Morel Lifters and LS7 Lifters
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Morel Lifters and LS7 Lifters Hey guys,
Doing a bit of work to my car at the moment and wanted some advice. I have a set of Morel street series 5290 tie bar lifters in the car at the moment. One of them has some mild pitting on the roller. The cam is out and has been taken to a cam specialist to check it and it's all in good condition.
Now, I've been advised to change the lifters to LS7 lifters.
I don't know much about these LS motors, this is the first one I've worked on. My question is this:
Are all LS lifters the same height/profile? If I swap out my Morel Link Bar lifters in favour of LS7 lifters, how do I know that the seat for the pushrod isn't higher or lower on the LS7 lifter than on the Morel Lifter? If it's not the same height, I'll either overextend the pushrod/rocker/valve or the valves won't open as far as they do now, so are the LS lifters all a universal length?
The car engine is running this gear:
6.0L L98 motor
Cam: 242/245 620 Lift
Pushrods: Trend 210 7.350 .080
PAC dual valve springs
Any advice is greatly appreciated!
Doing a bit of work to my car at the moment and wanted some advice. I have a set of Morel street series 5290 tie bar lifters in the car at the moment. One of them has some mild pitting on the roller. The cam is out and has been taken to a cam specialist to check it and it's all in good condition.
Now, I've been advised to change the lifters to LS7 lifters.
I don't know much about these LS motors, this is the first one I've worked on. My question is this:
Are all LS lifters the same height/profile? If I swap out my Morel Link Bar lifters in favour of LS7 lifters, how do I know that the seat for the pushrod isn't higher or lower on the LS7 lifter than on the Morel Lifter? If it's not the same height, I'll either overextend the pushrod/rocker/valve or the valves won't open as far as they do now, so are the LS lifters all a universal length?
The car engine is running this gear:
6.0L L98 motor
Cam: 242/245 620 Lift
Pushrods: Trend 210 7.350 .080
PAC dual valve springs
Any advice is greatly appreciated!
The plunger in the lifter on morel's do not have as much travel as the ls7 lifters so your going to want to measure push Rod length. Also just an FYI the sweet spot on preload on the ls7 lifters seems to be between .075-.080.
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I already know the length of the pushrods. 7.350", I thought with a 620 lift, someone would already know whether the LS7 lifters would work.
Not sure how to adjust preload when nothing seems to be adjustable.
Sorry for the stupid questions, I've never worked on one of these motors before and want it to go back together properly.
How does the LS7 lifter have more travel if the seat height is the same? I read they're both the same seat height.
Thanks for your reply.
Not sure how to adjust preload when nothing seems to be adjustable.
Sorry for the stupid questions, I've never worked on one of these motors before and want it to go back together properly.
How does the LS7 lifter have more travel if the seat height is the same? I read they're both the same seat height.
Thanks for your reply.
I already know the length of the pushrods. 7.350", I thought with a 620 lift, someone would already know whether the LS7 lifters would work. Not sure how to adjust preload when nothing seems to be adjustable. Sorry for the stupid questions, I've never worked on one of these motors before and want it to go back together properly. How does the LS7 lifter have more travel if the seat height is the same? I read they're both the same seat height. Thanks for your reply.
As far as ls7's working with .620 lift they should be fine. I run them on my stroker cam with .630 lift no issue. But! You are going to want to measure the pushrod length with a checker to get your base Rod length without preloading the lifter. Once you do that take the number you get and add .075-.080 and that will give you the right length push Rod you'll need
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Joined: Apr 2014
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No prob. Nothing is adjustable your correct, but preload is set by either getting longer or shorter pushrods. Now as far as seat height goes they may be the same but the seat travels further into the lifter body on the ls7 lifters than on a morel lifter. As far as valve train goes a cookie cutter approach is not a good way to go. What may work right on one setup may not work on others.
As far as ls7's working with .620 lift they should be fine. I run them on my stroker cam with .630 lift no issue. But! You are going to want to measure the pushrod length with a checker to get your base Rod length without preloading the lifter. Once you do that take the number you get and add .075-.080 and that will give you the right length push Rod you'll need
As far as ls7's working with .620 lift they should be fine. I run them on my stroker cam with .630 lift no issue. But! You are going to want to measure the pushrod length with a checker to get your base Rod length without preloading the lifter. Once you do that take the number you get and add .075-.080 and that will give you the right length push Rod you'll need
I am new to this stuff as well and wondering what is a stroker cam?
