Elgin Cam Specs:

Discussion in 'Engine Topic' started by 455 Formula, Jan 28, 2011.

  1. 455 Formula

    455 Formula Veteran Member

    1,421
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    Dec 8, 2009
    Fresno, California
    I found an Elgin E274S in storage. I thought this must have been a solid lifter version of a 327/300HP camshaft, but cannot recall. Anyone have the valve events on this????
     
  2. hhott71

    hhott71 Veteran Member Lifetime Gold Member

    14,375
    1
    Mar 30, 2001
    Joplin Mo. 64801
    929 cam used in 283-400 in 60's-70's
     
  3. 455 Formula

    455 Formula Veteran Member

    1,421
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    Dec 8, 2009
    Fresno, California
    Hey, Thanks guys!!!!

    Funny thing is, Elgin shows 3 different LSA's for the same camshaft!!!!!!

    Just found another mystery cam in storage up on top the compressor room!!!!
     
    Last edited: Jan 29, 2011
  4. 455 Formula

    455 Formula Veteran Member

    1,421
    0
    Dec 8, 2009
    Fresno, California
    The specs for this cam are all over the place...

    The most consistent specifications I have found indicate 258°/269° SAE, 194°203° @ .050" and valve events of IO @ 10° BTDC - IC @ 52° ABDC - EO @ 68°BBDC - EC @ 6° ATDC.

    However, the same chart shows the camshaft havingf 90° of overlap and shows the installed position of the camshaft with the intake at 110° and the exhaust at 122° respectively.

    When I plug the numbers into my cam program, assuming a 112° with the ICL @ 110°, I get events at .050" of IO @ -12.5° BTDC - IC @ 27.5° ABDC - EO @ 35.0° BBDC - EC -13.0° ATDC and MINUS 25.5° of overlap!!!!!

    This just isn't adding up in my head.

    Any thoughts????
     
    Last edited: Jan 30, 2011
  5. 455 Formula

    455 Formula Veteran Member

    1,421
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    Dec 8, 2009
    Fresno, California
    With only .398"/.420" lift, could we run 1.6 rockers on this without cutting the slots????
     
  6. Kamikaze

    Kamikaze Veteran Member Lifetime Gold Member

    Probably not even though it is a low lift / duration cam

    1.6 rockers move the pushrod closer to the inside of the slot/ hole and rub against the casting
     
  7. 455 Formula

    455 Formula Veteran Member

    1,421
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    Dec 8, 2009
    Fresno, California
    Yeah...I hate to grind on the heads as they are fully assembled...
     
  8. Kamikaze

    Kamikaze Veteran Member Lifetime Gold Member

    Just get a couple of Louis Tools and some sharp Cobalt bits, lube them up well then cover the engine valley with some towels and use a shop vac while you drill and you should be fine.
     
  9. 455 Formula

    455 Formula Veteran Member

    1,421
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    Dec 8, 2009
    Fresno, California
    Hmmm....how much lift would we gain???
     

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