Aftermarket flat-tappet cams and no-zinc option?
+7
brownbomber77
BBMALIBU
ant7377
REVINKEVIN / Mr. 600+HP
73ss
fishhead
michiganlarry
11 posters
G3GM :: G3 Tech :: Performance
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Re: Aftermarket flat-tappet cams and no-zinc option?
That's a great read for anyone installing a flat tappet set.
The one part I always stress for break-in, is ::DON'T LET IT IDLE !! Idling, for even a short term, beats the hell out of the lobes & lifters...
The one part I always stress for break-in, is ::DON'T LET IT IDLE !! Idling, for even a short term, beats the hell out of the lobes & lifters...
pila- Donating Member
- Street Cred : 43
Re: Aftermarket flat-tappet cams and no-zinc option?
I found it interesting the recommendation to fill the oil pan to within an inch of the engine block to aid in more splashing and oil vapors getting to the cam.
Never heard of that before. Interesting.
Never heard of that before. Interesting.
Joe73- Donating Member
- Street Cred : 83
Re: Aftermarket flat-tappet cams and no-zinc option?
ant7377 wrote:Its not the added expense of the roller cam but the damage when one of the rollers lets go that scares me but maybe im being over cautious.
I believe the GM LS motors are equipped with roller lifters. Durability shouldn't be a problem.
BBMALIBU- G3GM Member
- Street Cred : 2
Re: Aftermarket flat-tappet cams and no-zinc option?
Since about '87 or '88, GM engines have had rollers. Must have been something about gas mileage (?) And of course the changes in oil, to satisfy emissions concerns about anti-wear additives like ZDDP etc..
pila- Donating Member
- Street Cred : 43
Re: Aftermarket flat-tappet cams and no-zinc option?
My brother has an aftermarket cam in his 350 Olds and I noticed it getting wiped out a couple years ago. The lobes were starting to show signs of scuffing to the point I suggested changing the cam. We dumped a bunch of gray stuff from NAPA and are pending results. New oil is junk for flat tappet.
brownbomber77- G3GM Member
- Street Cred : 4
Re: Aftermarket flat-tappet cams and no-zinc option?
Joe73 wrote:I found it interesting the recommendation to fill the oil pan to within an inch of the engine block to aid in more splashing and oil vapors getting to the cam.
Never heard of that before. Interesting.
I wouldn't recommend this. To much oil causes aeration of the oil. Air isn't a good lubricant.
Joe Gibbs makes oil for the older flat tappet engines. Google it.
1cheapshot- G3GM Member
- Street Cred : 0
Re: Aftermarket flat-tappet cams and no-zinc option?
One flat tappet cam wipeout I had was from letting a fresh engine sit for a few months, before running it, even after pre-oiling it before running it....
pila- Donating Member
- Street Cred : 43
Re: Aftermarket flat-tappet cams and no-zinc option?
pila wrote:One flat tappet cam wipeout I had was from letting a fresh engine sit for a few months, before running it, even after pre-oiling it before running it....
I agree. I've read that several times. Thats why I didnt assemble my engine before doing my body work. When I do assemble it I will break it in within a week or two.
Joe73- Donating Member
- Street Cred : 83
Re: Aftermarket flat-tappet cams and no-zinc option?
Every thing I've built over the years had flat tappets, and in these later years I just make sure the cam break-in is done right. That seems to be the way to assure that it lives...
pila- Donating Member
- Street Cred : 43
Re: Aftermarket flat-tappet cams and no-zinc option?
The more mild the cam is with low spring pressures helps too.
bracketchev1221- G3GM Enthusiast
- Street Cred : 15
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G3GM :: G3 Tech :: Performance
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