Thoughts on LS7 lifters?
Thoughts on LS7 lifters? Ive had some concerns about my stock 100k+ mileage lt1 lifters collapsing under higher rpms and not getting oil through them so I went ahead and bought myself some LS7 lifters from Brian Tooley Racing. Just would like to know everyones thoughts on these? I hear its a pretty common choice for newer builds like 383's etc.
I run the ls7 lifters in my 355. I shift at 6800 rpms. It’s not a daily driver by any means now days though but they are holding up just fine to beating on it on the weekends and racing at the track.
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Joined: Nov 2011
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From: Tucker, GA
Despite loads of people saying they're the same as LT1 lifters - they are not. Different cup depth is the most notable thing, and easily seen with the naked eye, right behind the (also different) retaining clip. As for the innards, I've not taken them apart to see if the guts are different - but may do so eventually. Also, contrary to posts stating otherwise, GM is still making (and selling) LT1 specific lifters because - surprise - they're different from LS lifters. The LS lifters will fit just fine, but so will a properly machined tree branch. Doesn't mean its the correct part. I ran the Skip White LS lifters and couldn't get them quiet enough. Ran a set of Crower lifters and the rollers delaminated and wiped out the cam. Now I am running GMPP LT1 lifters and have zero problems.
As with anything else on here - ymmv.
As with anything else on here - ymmv.
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Dan
Are the GMPP lifters made by Mellig? (JB2079)
or part#?
FWIW I have had Comp 850's in my 383 now for 40+k mi and so far all good. IDK if Comp makes their lifters
https://www.jegs.com/i/COMP-Cams/249...791+4294829174
LSx lifters, no direct experience. Have read several "problem" issues and also "good"....so I defer to those comments from their source as I have no experience with them.
Are the GMPP lifters made by Mellig? (JB2079)
or part#?
FWIW I have had Comp 850's in my 383 now for 40+k mi and so far all good. IDK if Comp makes their lifters
https://www.jegs.com/i/COMP-Cams/249...791+4294829174
LSx lifters, no direct experience. Have read several "problem" issues and also "good"....so I defer to those comments from their source as I have no experience with them.
Last edited by BALLSS; Aug 24, 2018 at 06:09 PM.
Despite loads of people saying they're the same as LT1 lifters - they are not. Different cup depth is the most notable thing, and easily seen with the naked eye, right behind the (also different) retaining clip. As for the innards, I've not taken them apart to see if the guts are different - but may do so eventually. Also, contrary to posts stating otherwise, GM is still making (and selling) LT1 specific lifters because - surprise - they're different from LS lifters. The LS lifters will fit just fine, but so will a properly machined tree branch. Doesn't mean its the correct part. I ran the Skip White LS lifters and couldn't get them quiet enough. Ran a set of Crower lifters and the rollers delaminated and wiped out the cam. Now I am running GMPP LT1 lifters and have zero problems.
As with anything else on here - ymmv.
As with anything else on here - ymmv.
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Joined: Nov 2011
Posts: 471
Likes: 14
From: Tucker, GA
"The
Like I said - your mileage may vary.
Edit: Also, GM began installing LS6 clutches on LS1's in 2001.