The Ford Barn

ls0774 · 11-05-2012, 06:36 PM

I have a 27 Tudor Sedan 12 volt with original 4 cyl. engine. I am installing a distributor and 12 volt coil, plus a 12 volt alternator and need to know what to gap the plugs at. I am thinking .30 or .35, but not for sure. Does anyone know?

Sparky
Grain Valley Missouri

jackdaron · 11-05-2012, 09:26 PM

30 thou sounds about right.

rosenkranswa · 11-06-2012, 09:28 AM

I gap the Model A's at .035, but I thought the Model T's were more like 0.022. I'm running 6v systems, does the system voltage make a difference on plug gap?

Susanne · 11-07-2012, 08:58 PM

Model T "factory spec" is .03125", or to put it in the parleyance of back then, 1/32 o an inch. That's with Champion X's, or also with Splitdorfs, or any other original plug.

Royce P · 11-09-2012, 09:49 AM

Sponsored Links (Register now to hide all advertisements)

The instructions included inside the box of every Champion X plug tells the installer to set the gap at .025" for Model T Ford. I followed the instructions years ago and have not had a plug foul since.

11-05-2012, 06:36 PM	#1
ls0774 Junior Member Join Date: Oct 2011 Location: Grain Valley, MO Posts: 4	Spark Plug GAP I have a 27 Tudor Sedan 12 volt with original 4 cyl. engine. I am installing a distributor and 12 volt coil, plus a 12 volt alternator and need to know what to gap the plugs at. I am thinking .30 or .35, but not for sure. Does anyone know? Sparky Grain Valley Missouri

11-05-2012, 09:26 PM	#2
jackdaron Senior Member Join Date: May 2010 Location: Brownsburg,In. Posts: 383	Re: Spark Plug GAP 30 thou sounds about right.

11-06-2012, 09:28 AM	#3
rosenkranswa Senior Member Join Date: Oct 2012 Location: Malvern, PA Posts: 361	Re: Spark Plug GAP I gap the Model A's at .035, but I thought the Model T's were more like 0.022. I'm running 6v systems, does the system voltage make a difference on plug gap? __________________ Wayne @ Barb Malvern '19 T Speedster '26 T Touring '29 A Roadster '30 AA Stakebed '30 A Pickup '30 A Town Sedan '31 A Station Wagon '38 Columbia Girls bike (WWII) '40 Elgin Boys bike (WWII) '42 Super Deluxe Tudor '42 Willys MB Jeep '43 Willys MBT Trailer '43 M3A4 Hand Cart '43 Harley Davidson 42WLA with sidecar

11-07-2012, 08:58 PM	#4
Susanne Junior Member Join Date: Sep 2012 Posts: 16	Re: Spark Plug GAP Model T "factory spec" is .03125", or to put it in the parleyance of back then, 1/32 o an inch. That's with Champion X's, or also with Splitdorfs, or any other original plug.

11-09-2012, 09:49 AM	#5
Royce P Senior Member Join Date: May 2010 Location: Tulsa OK Posts: 476	Re: Spark Plug GAP Sponsored Links (Register now to hide all advertisements) The instructions included inside the box of every Champion X plug tells the installer to set the gap at .025" for Model T Ford. I followed the instructions years ago and have not had a plug foul since.