Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 02-20-2017, 11:53 AM   #1
Bill Lee/Virginia
Senior Member
 
Join Date: May 2010
Posts: 294
Default Inverted Coil Performance?

I recently converted my Cabriolet to 12 volt negative ground. I want to install a 12 volt epoxy filled coil (with internal resistor) in the upside position.

Question: Will the upside position of the coil degrade its performance?

Bill Lee/Virginia Peninsula
Bill Lee/Virginia is offline   Reply With Quote
Old 02-20-2017, 12:21 PM   #2
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,320
Default Re: Inverted Coil Performance?

No problem. Did you mean with the tower UP, when you say upside?

Anyway, with an epoxy filled coil, I don't see a problem in any position.
Tom Wesenberg is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 02-20-2017, 01:35 PM   #3
hardtimes
Senior Member
 
hardtimes's Avatar
 
Join Date: May 2010
Location: South California
Posts: 5,780
Default Re: Inverted Coil Performance?

Quote:
Originally Posted by Bill Lee/Virginia View Post
I recently converted my Cabriolet to 12 volt negative ground. I want to install a 12 volt epoxy filled coil (with internal resistor) in the upside position.

Question: Will the upside position of the coil degrade its performance?

Bill Lee/Virginia Peninsula
Hey Bill,
'upside' is open to Q ? Upside down or tower up, you will be ok with this coil. I use same coil for years with tower DOWN and have had excellent coil performance.
hardtimes is offline   Reply With Quote
Old 02-20-2017, 02:48 PM   #4
Bill Lee/Virginia
Senior Member
 
Join Date: May 2010
Posts: 294
Default Re: Inverted Coil Performance?

I want to install the coil with the tower down, the same as original Model A coil.

Many thanks for the info and advice.

Bill Lee/Virginia Peninsula
Bill Lee/Virginia is offline   Reply With Quote
Old 02-20-2017, 05:31 PM   #5
Synchro909
Senior Member
 
Synchro909's Avatar
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 4,213
Default Re: Inverted Coil Performance?

With an epoxy filled coil, you'll be fine mounting it with the terminals down. Not so with an oil filled one.
Don't ask how I know.
__________________
I want to live forever.
So far so good.
Synchro909 is offline   Reply With Quote
Old 02-20-2017, 05:47 PM   #6
noboD
Senior Member
 
Join Date: May 2010
Posts: 215
Default Re: Inverted Coil Performance?

Look at every air cooled VW ever made. They never had a problem with the tower down.
noboD is offline   Reply With Quote
Old 02-20-2017, 08:10 PM   #7
Dick Steinkamp
Senior Member
 
Dick Steinkamp's Avatar
 
Join Date: Apr 2016
Location: Bellingham, WA
Posts: 1,103
Default Re: Inverted Coil Performance?

Quote:
Originally Posted by Synchro909 View Post
With an epoxy filled coil, you'll be fine mounting it with the terminals down. Not so with an oil filled one.
Don't ask how I know.
Isn't a stock Model A coil oil filled?
__________________
All steel from pedal to wheel
Dick Steinkamp is offline   Reply With Quote
Old 02-20-2017, 08:40 PM   #8
Fullraceflathead
Senior Member
 
Fullraceflathead's Avatar
 
Join Date: May 2012
Location: Riverside, Ca
Posts: 899
Default Re: Inverted Coil Performance?

Original coils were Tar filled.
Inverting a oil filled coil may overheat as their is an air pocket inside to allow for expansion.
__________________
"If I asked people what they wanted they would have said faster horses."
-Henry Ford

"Primitive technology is not a design flaw"


1928 Ford Model A Roadster Pickup
1930 Gordon Smith Air Compressor
1941 Willy's Pickup
1960 Thunderbird-For Sale
1964 Buick Riviera 2x4 425
1965 Pontiac GTO, 455 Super Duty
2004 Dodge Ram SRT-10, V-10 Viper
1977 Charger Jet Boat,460 Ford,Jacuzzi Jet
Front Engine Nostalgia Dragster,Supercharged 296 "Fullrace Flathead" Ford
Engine Build up on DVD ask
Fullraceflathead is offline   Reply With Quote
Old 02-20-2017, 08:42 PM   #9
blgitn
Senior Member
 
blgitn's Avatar
 
Join Date: Jun 2011
Location: West Point, VA 23181
Posts: 355
Default Re: Inverted Coil Performance?

I thought so too.
blgitn is offline   Reply With Quote
Old 02-20-2017, 08:49 PM   #10
Kurt in NJ
Senior Member
 
Kurt in NJ's Avatar
 
Join Date: May 2010
Location: on the Littlefield
Posts: 4,655
Default Re: Inverted Coil Performance?

The original A coils I have taken apart were tar filled

The VW upside down coils were oil filled, rarely leaked ---modern production Bosch made in other than Germany I have had leak, the original Lucas coil in my MG is mounted tower down, oil filled and rarely leaked, modern production leaked in a week

My A has a 70s Ricks "show script" coil, it is oil filled and hasn't leaked, it's a regular coil with a cover, has very strong spark----offshore made in the pre china era

I had an epoxy coil X rayed, it looka like there is enough to turn it down to fit inside original coil case
Kurt in NJ is offline   Reply With Quote
Old 02-20-2017, 10:39 PM   #11
Dodge
Senior Member
 
Join Date: Nov 2011
Posts: 1,102
Default Re: Inverted Coil Performance?

I was told by a coil manufacturer that the oil filled can go straight up or straight down
but don't like to go on their sides because the air pocket doesn't cover the coils when
on the side causing the coil to overheat.
Dodge is offline   Reply With Quote
Old 02-20-2017, 10:40 PM   #12
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,320
Default Re: Inverted Coil Performance?

Studebaker mounted the oil filled coil with the tower down, and the only one I saw leak was from a junk yard, and leaked through a rust pit. BTW this is also a 6 volt positive ground car.
Tom Wesenberg is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 01:03 AM.