(reground) cam went flat? - ZR-1 Net Registry Forums

Paul Workman · 01-27-2009

Pete's comment about wiping a cam lobe sent a shiver up my spine - as I'm considering a regrind next year...

What I know about metallurgy you could stick in a thimble and it would still rattle around. So, it occurred to me that when a cam is reground, certainly the case hardening is removed and the surface hardening has to be redone or the opportunity to wipe a lobe comes to mind.

Well, Comp Cams provides an additive to replace the "good stuff" (zinc, etc) left out of today's oils - I buy it over the counter at "Winner's Circle" in Joliet. Having just replaced a "wiped" cam in my wife's 69 Vette I rather think it might be a good idea to start putting it in the Z, in addition to the AMO 10W-40 recommended by Marc, especially if running a reground cam to the rpm Pete does.

All that said, I'm reminded too of the advantages some claim by using tungsten disulphide (WS2) coatings on some parts. (More research in indicated, methinks.)

But, I leave the discussion of lubrication to the experts, except to say I don't see how adding the additive would hoit!

What say U?

P.

01-27-2009	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	(reground) cam went flat? Pete's comment about wiping a cam lobe sent a shiver up my spine - as I'm considering a regrind next year... What I know about metallurgy you could stick in a thimble and it would still rattle around. So, it occurred to me that when a cam is reground, certainly the case hardening is removed and the surface hardening has to be redone or the opportunity to wipe a lobe comes to mind. Well, Comp Cams provides an additive to replace the "good stuff" (zinc, etc) left out of today's oils - I buy it over the counter at "Winner's Circle" in Joliet. Having just replaced a "wiped" cam in my wife's 69 Vette I rather think it might be a good idea to start putting it in the Z, in addition to the AMO 10W-40 recommended by Marc, especially if running a reground cam to the rpm Pete does. All that said, I'm reminded too of the advantages some claim by using tungsten disulphide (WS2) coatings on some parts. (More research in indicated, methinks.) But, I leave the discussion of lubrication to the experts, except to say I don't see how adding the additive would hoit! What say U? P.