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Thread: Opinions appreciated on plugging the oil passage holes on my FE390 heads
          
   
   

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  1. #16
    jerry clayton's Avatar
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    and FE engines have oil pressure relief at end of system-one in pump is just to protect the filter on cold start ups-----

  2. #17
    DennyW is offline CHR Member Visit my Photo Gallery
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    The 427 FE has the oil pressure relief in the rear of the block. The other sizes do not as far as I know, or have seen. Easy to identify when you simply look at the rear of an FE block.

    This is an illustration from my factory 67 Ford Mercury shop manual.
    Attachment 65957

  3. #18
    jerry clayton's Avatar
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    Denny the pic you show is a side oiler 427---------I don't know if all the FE over the years had the relief valve at the rear but I seem to remember (BISTR)? that all the others had it also------I'll check the core blocks I have in storage

  4. #19
    Ranch is offline CHR Member Visit my Photo Gallery
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    Not sure about the 61 390HP but the 406 and the centeroiler as well as the side oiler 427's had a relief valve at back of block

  5. #20
    Ranch is offline CHR Member Visit my Photo Gallery
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    Ford's FE Iron Heads have a 5/16" hole coming up to and thru the head. Ford would restrict down to 3/16" with the use of steel shim head gaskets also I believe Edelbrock Aluminum heads only have a 3/16" hole coming thru the head. so restricting is really nothing new.
    Also, there is a well put together article in the in the FE Forums FAQ site that should cover everything discussed here.
    oil
    rspears likes this.

  6. #21
    DennyW is offline CHR Member Visit my Photo Gallery
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    Totally depends on the year...

    Big Block Oiling System

    FE SERIES

    Ford’s “FE” series big-blocks went through the most extensive oiling system changes of any Ford engine ever made. Most evident was the 427, which underwent significant changes throughout its service life, leading to the “Side Oiler” design of 1965.



    The 332/352/360/361/390/406/410/ 428 didn’t change much except for the distinct differences between mechanical lifter and hydraulic lifter blocks. Hydraulic lifter blocks have twin oil galleries drilled the length of the block to supply the lifters. Mechanical lifter blocks have the bosses at each end of the block, but without the oil galleries.

    The “FE” oiling system is simple in scope, with a sump-positioned oil pump and pickup centered at the front of the pan. The oil pump is driven by the camshaft via a driveshaft tied into the distributor shaft.

    The “FE” oiling system took on a distinct change in the 427. The 427 block came two ways—Top Oiler and Side Oiler. Most 427s were Top Oilers. Beginning in 1965, Ford’s concern over oil starvation at the main and rod bearings led engineers to the conception of a whole new 427 block

    casting called the “Side Oiler.” The Side Oiler had an additional oil gallery that ran down the left-hand side of the block, feeding bountiful amounts of oil to the main and rod bearings.

    All "FE" engines have a cast aluminum oil filter mount bolted to the side of the block as shown on this 428 Cobra Jet. The oil pressure sending switch or sending unit mounts on top. This is an oil pressure sender for a gauge, which is larger than an oil pressure light switch.

    Oiling system modifications for the “FE” are traditional hot rod steps. Chamfering the crankshaft journal oil holes improves oil flow. Using a high volume oil pump increases flow. High pressure isn’t

    always the answer. If you are maintaining 10 pounds of oil pressure for every 1,000rpm, your engine should remain healthy. If you expect 7,500 rpms, then ensure your oiling system will maintain 80 psi at high revs.


    I have mine set to 78 psi. Anything over 80 psi tends to wash the bearings. Not good.

  7. #22
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    The first bulletin is about the oil galley mod in the block with a pic.

    FE-Mod.jpg FE-Mod-Pic.jpg

    The last bulletin I saw that covers restricting the oil to the rockers. If you notice, the last comment says that this is for "High Pressure/High Volume" pumps.

    FE-Restriction.jpg
    Last edited by 69Bee; 06-14-2016 at 07:30 PM.

  8. #23
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    Thanks for that 69Bee! Good info.

  9. #24
    jerry clayton's Avatar
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    A lot of effort needs to be utilized to get oil back to the sump in any engine-no matter whether its high pressure, volume, etc------No matter how long or from what pressure oil setting in the cylinder heads instead of the sump is not good. As for FE engines the absence of the OEM drain back trays is a mistake--------and if you want to restrict flow to the top you better have Erson roller rocker shafts, plus drainback system.
    DennyW likes this.

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