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Mandatory oil system mods |
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6881 |
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Someone at AMO was making AMC decals on there home printer to make stick on sleeves for their oil filters.
Nice touch!
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6881 |
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I don't see this one in the thread, and have forgotten about it until I was at one today.
AMC V8's used several different oil pan pick ups. The one on the left is good as it is 0.050" heavier tube, better concave internal screen, no hole on top, but the extension if not removed actually goes into the block oil passage and cuts off 1/8" or more of the pickup passage.
This is 1970 and 1971 as far as I can determine. The round piece you see is 1/4" brass rod that I have brazed to the bottom and removed the nylon button. |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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Not intentionally double posting... but thought it belonged or should be in both places / threads... in their Troubleshooting Techniques area... "Modifying AMC oiling for performance" hmm.., any of you all seen this already ? |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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Thought I would add this. These are NOT my pictures or my modification, and I fail to remember where I saved these from, so I am unable to give credit where credit is do, or otherwise. No endorsement, just something I have saved from somewhere from who knows how long ago about making a Modification to the AMC V8 Oil Pump Pressure Relief Bypass Plunger Circuit Vent...
edit - Forum Member Red Devil authored the below Pictures and Oil Pressure Relief Vent Modification. Edited by PHAT69AMX - Aug/12/2019 at 6:14pm |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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Relevant historical info about the AMC V8 and OILING or the Oil System performance
from the 1969 Car Craft Magazine 4-part Article 'AM Si, Junkee No!' about where Car Craft and Vic Edelbrock built their own 'clone' 1969 Hurst Super Stock AMX 390 car, motor and all.
"One other problem we had noticed was a lack of oil to the rocker arms. An examination of the solid lifters showed a flutter valve underneath the lifter button that meters oil through a small .050 hole. From here the oil travels through an .080 hole in the button to the tubular pushrods, and feeds the rocker arms. We removed the flutter valve from the lifter, hoping this would allow additional oil to the topside, only to find out that this wasn't the hot set up either." "caption 3 - Oiling problems with the lifters was one of the puzzles that Vic Edelbrock ( left ) and Bobby Meeks had to solve during testing." "With everything set back together, the engine was re-fired, and during the next few minutes Vic, Bobby, Murray, and myself kept watchful eyes on the many dyno gauges, especially the one measuring oil pressure. With all systems green, Vic preset the Heenan & Froode dyno at 4000 rpm, and pulled the throttle wide open. The power started to come on strong when suddenly the oil pressure took another nose dive. Vic cut the throttle, and we all looked at each other totally dismayed. A thorough checkout showed everything in working order, so we tried another power run. Same results. After five or six seconds of full power the oil pressure would go away. As soon as the power was shut down the second time, I pulled the dipstick to check the oil supply. My suspicions were confirmed, as the stick was bone dry. ( ! An 8-Quart Aviaid Oil Pan ! ) Our lifter modification was working too well. We were pumping oil topside faster than what it could drain back into the pan. After a few seconds at full power, the sump would drain itself to the point where the pick up would suck air, and whammy - no oil pressure. Oh well, back to the drawing boards ! This time we tried a happy medium ( median ) to determine the amount of oil needed topside. The flutter valve was replaced in the lifters, but the .050 metering hole was enlarged to .063 which solved the problem." |
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