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#1
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Comp 857 Hydraulic Roller Lifters
Here are a set of 857's that my father ran in his last 455 for about 4 years. These lifters were purchased back around 2000.
These lifters were used with a custom hydraulic roller that Kauffman spec'd for the engine with 254/262 @ .050 with .571 lift (1.5 rocker) on a 110 LSA. Dad ran this cam and these lifters with a 1.65 rocker. These lifters never once ticked or tapped or made any kind of sewing machine noises that so many complained about throughout the time frame they were used. What I'm curious about is how these compare to todays 857's as far as oil band and/or oil feed hole locations. I'm told todays 857's have been changed/updated and are the correct lifters now. These that I have pictured are obviously much older than the recent updates, yet they worked fine when in service. Is there a difference I'm not seeing? I can't find a good picture of a recent 857 to compare with. Last edited by Formulajones; 01-28-2019 at 04:56 PM. |
#2
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PM sent
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#3
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http://forums.maxperformanceinc.com/...=791233&page=8 Pic is on post 143 of this thread.
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#4
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Thanks,was looking for it!Tom
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#5
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Sounds to me like those old style lifters worked pretty darn good.
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#6
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John,I still have one set of the old ones in one of my engines,no issue.The early ones were a crap shoot as there were QC issues,the reason they switched.When Comp is out of the Shavers they sub Morels.The Morels look like the old ones.Tom
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#7
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Tom I've got a set of the new ones for my engine per your recommendation it is just good to see someone come on here and say something works. Too many times on forums, any forum, all you see is bashing.
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#8
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Okay so what I have pictured is an old set that supposedly everyone was having issues with because the oil band is in the wrong location.
If that's the case, then why did these work perfectly fine in dad's engine??? |
#9
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The oil band was not the issue!The clearance of the internals were a issue.The supplier to Comp had QC issues.Lots worked fine,other not so much.I think that the Shaver pontiac hyd roller lifter is still the only one with the band in the right place.Our hobby has been using SBC lifters of ALL types like forever with few issue.Base circle of cams seem to have been the culpritTom
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#10
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That's why I posted the cam specs these lifters were used on. Ever since I've joined this site there has been talk that the oil bands are not correct and aggressive camshafts were also part of the issue because the base circles were so much lower.
It's also why people like Paul Carter are modifying blocks, lowering the oil holes in the lifter bores which cures the issue. In that picture you can also clearly see the revised 857 is much taller, and the oil bands are quite different. Thanks for the picture, that's what I really wanted to see. So which is it? Is it really the oil bands or just an internal lifter clearance issue? There seems to be contradicting theories. I'm not trying to argue, I'm just trying to wrap my head around this, because like I mentioned, these lifters worked perfectly for years. I'm trying to determine if these are something we might want to use in the future, or just go straight for the updated set. In case anyone is wondering, there were no modifications to the lifter bores of the 455 these were used in. I assembled that engine long before I ever heard of such a thing or was even a member of this forum. |
#11
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I too am curious about what the best roller lifter is. Paul is ordering me a cam from Lunati and told me to use Hylift Johnson lifters but when I called them the tech could not verify that the oil band was in the proper place and that they may indeed be Chevrolet lifters. I just want whatever brand I use to be quiet
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
#12
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I can't believe this can of worms is open again.Tom
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#13
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X 2 (insert rolling eyes Imoji here)
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#14
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I posted a picture of what people here say are problematic lifters. We didn't have a problem with them. Yet now we have "updated" lifters on the market that are clearly different in appearance, and that supposedly cures the problem that no one can agree on?? Then why do they appear so different?
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#15
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I am not an engine guru. I don’t have the tools or the know how to measure oil bands etc and compare it to block specs. I just know that of course you can get a bad part in anything but if I spent 600 bucks on a set of lifters and then got everything buttoned up and installed and 3 ticked for no reason other than being Chevrolet bodied I would be pissed
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
#16
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Never mind, I got to the bottom of it enough to be satisfied.
Thanks guys. |
#17
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Quote:
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded) '69 LeMans Vert, 350, #47 heads: Non-running project |
#18
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I just put eheads on a 455 79 ta been running 10 yrs since we built with hyd roller cam and comp 857 lifters was quiet. Checked lifters and they have Chevy oil band they are still quiet
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2008KRE Q16 Winner 2014 atco raceway doorslammer winner 86 grand am tube car 8.95 @152 455 eheads solid flat tappet cam Hoffman Racing building and racing Pontiacs for 35 years |
#19
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Quote:
) However there definitely have been and are quality control issues with almost all engine parts nowadays that have concerns and problems that need to be dealt with. Last edited by PAUL K; 11-04-2018 at 11:14 AM. |
#20
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Quote:
I think it boils down to lifter bore clearance. The engines I have had noise issues with had less than .002" clearance. I feel engines with more than .002" clearance have sufficient clearance to get enough oil past to satisfy the lifter. The tight ones don't. Recommended lifter bore clearance is .0015"-.0018". Many I measure have .0025" or more, depending on lifter size, which I have seen all over the board with lifters.
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Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
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