Re: Reusing a flat-tappet cam? Wiped lobe risk?
[Re: Mopar72Man]
#2524911
07/21/18 11:20 AM
07/21/18 11:20 AM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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is there an elevated risk for wiping the cam on the second set of new lifters? regularly people rebreakin new lifters on an old cam (when the old lifter(s) went bad or the order mixed up so I'd say you are good. Be sure to get it to fire immediately & takeing out the inner spring & good oil, bring up the RPM, gunning it, the std stuff.
live every 24 hour block of time like it's your last day on earth
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Re: Reusing a flat-tappet cam? Wiped lobe risk?
[Re: RapidRobert]
#2524912
07/21/18 11:24 AM
07/21/18 11:24 AM
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Joined: Jan 2003
Posts: 11,991
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 11,991
Benton, IL.
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It's also a good idea to mark the lifters and spin the engine over with the plugs out so you can check and be sure that all the lifters are rotating. If one or more aren't rotating, you should swap positions until they are all spinning.
Master, again and still
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Re: Reusing a flat-tappet cam? Wiped lobe risk?
[Re: Mopar72Man]
#2524927
07/21/18 11:48 AM
07/21/18 11:48 AM
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Joined: Jan 2003
Posts: 1,255
Columbus, GA
Michael Ecks
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,255
Columbus, GA
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If you're pulling it yourself reusing the lifters is fine so long as you keep them in order. Not sure I would trust a used set even if the seller said they kept them in order I would break in a new set.
So long as the wear pattern on the cam looks good I would actually guess there is less likelyhood of wiping a cam while breaking in new lifters on it.
"The happiness of your life depends upon the quality of
your thoughts" ~ Roman Emperor Marcus Aurelius
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Re: Reusing a flat-tappet cam? Wiped lobe risk?
[Re: Mopar72Man]
#2525097
07/21/18 08:10 PM
07/21/18 08:10 PM
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Joined: Jan 2003
Posts: 25,720
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,720
Rio Linda, CA
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I've reused cams with rust like that, cleaned it off with a soft bristle wire wheel.
The INTERNET, the MISinformation superhighway
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Re: Reusing a flat-tappet cam? Wiped lobe risk?
[Re: Mopar72Man]
#2525113
07/21/18 10:11 PM
07/21/18 10:11 PM
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Joined: May 2015
Posts: 1,134
Lost in Time
Iowan
super stock
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super stock
Joined: May 2015
Posts: 1,134
Lost in Time
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Red scotch brite and 3 in 1 or CRC oil.
Have a great day
Iowan
"obsolete is neat"
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Re: Reusing a flat-tappet cam? Wiped lobe risk?
[Re: Iowan]
#2525119
07/21/18 10:40 PM
07/21/18 10:40 PM
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Joined: Feb 2005
Posts: 20,144
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,144
PA.
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I tell you what Jim Doyle owner of Racer Brown Cams told me. If the cam hasn’t been used several hard years, same lifters in order, and the same block your odds increase. Well used cam like me mine was, new lifters like mine were, and a different block like mine was, odds are not in your favor at all. I rolled the dice and 3 lobes were gone in one pass. We talked on the subject later and he went on to say a well used cam is worn through the cams hardness and new lift r are wearing a new pattern. H also said factory locksifter angles are different from one factory block to another. Not must but some. I will never put a used solid lifter cam in a different block
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Reusing a flat-tappet cam? Wiped lobe risk?
[Re: pittsburghracer]
#2525139
07/21/18 11:54 PM
07/21/18 11:54 PM
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Joined: May 2005
Posts: 803
Oklahoma
Mopar72Man
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 803
Oklahoma
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I tell you what Jim Doyle owner of Racer Brown Cams told me. If the cam hasn’t been used several hard years, same lifters in order, and the same block your odds increase. Well used cam like me mine was, new lifters like mine were, and a different block like mine was, odds are not in your favor at all. I rolled the dice and 3 lobes were gone in one pass. We talked on the subject later and he went on to say a well used cam is worn through the cams hardness and new lift r are wearing a new pattern. H also said factory locksifter angles are different from one factory block to another. Not must but some. I will never put a used solid lifter cam in a different block That is somewhat my worry, the cam had 15,000 or so hard street miles on it. I do not have any old lifters and it's going into a different engine, hydraulic cam. I may roll the dice, the engine it's going in is of unknown age and is currently bone stock in a truck that doesn't get driven much. I'd like to bring some life to it, but if something came apart, it could realistically use a rebuild anyway.
72 Challenger - will be sublime, little 340 904, 8 3/4" - Under Construction 
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Re: Reusing a flat-tappet cam? Wiped lobe risk?
[Re: Mopar72Man]
#2525315
07/22/18 01:15 PM
07/22/18 01:15 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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cam size is a big factor. Stock 318 cam, no issues.
Something you need to consult with Jim Doyle owner of Racer Brown Cams about, probably not a good idea.
Of course the easy cam is cheapest and the most likely to fail cam is more expensive. Which is counterproductive to the issue at hand.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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