The Ford Barn

wbs · 11-05-2015, 10:47 AM

this may be of interest
coil 2.0 int resis 12v used on texas t distr.

coil to distr removed from distr and held at increasing dist. frm ground-no rotor to go thru

set up1 .6 ext resist jump 5/16"
2.75 v drop across ext resis 8.0v across coil primary winding
don't know where missing v1.2 v went
4amps used,10.25 watts across resis

set up2 1.3 ext resist jump 1/4"
6.3 v drop across ext resis ?5.7 across coil primary wndg
3.6 amp 17 watt
-----------------
coil wire plugged into distr top, plug removed with wire from distr attached - the spark had to go thru rotor to get to plug
set up 3 1.3 ohm
plug fired intermittantly
setup 4 .6 ohm plug fired consistant
------
in none of the above did coil get hot to touch

Royce P · 11-06-2015, 09:59 AM

Adding the 1.6 volt external resistor ought to improve the life expectancy of the coil a lot. The way they are out of the box they burn out quickly.

wbs · 11-07-2015, 10:24 AM

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thank u-i've learned alot from you and bubba- on your and bubba's coil, can you feel any heat on coil with your hand? i can feel a slight warmth when i drop the voltasge to the coil with external resis. the largest size of the ext resis was chosen which would still give me a visible spark with the plug pulled and put on ther engine block.

11-05-2015, 10:47 AM	#1
wbs Senior Member Join Date: Nov 2013 Posts: 322	coil experiment this may be of interest coil 2.0 int resis 12v used on texas t distr. coil to distr removed from distr and held at increasing dist. frm ground-no rotor to go thru set up1 .6 ext resist jump 5/16" 2.75 v drop across ext resis 8.0v across coil primary winding don't know where missing v1.2 v went 4amps used,10.25 watts across resis set up2 1.3 ext resist jump 1/4" 6.3 v drop across ext resis ?5.7 across coil primary wndg 3.6 amp 17 watt ----------------- coil wire plugged into distr top, plug removed with wire from distr attached - the spark had to go thru rotor to get to plug set up 3 1.3 ohm plug fired intermittantly setup 4 .6 ohm plug fired consistant ------ in none of the above did coil get hot to touch

11-06-2015, 09:59 AM	#2
Royce P Senior Member Join Date: May 2010 Location: Tulsa OK Posts: 476	Re: coil experiment Adding the 1.6 volt external resistor ought to improve the life expectancy of the coil a lot. The way they are out of the box they burn out quickly. __________________ 1910 Touring 1914 Touring 1915 Touring 1917 Torpedo Runabout

11-07-2015, 10:24 AM	#3
wbs Senior Member Join Date: Nov 2013 Posts: 322	Re: coil experiment Sponsored Links (Register now to hide all advertisements) thank u-i've learned alot from you and bubba- on your and bubba's coil, can you feel any heat on coil with your hand? i can feel a slight warmth when i drop the voltasge to the coil with external resis. the largest size of the ext resis was chosen which would still give me a visible spark with the plug pulled and put on ther engine block.