The Ford Barn

Jim Brierley · 09-24-2023, 12:37 PM

You can get a rough idea by measuring lobe lift. The best way is with a dial indicator, but on a stock or near stock cam you can mic the lobe across the nose (fully open) and at 90 degrees from that point, the difference will give you lift in inches. Most, but not all, touring cams have higher than stock lift. I grind a cam that I call a 'C'. It is just a .339" B cam that I've copied and rounded the nose a bit for longevity, it now has .320" of lobe lift, and it makes a great touring cam. It has slightly more duration than earlier B cams, idles like a stocker and performs very well in the RPM ranges that we tour in.

09-24-2023, 12:37 PM	#16
Jim Brierley Senior Member Join Date: Jun 2010 Location: Temecula, CA Posts: 4,321	Re: A, B or "touring" cam? You can get a rough idea by measuring lobe lift. The best way is with a dial indicator, but on a stock or near stock cam you can mic the lobe across the nose (fully open) and at 90 degrees from that point, the difference will give you lift in inches. Most, but not all, touring cams have higher than stock lift. I grind a cam that I call a 'C'. It is just a .339" B cam that I've copied and rounded the nose a bit for longevity, it now has .320" of lobe lift, and it makes a great touring cam. It has slightly more duration than earlier B cams, idles like a stocker and performs very well in the RPM ranges that we tour in.