@$%^ gm race lifters.....
04-05-2011, 10:30 PM
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@$%^ gm race lifters..... ok so on my iron 408 i had a lifter take a crap... didnt drive it to long once i figured out it happened.. pulled it all apart and had to replace the cam lifters 1 valve and a valve guide... NOW... i was about to install the new cam and lifters.. and i looked down into the lifter bore..... it looks like the roller was wedged unto the side of the lifter bore.... now i put a used lifter in the bore and it moves freely no catching what so ever.. but i dont know if i can run it like this or not... i was looking at the pics of the ls6 lifter vs the latter fully encased lifter.. and by the looks of it.. if put the lifter in the bore.. the ls6 lifter looks as if it has enough area on the base circle to be fully encased in a machined surface... but the ls7 lifter "wouldnt" if u will.... what should i do pull the motor and have it machined or clean it up and run it? kinda looks like if i have to i will pull it... but kinda looks like how u would clearance a cylinder wall for a stroker haha
04-06-2011, 03:33 PM
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Not sure exactly what you're saying there. Could you explain it differently or show some more pics? It sounds like you're saying that the ruined lifter broke away part of the bore and the LS7 lifter isn't being supported properly. Is that correct?
04-06-2011, 03:53 PM
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lifter bores can be repaired by a machine shop if it is jacked up. Involves being bored out, a bushing installed, and going again. Usually done to correct lifter bore angles and whatnot, but I can't quite tell from the pics.
04-06-2011, 07:02 PM
#7
Yes a competant machine shop could machine and brass sleeve that 1 lifter
bore but there wouldn't be much iron casting to support it. I wonder about
a cast iron weld/remachine job or else put a larger base circle cam in it to
raise the lifter body as you were describing and then run 1.8 rockers to
recover some of the lost lobe lift ?????? just a thought
bore but there wouldn't be much iron casting to support it. I wonder about
a cast iron weld/remachine job or else put a larger base circle cam in it to
raise the lifter body as you were describing and then run 1.8 rockers to
recover some of the lost lobe lift ?????? just a thought
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04-06-2011, 07:17 PM
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Yes a competant machine shop could machine and brass sleeve that 1 lifter
bore but there wouldn't be much iron casting to support it. I wonder about
a cast iron weld/remachine job or else put a larger base circle cam in it to
raise the lifter body as you were describing and then run 1.8 rockers to
recover some of the lost lobe lift ?????? just a thought
bore but there wouldn't be much iron casting to support it. I wonder about
a cast iron weld/remachine job or else put a larger base circle cam in it to
raise the lifter body as you were describing and then run 1.8 rockers to
recover some of the lost lobe lift ?????? just a thought
even so.. if u compair a ls6 lifter to an ls7.. u see the 7 is completely encased.. and the ls6 isnt.. so either way it wouldnt be supported by the bore anyways... catch my drift?...so an ls6 cam has a smaller base circle anyways..... so if i put in an ls6 lifter.. i wonder what it would look like in the bore.......
anyways.. looked at it with a bore scope.. and it SMASHED that portion into the block or... broke it and then smashed the roller in there and smoothed it out.. haha..
i am not looking forward to this..... i really regret buying these damn lifters.. biggest pain in my *** now..think i can clean up the edges and what is left will be enough surface area to support the lifter properly?
04-07-2011, 11:02 PM
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the more and more i look at it.. i think i am gonna pull the block .. have it welded and then a bushing installed....man i am just afraid i am gonna hear bad news from the machine shop after i get it back.... with the lifter in the bore and it seated ont he base circle of the cam there is probably only 1/8-1/4 in touching the machined surface of the lifter bore just in that one recessed part... i am just scared about turning 7300 rpm with the bore like this..
04-08-2011, 07:58 AM
#16
If you are turning 7300 rpm I wouldn't be using lifter trays anyway. Get a set of the Morel's 5206 linkbars and call it a day. I have heard of too many problems with lifter trays cracking and lifters turning causing alot of carnage. I just bought a set so I wouldn't have to deal with the lifter trays. I bought the 72534 Lunati's though
04-08-2011, 09:51 AM
#17
If you are turning 7300 rpm I wouldn't be using lifter trays anyway. Get a set of the Morel's 5206 linkbars and call it a day. I have heard of too many problems with lifter trays cracking and lifters turning causing alot of carnage. I just bought a set so I wouldn't have to deal with the lifter trays. I bought the 72534 Lunati's though
For my motor in my sig i am using Lunati's solid roller linkbar.
You can pick up a set of Lunati's Hyd. Linkbars for around 330$ i believe at TSP.
