the_merv

iTrader: (88)

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.

LS1aiden

there good till 7k rpm! i recommend them if your just going to buy stock lifters.

the_merv

iTrader: (88)

I already got them..trying to figure out the measurement difference for Pushrod geometry.

Fb0dy0nly

iTrader: (10)

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.

MattSapp95_T/A

iTrader: (35)

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

the_merv

iTrader: (88)

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..

djjonesivs

iTrader: (2)

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.

93Z2871805

iTrader: (5)

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.

the_merv

iTrader: (88)

Good pics.
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.

bene

iTrader: (16)

Tha'ts funny. I have his cam and he sent me 7.425" PRs with my ls7 lifters.

MattSapp95_T/A

iTrader: (35)

Ha yea that is weird... Maybe your cam is on a different base circle??... I even called him about it after I received them and he said 7.4 with LS7 and 7.425 with stock.... IDK?

the_merv

iTrader: (88)

You two have different Heads..

djjonesivs

iTrader: (2)

Measure measure
No one ca determine your engine height tolerances.

bluethunder364

iTrader: (5)

Can someone post a part # for the LS7 lifter?? Thanks

the_merv

iTrader: (88)

12499225

litle88

iTrader: (20)

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.

MattSapp95_T/A

iTrader: (35)

LOL over looked that!

Zbinkley

[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???

the_merv

iTrader: (88)

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.

litle88

iTrader: (20)

Wow nice!