The Ford Barn

louisb · 10-17-2013, 06:25 AM

I have an original set of Johnson lifters that came in my 8RT. Is it worth having these resurfaced vs buying new ones from Reds? Any advantages or disadvantages between the two?

Edit: that title was supposed to be regrind. Thanks auto-incorrect.

Thanks,

--louis

Ol' Ron · 10-17-2013, 10:04 AM

It depends on who does it. I use JWL ashe been doing this for years and has the proper equipment to doit.

russcc · 10-17-2013, 07:21 PM

If I understand it correctly, most cam grinders do it. I also understand that the convex radius that should be on the bottom of the lifter is based on very large diameter circle to give it that almost imperceptible radius.

V8COOPMAN · 10-17-2013, 07:41 PM

I believe 96" radius. DD

louisb · 10-17-2013, 07:55 PM

Quote:

Originally Posted by russcc

If I understand it correctly, most cam grinders do it. I also understand that the convex radius that should be on the bottom of the lifter is based on very large diameter circle to give it that almost imperceptible radius.

That may explain why I couldn't detect any curve when I put two face to face and tried to rock them.

Thanks,

--louis

Pete · 10-17-2013, 09:32 PM

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The original Ford spec was 96 inch radius.
Flathead Ford lifters were faced flat up to 1949.
You can tell the flat ones (new) by the circular grind marks running all the way across the face.
Actually Ford never had any orbital or spherical grinding equipment so the later lifters were ground tapered as most lifters are today.
The Ford lifters had .0002 taper. The cam lobes are tapered to match so the lifter rotates.

10-17-2013, 06:25 AM	#1
louisb Senior Member Join Date: Nov 2011 Location: Tallahassee, FL Posts: 175	Lifters regained vs new I have an original set of Johnson lifters that came in my 8RT. Is it worth having these resurfaced vs buying new ones from Reds? Any advantages or disadvantages between the two? Edit: that title was supposed to be regrind. Thanks auto-incorrect. Thanks, --louis Last edited by louisb; 10-17-2013 at 06:34 AM.

10-17-2013, 10:04 AM	#2
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: Lifters regained vs new It depends on who does it. I use JWL ashe been doing this for years and has the proper equipment to doit.

10-17-2013, 07:21 PM	#3
russcc Senior Member Join Date: May 2010 Posts: 2,871	Re: Lifters regained vs new If I understand it correctly, most cam grinders do it. I also understand that the convex radius that should be on the bottom of the lifter is based on very large diameter circle to give it that almost imperceptible radius.

10-17-2013, 07:41 PM	#4
V8COOPMAN Senior Member Join Date: May 2010 Location: East Shore of LAKE HOUSTON Posts: 11,113	Re: Lifters regained vs new I believe 96" radius. DD __________________ *Click Links Below* __ ▼ *'35-'36 W/8BA & MECHANICAL FAN* *T5 W/TORQUE TUBE*

10-17-2013, 09:32 PM	#6
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,408	Re: Lifters regained vs new Sponsored Links (Register now to hide all advertisements) The original Ford spec was 96 inch radius. Flathead Ford lifters were faced flat up to 1949. You can tell the flat ones (new) by the circular grind marks running all the way across the face. Actually Ford never had any orbital or spherical grinding equipment so the later lifters were ground tapered as most lifters are today. The Ford lifters had .0002 taper. The cam lobes are tapered to match so the lifter rotates.