ShadowsPapa
Well-Known Member
- First Name
- Bill
- Joined
- Oct 12, 2019
- Threads
- 247
- Messages
- 40,462
- Reaction score
- 53,906
- Location
- Runnells, Iowa
- Vehicle(s)
- '25 JTMX, '23 JLU 4xe, '82 SX4, '73 Javelin
- Occupation
- Retired auto mechanic, frmr gov't ntwrk security admin
- Vehicle Showcase
- 3
The problem was oil starvation due to inadequate oil return to the pan. The bit about needing the line was started by an early engine builder who wrote a book back in the early 70s and it grew from there. There's a whole lot of people who run fast AMCs without that oil line - but with a better oil pan, fixing the oil return issues and so on. Me - I ran an extra quart.So the supposed issue of the rear valley needing extra oil was junk? The one where people were drilling holes and making an oil line that ran in the valley and added oil to rear???
I did pull my oil pump apart and honed the plate and sides of gears, etc. That added something like 5psi at idle. Seems like maybe I did something to the pressure relief valve also.
I'd dug into the AMC stuff when I first got my CJ5 and converted the AMC 360 over to FI and HEI big cap dizzy. After that I didn't pay as much attention anymore.
I read in an old magazine, Hot Rod or Motor Trend or something similar, an interview with an original AMC engine designer. He claimed that they looked at the other V8s out at the time and figured what work and what didn't work on those. Then when they designed the AMC V8, they used that info to help shape their design. Didn't copy any one thing, just used the info as a valuable tool so to speak.
My 79 CJ5 had, I believe a 72 AMC360. Too long ago to remember for sure, I know it had the dog leg heads. Anyways, it had ford ignition system when I got it. Can't remember if it had ford stampings or if it was just the same stuff ford used. Could of been another manufacturers parts, just the same manufacturer that ford used. Again too long go and I yanked it out, probably in the first or second year of ownership.
All this was half a life ago.
I could run extended high RPM runs and then come to a stop and watch the oil light come on.
There were some tricks to reducing oil to the rocker arms, and helping it flow back to the pan from under the valve covers.
The 2nd gen AMC engines relied a lot on the 1956 design, believe it or not, including bore/cylinder spacing and so on. That first one took less than 18 months from beginning to production.
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