spark plug gap

qflash · 02-09-2018, 07:22 PM

Recommended plug gap for MSD 7-AL3 with Autolite racing plugs in 307 Olds stocker.
Thanks,
Ron

GTX JOHN · 02-10-2018, 02:43 AM

We run .035. on AR plugs
More does not seen to help and just puts
more strain on the the rest of ignition system in
my opinion.

FireSale · 02-10-2018, 01:22 PM

I have that box on a 302 Ford. At .050 it was hard to start. Improved a lot at .035. Autolite plugs, too.

Dave Noll · 02-11-2018, 02:02 AM

.015" difference in spark gap makes a negligible difference in spark output as observed on an Oscilloscope.

02-09-2018, 07:22 PM	#1
qflash Junior Member Join Date: Apr 2013 Location: Raised in PA, Live in San Angelo, TX Posts: 68 Likes: 0 Liked 0 Times in 0 Posts	spark plug gap Recommended plug gap for MSD 7-AL3 with Autolite racing plugs in 307 Olds stocker. Thanks, Ron

02-10-2018, 02:43 AM	#2
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,732 Likes: 2,798 Liked 2,479 Times in 697 Posts	Re: spark plug gap We run .035. on AR plugs More does not seen to help and just puts more strain on the the rest of ignition system in my opinion. __________________ John Irving 741 Stock 741 Super Stock Last edited by GTX JOHN; 02-10-2018 at 02:50 AM.

02-10-2018, 01:22 PM	#3
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 126 Posts	Re: spark plug gap I have that box on a 302 Ford. At .050 it was hard to start. Improved a lot at .035. Autolite plugs, too. __________________ Dale Shearon 68 Mustang 6394

02-11-2018, 02:02 AM	#4
Dave Noll Senior Member Join Date: Nov 2007 Location: Div. 6, Eastern, WA Posts: 709 Likes: 2,668 Liked 238 Times in 111 Posts	Re: spark plug gap .015" difference in spark gap makes a negligible difference in spark output as observed on an Oscilloscope. __________________ Dave Noll, EF/S ,?/SA 6526