LS7 Lifter
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
LS7 Lifter I searched this and came up with about 10 different answers.
What is the difference..if any..with the LS7 Lifter vs the stock regular GM Lifters with the Lifter Cup depth.
Thanks.
What is the difference..if any..with the LS7 Lifter vs the stock regular GM Lifters with the Lifter Cup depth.
Thanks.
I know for a fact that the ls7 lifter has replaced the OEM part # for stock ls1 lifter if that means anything to you. otherwise, you might have to find someone with both for anything more in depth.
Hey Merv,
for what its worth... Geoff from EPS told me to run 7.400 push rods if I run LS7 lifters and 1.425 if I run stock lifters....
So I assume there must be some difference....
Matt
for what its worth... Geoff from EPS told me to run 7.400 push rods if I run LS7 lifters and 1.425 if I run stock lifters....
So I assume there must be some difference....
Matt
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
I know there is a difference..if I had my Heads still off I would pull one of my LS7's and take a stock one and measure them both to end the questioning..lol..
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.
Trending Topics
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.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
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.
For what it's worth, in the winter of 2009 I did my trickflow heads and vrx5 cam. When I pulled them out I had the new style on the intake and the old style on the exhaust side. My car was stock and came from GM that way. My car is a 2001.
Staging Lane
Joined: Jun 2010
Posts: 75
Likes: 1
[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???
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
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.