Why LS7 lifters?
#1
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Why LS7 lifters?
Why should I upgrade to LS7 lifters in my car? Just ordered cam, springs, pushrods, timing chain and under drive pulleys. Havent't ordered headers yet, trying to decide which brand to get.
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It's not an upgrade over your stock lifters. The only advantage they have over buying standard lifters from GM is that they are packaged as a set of 16 for A LOT less money than buying singles.
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#4
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They are the same, for all practical purposes, as your stock lifters. These engines are starting to get higher mileage on average, so people are replacing lifters more frequently now.
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#10
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LS7's are the new LS1 lifter. Only difference it bowl size so you may need a touch shorter pushrods, but you need to check. Just wondering are you doing just a cam install? If so, why replace lifters if you don't have to pull the heads..
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No, I'm not doing a cam install. I'm trying to track down a nasty noise, and I seem to have it narrowed down to lifters. I didn't mean to hijack the thread, but I figured I jump into an existing discussion rather than start a new one just to clarify one thing.
I'm keeping everything stock, so I was just trying to confirm that I was on the right track. Sounds like the LS7 lifters are the stock replacement, but I may need pushrods (depending) and I'd like to replace the guides as well.
But would I order LS1 guides or LS7 guides?
Thanks all.
I'm keeping everything stock, so I was just trying to confirm that I was on the right track. Sounds like the LS7 lifters are the stock replacement, but I may need pushrods (depending) and I'd like to replace the guides as well.
But would I order LS1 guides or LS7 guides?
Thanks all.
#13
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I'd replace the stock trays with LS2 trays while you're there. The new style trays feel noticeably stronger/stiffer, and are cheap insurance against lifters turning!
http://www.texas-speed.com/p-222-gm-...ter-trays.aspx
http://www.texas-speed.com/p-222-gm-...ter-trays.aspx
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#15
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The overall height on a ls7 lifter from the roller to the bottom of the cup is the same height as an ls1 height. When you put them side by side they appear to be a different height because of the cups and the bodies of each lifter but this has already been a busted myth....they are the same overall height and use the same lifter length for a stock setup.
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I thought the reverse was true: they appear identical length when placed side-by-side, but in reality the cup position is different. So in effect they appear same length, but behave as if different in length.
But this is why I like to ask. Just because something is said often doesn't make it true.
But this is why I like to ask. Just because something is said often doesn't make it true.
Last edited by DerrenC; 08-12-2011 at 06:47 AM. Reason: Spelling
#18
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The overall height on a ls7 lifter from the roller to the bottom of the cup is the same height as an ls1 height. When you put them side by side they appear to be a different height because of the cups and the bodies of each lifter but this has already been a busted myth....they are the same overall height and use the same lifter length for a stock setup.
I thought the reverse was true: they appear identical length when placed side-by-side, but in reality the cup position is different. So in effect they appear same length, but behave is if different in length.
But this is why I like to ask. Just because something is said often doesn't make it true.
But this is why I like to ask. Just because something is said often doesn't make it true.
https://ls1tech.com/forums/generatio...1-lifters.html
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And these are the threads that I recently read through that led me to believe there is a slight difference between LS1 and LS7 lifters:
https://ls1tech.com/forums/generatio...er-length.html
https://ls1tech.com/forums/generatio...-question.html
But the one question that remains unanswered for me is: Even if the difference is small, it could obviously affect the proper functioning of the motor--Why would GM offer this as a direct replacement without comment or mention of the need to check the preload?
https://ls1tech.com/forums/generatio...er-length.html
https://ls1tech.com/forums/generatio...-question.html
But the one question that remains unanswered for me is: Even if the difference is small, it could obviously affect the proper functioning of the motor--Why would GM offer this as a direct replacement without comment or mention of the need to check the preload?