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#101
08-14-2020, 02:46 PM
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There is a gentleman that had posted in one of the pontiac facebook groups about doing this.
He used the Sealed Power 2148 lifter which apparently matches the lifter bore oil feed correctly. I believe that is an LS7 lifter. He used the ford spider part 31-1000. Per his post the modifications necessary were to cut the slightly reshape the spider to fit the dimension of the lift galley so the forks are properly located. Additionally the block side portion of the forks must be ground slightly to allow them to sit flush against the top of the lifter bore.
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-Jason 1969 Pontiac Firebird |
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#102
08-14-2020, 04:21 PM
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Quote:
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-Jeremy 1968 GTO 4-spd convertible, console, factory gauges, hidden headlights, 3.90:1 posi, AM/FM radio. 1962 Catalina convertible, Starlight black w maroon interior & white top. |
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#103
08-14-2020, 05:51 PM
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It was the Pure Pontiac Powered Outlaws group. The information is in a post related to Johnson Hydraulic Rollers
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-Jason 1969 Pontiac Firebird |
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#104
08-14-2020, 06:41 PM
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Quote:
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 66 GTO, 495, M22, Strange S-60 w/4.10 Sold new at Ace Wilson's Royal Pontiac http://www.youtube.com/watch?v=cUHC-Z8xhtg |
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#105
10-24-2020, 09:40 PM
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Tony just posted the same information again - same group. He has several thousand miles on his build with the LS lifters. No issues. Jim Lehert built the engine, good to know it came from a Pontiac guy.
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#106
12-31-2020, 10:37 AM
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LS lifters in a Pontiac? Hmmmmm
Sorry if it's a repost but I just saw this on YouTube this morning. Pretty interesting.
https://www.youtube.com/watch?v=fAKTh3uWBrE |
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#107
12-31-2020, 11:19 AM
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Saw that too, anyone on here have any first person experience with using LS7 lifters in a Pontiac?
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68 GTO,3860# Stock Original 400/M-20 Muncie,3.55’s 13.86 @ 100 Old combo: 462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's. 1968 Pontiac GTO : 11.114 @ 120.130 MPH New combo: 517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's 636HP/654TQ 1.452 10.603 @ 125.09 http://www.dragtimes.com/Pontiac-GTO...lip-31594.html |
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#108
12-31-2020, 12:19 PM
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Very interesting!
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#109
12-31-2020, 01:05 PM
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Quote:
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#110
12-31-2020, 02:35 PM
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subscribed
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#111
12-31-2020, 04:10 PM
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Thanks, very helpful for me.
The 0.442" lobe on me cam creeps me out.. I probably need to trade roller cams, for a smaller Street Roller. |
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#112
12-31-2020, 06:37 PM
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I had a 28,000 mile C6 Z06 and it ate a LS7 lifter in the first week I owned it. After doing a lot of LS homework, I concluded no GM LS lifters are long term reliable in a performance application. I am sure some use stock truck lifters with in their 1000hp LS builds but you see many with issues as well. I ended up ordering a set of Johnson's from Paul K (Fair price and hand delivery!). The car was quiet when I sold it.
That said, our retrofit lifters have issues as well. Looking at the video @ 2:00 mins, it appears the lower part of the band is lower than the Pontiac lifter. I wonder if that is going to be a problem?
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71 Formula 433, Splayed cap 400 block, 4" stroke Scat forged crank, 6.8 Eagle rods, custom Autotec pistons. SD 295 KRE D ports, Old faithful hybrid roller, Torker II, Holley Sniper Stealth, Tribal Tubes, TKO 600, 3.73 Eaton posi. Last edited by Formula8; 12-31-2020 at 06:52 PM. |
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#113
12-31-2020, 08:12 PM
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LS 7 hydraulic roller lifters
I have seen on another Pontiac site where guys are replacing their comp hydraulic roller lifters with ones from the LS7. There's also a YouTube video crediting Jim Lehart with this modification . Apparently the lifters are more cost effective, lighter than other Pontiac retrofit brands, and made in the USA
Anyone here trying them, and where there any issues? |
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#114
12-31-2020, 08:17 PM
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I think we're going to have 15 new threads about this before tomorrow. Check 3 threads down.
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#115
12-31-2020, 08:25 PM
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Maybe the moderator can delete my thread. Thanks
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#116
12-31-2020, 09:32 PM
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How is Jim doing? We had our political differences but at the end of the day I believe Jim Lehart is a good man. I kind of miss having him around!
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#117
01-02-2021, 10:38 AM
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this is the you tube video
https://youtu.be/fAKTh3uWBrE |
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#118
01-02-2021, 11:42 AM
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The video stated the LS7 lifters were about half the weight. Is that true?
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#119
01-02-2021, 12:00 PM
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im sure they are lighter as they are shorter because of no link bars.Does not sound like its a retro fit deal as the block needs to be ground a little above the lifter bores.Might be a good option for new builds.Again,chevy lifters so there could be oiling hole issues?Tom
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#120
01-02-2021, 12:27 PM
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Credit given to Jim Lehart (CVMS) at start of video. I spoke with him years ago and he mentioned he was working on this but never heard it again till now.
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project |
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