping, low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2020 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy