LS7 Lifter
#7
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iirc
stock ls2 with 243 heads and "ls2 lifters" run a 7.4 pushrod.
when i had a lifter fail i went to ls7 lifters.
pushrod length for 0 lash was 7.300.
bought a 7.350 comp cam pushrod, added the .050 for preload.
seems as though the lifter cup in the ls7 .050 higher.
you should be using a pushrod length checker though to figure out your 0 lash and add to that for preload.
here is a picture of the 2.
ls7 unit is the one with the shroud around the roller.
stock ls2 with 243 heads and "ls2 lifters" run a 7.4 pushrod.
when i had a lifter fail i went to ls7 lifters.
pushrod length for 0 lash was 7.300.
bought a 7.350 comp cam pushrod, added the .050 for preload.
seems as though the lifter cup in the ls7 .050 higher.
you should be using a pushrod length checker though to figure out your 0 lash and add to that for preload.
here is a picture of the 2.
ls7 unit is the one with the shroud around the roller.
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#8
It's supposed to be a .050 difference in the cup, (cup in the lifter .050 deeper). I'm not sure as compared to the other LSX model lifters, but I know compared to LT1 lifters, they require a .050 longer than stock pushrod.
#9
iirc
stock ls2 with 243 heads and "ls2 lifters" run a 7.4 pushrod.
when i had a lifter fail i went to ls7 lifters.
pushrod length for 0 lash was 7.300.
bought a 7.350 comp cam pushrod, added the .050 for preload.
seems as though the lifter cup in the ls7 .050 higher.
you should be using a pushrod length checker though to figure out your 0 lash and add to that for preload.
stock ls2 with 243 heads and "ls2 lifters" run a 7.4 pushrod.
when i had a lifter fail i went to ls7 lifters.
pushrod length for 0 lash was 7.300.
bought a 7.350 comp cam pushrod, added the .050 for preload.
seems as though the lifter cup in the ls7 .050 higher.
you should be using a pushrod length checker though to figure out your 0 lash and add to that for preload.
I set mine between .060-.100 preload.. .080 is the target from what I've read. I measured with a Pushrod Tool the other day and it turned out I needed a 7.375" one.
#18
[QUOTE=djjonesivs;14779505]iirc
stock ls2 with 243 heads and "ls2 lifters" run a 7.4 pushrod.
when i had a lifter fail i went to ls7 lifters.
pushrod length for 0 lash was 7.300.
bought a 7.350 comp cam pushrod, added the .050 for preload.
seems as though the lifter cup in the ls7 .050 higher.
you should be using a pushrod length checker though to figure out your 0 lash and add to that for preload.
So does it seem that the ls7 lifter is .050 higher, or is it .050 higher???
stock ls2 with 243 heads and "ls2 lifters" run a 7.4 pushrod.
when i had a lifter fail i went to ls7 lifters.
pushrod length for 0 lash was 7.300.
bought a 7.350 comp cam pushrod, added the .050 for preload.
seems as though the lifter cup in the ls7 .050 higher.
you should be using a pushrod length checker though to figure out your 0 lash and add to that for preload.
So does it seem that the ls7 lifter is .050 higher, or is it .050 higher???
#19
Bumping this one up..I was asked this earlier and found some good info to clear it up.
LS7 on the LEFT, stock on the RIGHT
http://www.camaroz28.com/forums/showthread.php?t=690137
Here is another one..
https://ls1tech.com/forums/15011466-post7.html
So gentlemen what we conclude here is the actual LS7 Lifter is .050" TALLER than the stock Lifter, and requires a .050" SHORTER PUSHROD.
However to throw a curve ball in here..there are stock replacement lifters that are out there that look like LS7 Lifters, but the Cup is stock height. You just have to pay attention to detail when you look.
LS7 on the LEFT, stock on the RIGHT
http://www.camaroz28.com/forums/showthread.php?t=690137
Here is another one..
https://ls1tech.com/forums/15011466-post7.html
So gentlemen what we conclude here is the actual LS7 Lifter is .050" TALLER than the stock Lifter, and requires a .050" SHORTER PUSHROD.
However to throw a curve ball in here..there are stock replacement lifters that are out there that look like LS7 Lifters, but the Cup is stock height. You just have to pay attention to detail when you look.