Other ways to break in a cam ? 🤪
#2906994
04/05/21 08:01 PM
04/05/21 08:01 PM
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Joined: Aug 2003
Posts: 777 Washougal,Wa
Dodge
OP
super stock
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OP
super stock
Joined: Aug 2003
Posts: 777
Washougal,Wa
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Are there other ways to break in a cam other than firing up a new engine? I was think about using an old empty block with heads. Not sure what id use to rotate the cam and oil system. Any ideas?
Stand behind your word
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Re: Other ways to break in a cam ? 🤪
[Re: Neil]
#2907010
04/05/21 08:51 PM
04/05/21 08:51 PM
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Joined: Feb 2014
Posts: 234 Brisvegas, Australia
Alchemi
enthusiast
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enthusiast
Joined: Feb 2014
Posts: 234
Brisvegas, Australia
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Am I missing how they are checking to see if the lifters are actually rotating before they run it for a full 30 mins like that?
Last edited by Alchemi; 04/05/21 08:52 PM.
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Re: Other ways to break in a cam ? 🤪
[Re: Dodge]
#2907269
04/06/21 12:36 PM
04/06/21 12:36 PM
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Joined: Aug 2003
Posts: 43,303 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,303
Bend,OR USA
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I had one 340 motor years ago that would eat the #5 exhaust lifter after 20,000 It did that twice before we figured out that the block lifter bore was NOT machined correctly That customer and friend ended selling the car after the second failure with out fixing the block My message is to always break the cam in the block your going to use it in and be very careful about reusing a cam and lifters in another block I don't have a accurate number on the total motors I've rebuilt and blue printed but well over 200,I have had three or four of those blocks machine for and fitted with lifter bushings
Last edited by Cab_Burge; 04/06/21 12:40 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Other ways to break in a cam ? 🤪
[Re: Cab_Burge]
#2907326
04/06/21 02:24 PM
04/06/21 02:24 PM
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Joined: Aug 2003
Posts: 777 Washougal,Wa
Dodge
OP
super stock
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OP
super stock
Joined: Aug 2003
Posts: 777
Washougal,Wa
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Hey Cab, it'd be nice not to have to run the car for 1/2 an hour in my neighborhood. Plus change springs. My 70 chargers kinda loud. The last cam break in was my GTX. Its pretty quiet. Split in 3, 10min run times.
Stand behind your word
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Re: Other ways to break in a cam ? 🤪
[Re: hemienvy]
#2907466
04/06/21 09:01 PM
04/06/21 09:01 PM
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Joined: Jan 2003
Posts: 5,791 Hamilton, Ontario Canada
Magnum
master
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master
Joined: Jan 2003
Posts: 5,791
Hamilton, Ontario Canada
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Seems similar to a new and improved set of ignition points. If I was to invest in anything, it would be a roller lifter.
69 Super Bee, 93 Mustang LX, 04 Allure Super
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Re: Other ways to break in a cam ? 🤪
[Re: hemienvy]
#2907481
04/06/21 09:27 PM
04/06/21 09:27 PM
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Joined: Aug 2003
Posts: 43,303 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,303
Bend,OR USA
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If you rotate the fresh motor by hand, or whatever, to check lifter rotation, didn't you just wipe off all the cam lube for when the motor fires ? Not that I have seen so far You need to remember that the flat tappet lifters are design to spin on their edges of the cam lobes on the tapered lobe face to prevent them going flat from rubbing all the way across the lobes
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Other ways to break in a cam ? 🤪
[Re: Dodge]
#2907573
04/07/21 06:33 AM
04/07/21 06:33 AM
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Joined: Jul 2003
Posts: 4,793 Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,793
Holland MI Ottawa
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Im recently out of the mopar musclecar hobby. But my 360 build was gonna use a hyd roller cam/conversion. This is a SIGNIFICANTLY more $$$ option but many legit guys on this forum and in the hobby with all brands and makes have abandoned hyd flat tappet cams due to the modern version of them not having the quality of the past. I remember around 1999 here on moparts the new hyd flat tappet cam destroyed posts starting to appear. Back then it was blamed on the reduced zinc in our favorite brands of oil. But as time went on things like lack of lifter crown, soft metal -basically poor quality has been established.
Keep old mopars alive.
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