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LS to AMC rocker conversion |
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BBO UK
AMC Nut Joined: Feb/17/2020 Location: UK Status: Offline Points: 288 |
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Posted: Jan/23/2024 at 11:05am |
Individual stud AMC HS Roller Rockers, would be an easier replacement, but cost more than the LS rockers. The shaft system is good but expensive, but its nice to have it available for those that can use it. When John started this thread 10 years ago the choise was more limited and we were gratefull that he took the time to figure out how to use something cheap and high performance for our engines.
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5926 |
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Was thinking individual stud AMC HS Roller Rockers.
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Kreep
AMC Apprentice Joined: Jun/03/2019 Location: Illinois Status: Offline Points: 178 |
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Maybe. A set of Summit Racing house rockers with upgraded trunions is $260. Add $25 for stands. So yes, $285 is less than $625 for the Harland Sharp rockers. But in my opinion it only makes sense if you are replacing the valves with something 0.1 to 0.2" taller to correct the geometry. There are other advantages. The LS rocker arms are lighter over the valve, have a 1.7:1 ratio, and the slipper shoe is more reliable than a roller tip. |
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1982 Jeep CJ-7
http://theamcforum.com/forum/basically-stock-cj7_topic106501.html https://irate4x4.com/threads/basically-stock-cj-7-update.383765/ |
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BBO UK
AMC Nut Joined: Feb/17/2020 Location: UK Status: Offline Points: 288 |
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Harland sharp now offer shaft rockers for both bridged and studed AMC heads, talk to Mike Luke ( POS#1 ) not as cheap as this Chevy LS fix, but purpose built for our heads.
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mbwicz
Supporter of TheAMCForum Joined: Feb/20/2019 Location: Buffalo, NY Status: Offline Points: 2001 |
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I think when this thread was started there weren't commonly available roller rockers for bridge rocker AMC heads. The last couple of years Harland Sharp (and maybe others) have come out with rockers that are compatible. Your point is valid, though. Mike |
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1970 AMX, one step forward, one step back. Both steps cost time and money.
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Have2SC's
AMC Addicted Joined: Nov/30/2011 Location: Norwalk, OH Status: Offline Points: 1257 |
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1971 SC360 Hornet 4 speed 1970 Javelin 390 4 speed "Base Model" 1967 Rambler 220 X code 343 4 speed
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Kreep
AMC Apprentice Joined: Jun/03/2019 Location: Illinois Status: Offline Points: 178 |
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LS3 has one offset rocker. LS1, LS2 and LS6 are the right ones for this swap. But these rockers are 1.7:1 so that's the wrong direction to tame your cam.
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1982 Jeep CJ-7
http://theamcforum.com/forum/basically-stock-cj7_topic106501.html https://irate4x4.com/threads/basically-stock-cj-7-update.383765/ |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5926 |
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Is it really cheaper than just buying Harland Sharp AMC Roller Rockers?
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nitro-express
AMC Apprentice Joined: Jan/20/2024 Location: Manitoba Canada Status: Offline Points: 74 |
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I am in the process of cobbling together a 304 or perhaps a 401. I have head issues, and the LS rocker arm swap sounds interesting.
I am having a bit of a search issue, I could only find one reference to the spacing between valves on a stock AMC V8 head and it lists the space to be 1.950 CL of intake valve to CL of exhaust valve. This is probably the same as the rocker stud spacing. On an LS I found the 2.115" spacing listed for an LS3. I have a set of Ford 351W heads and the rockers are good on it, I may use those, but the LS idea does appeal to me as well. I was also searching for a 1:5 ratio rocker to tame down a fairly wild cam I have. n-e
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Kreep
AMC Apprentice Joined: Jun/03/2019 Location: Illinois Status: Offline Points: 178 |
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I stand corrected. Which aftermarket rockers are you using?
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1982 Jeep CJ-7
http://theamcforum.com/forum/basically-stock-cj7_topic106501.html https://irate4x4.com/threads/basically-stock-cj-7-update.383765/ |
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